Heckler & Koch HK33 - Wikipedia

Assault rifle

Heckler & Koch HK33
The HK33 SG1 with a Trijicon ACOG optical sight.
Type	Assault rifle
Place of origin	West Germany
Service history
In service	1968–present
Used by	See Users
Wars	Vietnam War Araguaia Guerrilla War[1] Salvadoran Civil War Lebanese Civil War Kurdish–Turkish conflict Internal conflict in Myanmar Cenepa War South Thailand insurgency Insurgency in Northeast India[2] Militias-Comando Vermelho conflict[3]
Production history
Manufacturer	Heckler & Koch,MKEK (licensed)
Produced	1968—2000 (H&K)1999—present (MKEK)[4]
Variants	See Variants
Specifications
Mass	HK33A2: 3.65 kg (8.05 lb)[5] HK33A3: 4.0 kg (8.8 lb) HK33KA3: 3.9 kg (8.6 lb) HK53: 3.05 kg (6.7 lb)
Length	HK33A2: 920 mm (36.2 in) HK33A3: 940 mm (37.0 in) stock extended / 735 mm (28.9 in) stock collapsed HK33KA3: 865 mm (34.1 in) stock extended / 675 mm (26.6 in) stock collapsed HK53: 755 mm (29.7 in) stock extended / 563 mm (22.2 in) stock collapsed
Barrel length	HK33A2: 390 mm (15.4 in) HK33KA3: 332 mm (13.1 in) HK53: 211 mm (8.3 in)
Cartridge	.223 Remington5.56×45mm NATO
Caliber	5.56mm
Action	Roller-delayed blowback
Rate of fire	HK33A2: 750 rounds/min HK53: 700 rounds/min
Muzzle velocity	HK33A2: 950 m/s (3,117 ft/s) HK33KA3: 880 m/s (2,887.1 ft/s) HK53: 750 m/s (2,460.6 ft/s)
Effective firing range	200–400 m (219–437 yd) sight adjustments600 metres (656 yd) with Fero Z24-G telescopic sight
Feed system	25-, 30-, or 40-round detachable box magazine
Sights	Rotary rear aperture drum, hooded foresight

The Heckler & Koch HK33 is a 5.56mm assault rifle developed in the 1960s by West German armament manufacturer Heckler & Koch GmbH (H&K), primarily for export.

Building on the success of their G3 design, the company developed a family of small arms (all using the G3 operating principle and basic design concept) consisting of four types of firearms: the first type, chambered in 7.62×51mm NATO; the second, using the Soviet 7.62×39mm M43 round; the third, chambered in .223 Remington and 5.56×45mm NATO; and the fourth type, chambered for the 9×19mm Parabellum pistol cartridge. Commercially the HK33 was a successful design but it did not sell as well as the G3.

The HK33 series of rifles were adopted by the Brazilian Air Force (Força Aérea Brasileira or FAB), the armed forces of Thailand and Malaysia where they were produced under a licence agreement. The rifle was also licence-built in Turkey by MKEK, and exported from France branded as MAS but actually made in Germany.

Design details

[edit]

Operating mechanism

[edit]

The HK33 is a selective fire weapon with Heckler & Koch's roller-delayed blowback system of operation. It employs a two-piece bolt consisting of a bolt head with a pair of rollers and bolt carrier. Upon firing, the two cylindrical rollers in the bolt head are cammed inward by inclined surfaces of the barrel extension and impart a rearward motion on the locking piece, which also propels the bolt carrier rearward. This built-in mechanical disadvantage delays the movement of the bolt head relative to the bolt head carrier which is withdrawing at significant higher velocity of the bolt head. The rollers soon compress entirely into the bolt head, clearing the locking recesses of the barrel extension, and both parts now continue rearward together, opening the breech and actuating the extraction and feeding cycles. The chamber is opened under high pressure, thus the chamber received a series of flutes in order to increase extraction reliability and prevent sticking of the spent casing to the chamber walls.

The G3 roller-delayed blowback mechanism designed around 7.62×51mm NATO ammunition was downsized and revised for reliably using 5.56×45mm NATO ammunition. This required changing geometrical transmission ratio relationships between parts. Based on the geometric relationship arising from the angles of the roller contact surfaces of the locking piece and the barrel extension recesses, the recoil of the bolt head is delayed by a ratio of 3:1 for the 5.56×45mm NATO chambering. Thus during the same period of time, the bolt head carrier moves 3 times faster than the bolt head. This ratio is continued until the locking rollers have been withdrawn from the barrel extension recesses.

Like the G3 bolt the HK33 bolt features an anti-bounce mechanism that prevents the bolt from bouncing off the barrel's breech surface. The "bolt head locking lever" is a spring-loaded claw mounted on the bolt carrier that grabs the bolt head as the bolt carrier group goes into battery. The lever essentially ratchets into place with friction, providing enough resistance to being re-opened that the bolt carrier does not rebound. The spring-powered claw extractor is also contained inside the bolt while the lever ejector is located inside the trigger housing (actuated by the recoiling bolt). Further like the G3 the HK33 also contains a spring extractor and a buffer. The ejector lever was installed in the trigger housing and is actuated by the recoiling bolt.

The reliable functioning of roller-delayed blowback mechanisms is limited by specific ammunition and arm parameters like bullet weight, propellant charge, barrel length and amount of wear. For obtaining a proper and safe functioning parameters bandwidth Heckler & Koch offer a variety of locking pieces with different mass and shoulder angles. The angles are critical and determine the unlock timing and pressure curve progression as the locking pieces act in unison with the bolt head carrier.[6][7]

Features

[edit]

The HK33 is a modular weapon system. Its butt-stock, fore-stock and pistol-grip/fire-control assembly may be changed at will in a variety of configurations (listed below). Simple push-pins hold the components in place and removing them will allow the user to remove and replace parts rapidly. The rifle is disassembled into the following components for maintenance: the receiver/barrel, stock with return spring, bolt assembly and trigger pack in pistol grip.

Trigger

[edit]

The HK33 has a conventional hammer-type firing mechanism. In the standard version, the rifle comes equipped with an ambidextrous trigger group with a selector lever that is simultaneously the weapon's safety (it has three positions: "S" or "0"—weapon is safe, "E"/"1"—semiautomatic fire, "F"/"25"—continuous fire). The "safe" setting mechanically disables the trigger. The trigger groups can be swapped out to meet the user's specific mission requirements. H&K offers several different trigger assemblies: a three-shot burst fire control group with selector lever/safety (selector settings: "0" weapon is safe, "1" single fire, "2" 2-round burst or "3" 3-round burst; the selector lever is ambidextrous); a "Navy" trigger unit (three settings: safe, semi and full auto fire) and a four-position trigger group (selector settings: safe, single fire, 3-round burst and automatic fire).

Feeding

[edit]

The rifle is fed from 20- or 25-round steel magazines weighing 250 g or 40-round aluminum magazines (weighing 157 g). 30-round arch magazines were also introduced for use with the rifle. Turkish MKEK-made rifles are issued with 30-round polymer magazines.

Barrel

[edit]

The barrel contains 6 right-hand grooves and terminates with a slotted flash suppressor that enables the use of rifle grenades and supports a standard G3-type bayonet that mounts above the barrel. The barrel end of the chamber is fluted, which assists in the initial extraction of a spent cartridge casing (since the breech is opened under very high internal cartridge case pressure). revised to the faster 178 mm (1:7 in) twist rate (used to stabilize new, heavier NATO-standard SS109/M855 ammunition).

Sights

[edit]

The firearm is equipped with a relatively low iron sight line that consists of a Drehvisier a rotary rear drum and hooded front post. The rear sight is mechanically adjustable for both windage and elevation with the help of tools. This deliberately prevents non-armorers to (re)zero the iron sight line. The rotary drum features an open V-notch (numbered 1) for rapid target acquisition, close range, low light and impaired visibility use and three apertures (numbered 2, 3 and 4) used for: 200–400 metres (219–437 yd) in 100 metres (109 yd) increments for more precise aiming. The 1 V-notch and 2 or 200 metres (219 yd) aperture settings have an identical point of aim. The V-notch and apertures are calibrated for 5.56×45mm NATO ball ammunition.

The receiver housing has recesses that work with STANAG claw mounts/HK clamp adapters (standard with the HK33, G3, G3SG/1 and MP5) used to mount day (typically the Hensoldt 4×24 telescopic sight) or night aiming optics. The Hensoldt Fero 4×24 telescopic sight and mount assembly were developed for designated marksman use. The Fero elevation knob features Bullet Drop Compensation (BDC) settings for 100–600 metres (109–656 yd) in 100 metres (109 yd) increments calibrated for 5.56×45mm NATO ball ammunition.[8]

Accessories

[edit]

Included with the rifle are a detachable bipod, bayonet (from the G3), sling, cleaning kit and a magazine loader. Additionally, the HK33 can be used to mount a 40 mm under-barrel HK79 grenade launcher or a blank-firing adaptor.

During its production life the rifle has received several minor improvements (these modified weapons are sometimes referred to collectively as the HK33E). The fixed stock was strengthened and the synthetic forearm replaced with a handguard that allows a lightweight bipod to be attached and stowed into two grooves at the base. The shoulder pad in rifles fitted with a telescopic stock was changed to a concave type used thus far in the MP5 series.

Variants

[edit]

HK33A2 Variant with a rigid synthetic stock. HK33SG/1 An accurized model; equipped with a telescopic sight and improved trigger analogous to the one used in the G3SG/1. HK33A3 Standard rifle but with telescoping metal stock. HK33KA3 Carbine version with barrel reduced in length to the base of the front sight post; also equipped with a collapsible metal stock. Due to the short barrel, the HK33KA3 cannot be used to launch rifle grenades or mount a bayonet. HK53 Compact version of the HK33K. Has a short 211 mm (8.3 in) barrel, a forearm derived from the MP5 submachine gun and a telescopic shoulder stock or receiver endplate cover (later models also received a four-prong flash hider). HK13 Light machine gun. It is fed from either box or drum magazines (the latter has a 100-round capacity), has a quick-change heavy barrel for sustained fire, shrouded with a sheet metal heat guard (replacing the synthetic forearm) and a 2-point bipod adapter. HK23 Machine gun. It is fed from a disintegrating belt. It is otherwise the same as the HK13. Harrington & Richardson T223 Licensed copy of the HK33 made during the mid-1960s[9] to compete with the M16 during the smallbore rifle trials.[10] It was mechanically identical to the HK33, except for slight changes to meet the rifle trials requirements. The selector was marked in English (Safe, S.A. (semi-automatic), and F.A. (full automatic)) rather than German (S for Sicher - "secure", or safe; E for Einzelfeuer - "single fire", or semi-automatic; and F for Feuerstoss - "firing burst", or automatic fire). The adjustable bipod was redesigned so that it had a tab that slotted into a mount behind the forend, rather than clamping to the siderails. It used the early straight-walled aluminum 20-round magazine with a bolt hold-open device. There was a lever inside the front of the trigger guard that would release and close the open bolt. The basic T223 kit came with six 20-round magazines, a bipod with carrying case, a bayonet and scabbard, and a webbing-cloth sling. It could also use the later Hecker & Koch curved 25- or 40-round magazines, which gave it more capacity than the M16's 20- and 30-round magazines.[11] It wasn't a popular seller, as any qualified client outside the US military who wanted an HK33 could just buy one (and most were still buying G3s and FALs). It was no longer featured in the company catalog after 1967 and all stocks were sold off when H&R went bankrupt in 1986. The Navy SEALs trialed it during the Vietnam War with the extended 40-round magazine as standard. Their rifle kit was similar to the commercial box except it came packed with four 40-round magazines instead. Since the magazines wouldn't fit in standard US web gear pouches, SEALs carried them in Chinese-made webgear for AK47 magazines. Although it was popular, the bias against non-American designs, its lack of compatibility with M16 magazines and accessories, and its higher cost than the M16 kept it from being adopted as a standard weapon. Type 11 A derivative of the HK33 manufactured in Thailand by the Ministry of National Defence for use by the Thai armed forces. A bullpup variant also exists with M16 sights and foregrip for close combat in jungle environments.[12] MA-11 A Myanmar-made version of the HK33 assault rifle which was fielded from the late 90s to early 2000s. It was made by KaPaSa in cooperation with Myanmar Fritz Werner Industries alongside engineers from the Electro-Mechanical and Engineering Corps of the Army of Myanmar (EMEC).[13][14] A bayonet can be mounted underneath the barrel.[14] It can use STANAG-adapted magazines.[15] MA-12 A Myanmar-made light machine gun of the HK33 made under license by KaPaSa in cooperation with Myanmar Fritz Werner Industries alongside engineers from the Electro-Mechanical and Engineering Corps of the Army of Myanmar (EMEC), which had a heavy barrel and bipod with a carry handle.[13][14] It can use STANAG-adapted magazines.[15]

Sporting variants

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HK43 Main article: Heckler & Koch HK43 Heckler & Koch also manufactured a semi-automatic only variant of the HK33A2 for the civilian market called the Heckler & Koch HK43. The HK40-series was designed for sale to conscripts so they could be familiar with their service rifle before entering military service, then a common practice in Germany and Switzerland. They had a bayonet mount and furniture just like the military model, but came with a semi-auto trigger pack instead of a full auto trigger pack. This allowed a civilian rifle to be easily made into an assault rifle just by dropping in a full auto trigger pack. It would be succeeded by the HK93A2 and its retractable stock version the HK93A3. The HK93 series had a redesigned semi-automatic trigger pack and metal shelf installed in the trigger group well that made it impossible for it to fit a full-auto trigger pack. It also had the bayonet mount removed and had different furniture. C-93 Civilian semi-automatic sporting version produced by Century International Arms, Inc. It comes with an 18.9 or 16.25-inch (413 mm) barrel with a 1:9 twist ratio. A carrying handle and 40-round magazine are standard. Advertised weight is 8.2 lbs. The C-93 is built from Thai Type-11 parts kits using an American made barrel and other miscellaneous American parts.

Combat history

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A copy of the Heckler & Koch HK33 was built under licence by Harrington & Richardson as T223 during the Vietnam War.[16] Although heavier than the M16, it was used in small numbers by SEAL teams due to its available 40-round magazine.[17] In Myanmar, the Karen National Liberation Army fielded government-made HK33s.[18] Thai government units fielded HK33s during the South Thailand insurgency.[19] Some of these rifles were seized by groups such as the Patani United Liberation Organisation[20] or the Gerakan Mujahidin Islam Patani.[21] The Kurdistan Workers' Party often claimed it seized HK33s from the Turkish forces.[22]

Users

[edit]

•  Brazil: HK33 and HK33A1 adopted by Brazilian Air Force in 1971, to replace the M1 Carbine.[23] HK33E variant.[24] HK33A2 and HK53A5 issued to 1º Batalhão de Forças Especiais[23]
•  Chile: HK33 variant.[24] Being replaced by FN SCAR-L/H[25] in the Chilean Marine Corps.
•  East Timor: HK33 [26]
•  Ecuador: HK33 variant.[24]
•  El Salvador: HK33 variant.[24] A few HK53 are used by the National Civil Police.[27]
•  Germany: HK53 variant.[24]
  •  East Germany: HK33SG/1 variant was used by Diensteinheit IX counter-terrorism unit.[28]
  •  West Germany: HK33 variant was used extensively by police and security units.[29]
•  Ghana: HK33 variant.[24]
•  Greece: HK33E variant produced under licence by EAS[24]
•  Guatemala: HK33 variant.[24]
•  Indonesia: HK53 variant is used by Komando Pasukan Katak (Kopaska) tactical diver group and Komando Pasukan Khusus (Kopassus) special forces group.[30]
•  Iran: HK53 variant.[24]
•  Ireland: HK33E variant; Army Ranger Wing, Garda Emergency Response Unit[24][31] HK53 variant; Army Ranger Wing.[32]
•  Luxembourg: The HK53 carbine variant is used by the Unité Spéciale de la Police intervention unit of the Grand Ducal Police.[33]
•  Malaysia: HK33E variant.[24]
•  Myanmar: HK33E variant. Copies produced as MA-11 and MA-12[14][24]
•  Mexico: HK33E variant.[34]
•  Netherlands: HK33 variant.[24]
•  Papua New Guinea: HK33E variant.[35]
•  Peru: HK53 variant used by Peruvian Naval Infantry, National Police Directorate of Special Operations, National Police Anti-Drug Directorate, Sinchis and National Anti-Drug directorate. HK33A2 variant used by National Police Anti-Drug Directorate and Sinchis. HK33A3 variant used by National Police Anti-Drug Directorate, National Police Directorate of Special Operations, and Tatical Actions Sub-Unit [36][37]
•  Philippines:[38]
•  Portugal: HK33E variant.[24]
•  Romania: HK33E variant.[39]
•  Saudi Arabia: HK33E variant.[24]
•  Senegal: HK53 variant.[24]
•  South Africa: Used by Special Forces.[24]
•  Spain: GEO unit of the Spanish National Police.[40]
•  Sweden: HK53 variant. Sees continued use in regional (non major cities) SWAT-teams.[41]
•  Tanzania: HK33A2 variant.[42]
•  Thailand: HK33 variant.[24] Made under license as Type 11 rifle.
•  Timor Leste National Police of East Timor[43]
•  Turkey: HK33E variant produced under licence by MKEK since 1981 under the designation of M79. Former standard assault rifle of the Turkish Land Forces now being replaced by the MPT-55.[44]
•  United Kingdom: HK53 variant was used by Royal Military Police Close Protection Units (RMP CPU),[45] 14 Intelligence Company,[46] Close Observation Platoons (COP), Royal Marines Police Troop and is known to have been used by the SAS in Northern Ireland.[47] Designated L101A1 in British military service, upgraded in 1996 at request of Army Technical Support Agency.[48] Replaced in the early 2000's by C8 SFW and C8 CQB rifles. Also used by Cumbria Constabulary's firearms unit.[49]
•  United States: HK53 variant was used by the US Border Patrol.[50]

See also

[edit]

• CETME Model L
• CEAM Modèle 1950
• FARA-83
• Franchi mod. 641
• Heckler & Koch G41
• INSAS rifle
• SIG SG 530
• List of assault rifles

Notes

[edit]

1. ^ "DESVELANDO A GUERRA ABERTA – "O Imaginário dos militares na Guerrilha do Araguaia", cap. 3". 11 April 2005.
2. ^ "Northeast insurgents add German weapons to their arsenal". 23 December 2013.
3. ^ "Recent images of Rio's drug war -". The Firearm Blog. 2017-10-04. Retrieved 2022-10-27.
4. ^ "Heckler&Koch HK 33 и HK 53 assault rifle - Modern Firearms". Archived from the original on 2018-10-25. Retrieved 2019-01-11.
5. ^ Shea, Dan. "HK33 Brochure". Small Arms Review. Retrieved 15 July 2019.[permanent dead link‍]
6. ^ "How Does It Work: Roller Delayed Blowback" – via www.youtube.com.
7. ^ Thornton, Nathan (October 12, 2019). "How Roller-Delayed Firearms Work and Why it Matters". International Sportsman.
8. ^ "Fero Z24 4×24 telescopic sight for G3 rifle instruction manual" (PDF). Archived (PDF) from the original on 23 August 2016. Retrieved 25 March 2018.
9. ^ Heckler & Koch entered into an agreement with Harrington & Richardson in 1963 to be their American partner. Heckler & Koch would submit their designs through Harrington & Richardson and their contacts rather than set up an American branch. The HK13/HK23/HK33/HK53 series was offered to Harrington & Richardson in 1964.
10. ^ Small Arms Weapons Systems (SAWS) trial of 1965.
11. ^ The improved HK curved magazines were available from 1966. The HK33 and its magazines lack the T223's hold-open system.
12. ^ "Image of Hock Gun". I257.photobucket.com. Archived from the original on 2013-10-19. Retrieved 2013-10-18.
13. ^ a b "Ka-Pa-Sa MA-11/MA-12 (HK-33) assault weapon system". Archived from the original on 2018-05-03. Retrieved 2018-07-25.
14. ^ a b c d "Burmese Small Arms Development". Archived from the original on 2018-07-15. Retrieved 2018-07-25.
15. ^ a b The World's Assault Rifles by Johnson and Nelson, Page 217.
16. ^ Thompson, Leroy (2019). The G3 Battle Rifle. Osprey Publishing. p. 44.
17. ^ Dockery, Kevin (December 2004). Weapons of the Navy SEALs. New York City: Berkley Publishing Group. p. 382. ISBN 0-425-19834-0.
18. ^ Koorey 2008, p. 165.
19. ^ Koorey, Stephanie L.K. (November 2008). Orphans and Icons: Small Arms Control and Armed Groups in Southeast Asia (PhD). Australian National University. p. 176.
20. ^ Gunaratna, Rohan; Acharya, Arabinda (2013). The terrorist threat from Thailand : jihad or quest for justice?. Washington, D.C.: Potomac Books. p. 1990. ISBN 9781597975827.
21. ^ Lumbaca, Jeremiah C. (June 2005). Islamic Insurgency And Transnational Terrorism In Thailand: Analysis And Recommended Solution Strategy. p. 126. Archived from the original on 2019-03-06. Retrieved 2019-03-06.
22. ^ "HPG / PKK : the balance of war for the year 2012". 3 October 2013. Archived from the original on 6 March 2019. Retrieved 6 March 2019.
23. ^ a b "wiw_sa_brazil - worldinventory". 2016-06-02. Archived from the original on 2016-06-02. Retrieved 2022-11-21.
24. ^ a b c d e f g h i j k l m n o p q r Jones, Richard D. Jane's Infantry Weapons 2009/2010. Jane's Information Group; 35 edition (January 27, 2009). ISBN 978-0-7106-2869-5.
25. ^ Chile; Marines confirm SCAR 5.56mm rifles order Archived 2013-08-21 at the Wayback Machine - Dmilt.com, 2 August 2013
26. ^ "Google Sites". sites.google.com. Archived from the original on 24 November 2016. Retrieved 21 March 2018.
27. ^ Montes, Julio A. (May 2000). "Infantry Weapons of the Salvadoran Forces". Small Arms Review. Vol. 3, no. 8. Archived from the original on 2019-01-19. Retrieved 2019-01-19.
28. ^ "Diensteinheit IX (9. Volkspolizei-Kompanie) - спецназ полиции ГДР. - все про оружие человечества". Archived from the original on 2019-05-21. Retrieved 2019-04-05.
29. ^ "Modern Firearms - HK HK33 and HK53". World.guns.ru. Archived from the original on 2010-09-14. Retrieved 2013-10-18.
30. ^ "Kopassus & Kopaska - Specijalne Postrojbe Republike Indonezije" (in Croatian). Hrvatski Vojnik Magazine. Archived from the original on 2010-08-22. Retrieved 2010-06-12.
31. ^ "Garda College Yearbook listing weapons training on page 66" (PDF). Archived from the original (PDF) on 2014-01-24.
32. ^ Lally, Conor (2004-09-06). "Call for increase in Army's Rangers". The Irish Times. Retrieved 2021-03-26.
33. ^ "Equipement :: Unité Spéciale de la Police ::". USP.LU. Archived from the original on 2011-07-22. Retrieved 2013-10-18.
34. ^ Gander, Terry J.; Hogg, Ian V. Jane's Infantry Weapons 1995/1996. Jane's Information Group; 21 edition (May 1995). ISBN 978-0-7106-1241-0.
35. ^ Alpers, Philip (2010). Karp, Aaron (ed.). The Politics of Destroying Surplus Small Arms: Inconspicuous Disarmament. Abingdon-on-Thames: Routledge Books. pp. 168–169. ISBN 978-0-415-49461-8.
36. ^ Montes, Julio A. (August 2011). "Peruvian Small Arms: Gunning for the Shining Path" (PDF). Small Arms Defense Journal: 25–29. Archived from the original (PDF) on 2016-03-04. Retrieved 2018-07-05.
37. ^ "wiw_sa_peru - worldinventory". 2016-05-29. Archived from the original on 2016-05-29. Retrieved 2022-10-26.
38. ^ "Rice Not Guns - German Arms in the Philippines". Archived from the original on 7 September 2010. Retrieved 23 December 2014.
39. ^ "Menirea Intervenției Rapide" (in Romanian). Presa Militara Romana. 2004. Archived from the original on April 8, 2009.
40. ^ [1] Archived December 13, 2008, at the Wayback Machine
41. ^ "Man anhållen misstänkt för skjutning mot polisbostad i Västerås". Archived from the original on 2018-09-23. Retrieved 2018-09-22.
42. ^ "Google Sites". sites.google.com. Archived from the original on 24 November 2016. Retrieved 21 March 2018.
43. ^ Robert Muggah and Emile LeBrun, ed. (October 2010). Timor-Leste Armed Violence Assessment Final Report (PDF). Special Report No. 12. Small Arms Survey. p. 17. ISBN 978-2-940415-43-4. Archived from the original (PDF) on 2017-05-05. Retrieved 2018-08-30.
44. ^ "MKEK - Makina ve Kimya Endüstrisi Kurumu". Archived from the original on 7 May 2016. Retrieved 23 December 2014.
45. ^ Geraghty, Tony (1988). Bullet Catchers: Bodyguards and the World of Close Protections. ISBN 0246131705.
46. ^ "L101A1: The British HK53s". British Rifle Resource.
47. ^ McNab, Andy (1995). Immediate Action. ISBN 0552153583.
48. ^ "British report on receiver damage to HK53 and G3 rifles". www.smallarmsreview.com.
49. ^ "Raoul Moat: police armed to the teeth for any showdown". www.telegraph.co.uk.
50. ^ "Guns of the United States Border Patrol". Human Events. Archived from the original on 2010-05-07. Retrieved 2013-10-18.

References

[edit]

• Johnson, Gary Paul; Nelson, Thomas B. (2016). The World's Assault Rifles. Ironside International Publishers. ISBN 978-1-61984-601-2.
• Woźniak, Ryszard (2001). "p. 105-107". Encyklopedia najnowszej broni palnej - tom 2 G-Ł (in Polish). Warsaw, Poland: Bellona. ISBN 83-11-09310-5.

External links

[edit] Wikimedia Commons has media related to HK33.

• HKPRO HK33
• HKPRO HK53
• Modern Firearms
• HK33 operator's manual
• HK33 operator's manual also containing the HK53 variant

v t e Delayed blowback firearms
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Hesitation locked	M50 Reising Remington Model 51 Remington Model 53 Remington R51 SIG MKMO
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Pistols	HK4 VP70 P9 P7 MK23 USP P2000 P30 HK45 VP9
Service rifles	G3 HK33 G41 G36 HK416 HK417 HK433 M27 IAR G28
Sniper rifles	HK G3 SG1 HK 33 SG1 PSG1 MSG90 SL9SD
Civilian rifles	HK41 HK43 MR223 MR308 SL6 SL7 SL8 SR9 USC
Shotguns	HK 512 FABARM FP6
Submachine guns	MP5 UMP MP7
Machine guns	HK21 MG4 MG5
Grenade launchers	HK69A1 AG-C/EGLM AG36 M320 GMG XM25 CDTE
Prototypes	Handguns P46 Rifles HK32 HK36 G11 XM29 OICW XM8 Shotguns HK CAWS
Miscellaneous	P2A1 P11 4.6×30mm 4.6×36mm L98A2

v t e Sturmgewehr 45 derivatives
Battle rifles	Select fire Automatkarbin 4 CETME Models C, E & R HK G3 SG 510 Semi-automatic rifles Azb DMR MK1 PE-Stgw. 57 PSR-90 HK PSG1 HK SR9 HK41 PTR CETME Sporter
Intermediate rifle	Assault rifle CEAM Modèle 1950 CETME Model A & B CETME Model L HK 32 HK33 HK G41 SG 530-3 Semi-automatic rifles HK43
Submachine guns	MP5 HK 36
Machine guns	HK21 CETME Ameli SIG MG 710-3