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#1 · Sep 7, 2008 I'm trying to build an HK91/G3 clone and I'm pretty new to HK type weapons. I've built several AR15's, AR10's, several pistols and shotguns. Right now I'm buying the parts and trying to make sure I stay legal. I know I have to do the clip and pin on the trigger pack but I'm wondering about the bolt carrier. I got a line on a G3 "full auto carrier" that will be about the same price as a HK91 carrier. Question: does the bolt carrier have to be modified? Is it legal to have in a semi? I know the advantage of a M16 carrier in an AR15 is that it is heavier and actually is said to control recoil a tad better but I don't know the Hk style of weapons. Thanks for any help in advance. Sort by Oldest first Oldest first Newest first Most reactions #2 · Sep 7, 2008

leo6223 said: Question: does the bolt carrier have to be modified? Click to expand...

leo6223 said: Is it legal to have in a semi? Click to expand...

Yas, it is...

leo6223 said: I know the advantage of a M16 carrier in an AR15 is that it is heavier and actually is said to control recoil a tad better but I don't know the Hk style of weapons. Click to expand...

Actually, that statement isn't correct and also very misleading. ATF STILL maintains the position that a M-16 carrier in an AR-15 is illegal. The full auto carrier is STILL part of the restricted components. I know the odds of getting caught with a 16 carrier are slim to none, but do you really have the unlimited funds to go ahead and tempt fate? Technically, a heavier carrier will do what you say, in mega small grams... You, using it in a semi-auto AR-15 are not going to be able to discern any difference. Unless you have it mounted in a sled of some sort and have some pretty good instruments hooked up will not be able to tell the difference. The HK full auto carrier is under no such restrictions. Perfectly legal as of this second... but you'll never know what'll happen if the Obamanation gets elected. #5 · Sep 8, 2008

Shattered Mind said: No Actually, that statement isn't correct and also very misleading. ATF STILL maintains the position that a M-16 carrier in an AR-15 is illegal. The full auto carrier is STILL part of the restricted components. I know the odds of getting caught with a 16 carrier are slim to none, but do you really have the unlimited funds to go ahead and tempt fate? Click to expand...

Actually Shattered, a couple years ago Colt sent a letter in requesting clarification by ATF regarding the use of M16 carriers in semiauto-only AR15s. In the letter, ATF states that Colt may use fullauto M16 carriers in semiauto AR15s so long as the use of said carriers cannot result in firing of more than one round per pull of the trigger. The mechanics of the AR15 are such that use of a fullauto carrier by itself will not result in conversion of an otherwise semiauto-only AR15 to fire more than one round per pull of the trigger. All of the recent guns out of Colt have fullauto M16 carriers. My 6920 purchased in 2005 and 6933 purchased in 2006 both came with fullauto carriers from the factory as do all of the current LE semiauto-only rifles. The question I have is whether semiauto Colt's have some degree of protection and are treated differently than AR15s from other manufacturers due to 1) the remaining web of aluminum that inhibits placement of an autosear and 2) Colt's use of .170 inch hammer/trigger pins preventing use of an M16 hammer/trigger/disconnector? This may be the case. Could ATF again reverse their opinion on this matter and state that having a fullauto carrier in a semi rifle is illegal? Yes, and I wouldn't put it past them. 0 Reply #3 · Sep 8, 2008 Thanks for the answers So I'm gathering there is no advantage (real or perceived) to the G3 carrier over the Hk91. here's the question....the bolt that I'm buying is a HK91 bolt....is it going to fit the G3 carrier? What's the major difference between the two? Thanks again (I think I'll be a little more patient with the AR15 newbs now when they ask their questions as all of a sudden I know what it's like to be a novice again). #4 · Sep 8, 2008 The bolts are the same. The only difference is the semi bolt carrier has the receiver cut with a slot where the full auto sear trip lever would normally be contacting the carrier. That's the only difference. The real advantage to the G-3 carrier is you need it if you have a registered sear or a registered receiver gun, full auto in both cases. Provides no advantage to a semi gun at all, unless you're considering bragging rights at the local watering hole or the CDI factor. #6 · Sep 8, 2008 The ATF letter you're referring to actually permits Colt to use/install the full auto carrier IN THOSE MODELS. They applied to use the carrier in their new production firearms. Still illegal to put an M-16 carrier in any other earlier model... far as I know. Haven't read of any "lifting" of the ban in the CFR. #8 · Sep 8, 2008 (Edited)

Shattered Mind said: Still illegal to put an M-16 carrier in any other earlier model... far as I know. Haven't read of any "lifting" of the ban in the CFR. Click to expand...

Shattered, I respect you and your opinions and yet I have to disagree. This just does not stand to logic. While I know ATF is not prone to using much logic/reason, mechanically speaking how could one state that an M16 carrier is any different in one vs. another semiauto lower with semiauto-only fire control components? Now, the two features Colt lowers have that makes conversion to fullauto more difficult are the autosear block and the larger fire control pin diameter. But from a simple mechanics standpoint, a semiauto lower is a semiauto lower. The litmus test is (or should be) does the addition of said bolt carrier allow the firearm to function such that one pull of the trigger fires more than one round at a time? Provided that all fire control group parts are semiauto-only and not malfunctioning, a fullauto bolt carrier by itself cannot and will not result in more than one round fired per pull of the trigger. Okay, apologies for continuing to stray off topic. This is after all HKPro and not ColtPro. Show more replies 0 Reply #7 · Sep 8, 2008 And as far as them reversing their opinion, well, we all know they do it whenever it suits them. #9 · Sep 8, 2008 Very true. 0 Reply #11 · Sep 9, 2008 I don't claim to know all of the laws and rulings by the ATF, and I respect your opinions as well shattered but I have to go with jsurowitz on this one. There are a handful of different manufacturers that are currently shipping ar-15's with the M16 carriers. #13 · Sep 9, 2008 Yes, I'm aware of that. I assume they also petitioned ATF for permission to assemble their models with 16 carriers. Like I said earlier, it a slim to none chance of anything happening. You'd probably be in hotter water in the first place if your rifle was to come under scrutiny by the law. 0 Reply This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread. Insert Quotes Post Reply

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