Weird AR Bolt Carrier

[NavyShooter]

Um.

It's not hard to remove that attachment from your bolt.

A bench grinder will do a fine job.

Tidy it up with a few passes from a coarse, then a fine stone to tidy things up, and you're good to go.

Or, dig out your dremel (if you're a TRUE home gun-smith!)

A Mill would be.....FAR more than what you'd need to just remove that.

NS

 

[greentips]

I hope you did not pay too much for it - because I will go smack that guy in the head!!!

 

[Leg]

From the photos it looks like the addition may not be far enough forward to actually trip an auto sear. But then I'd be at a complete loss as to explaining why it was added in the first place. Could have been bubba's attempt at making a full auto that went wrong?

Perfectly legal though, so I'd leave it as is, it's going to look ugly either way, so why mess with it?

 

[Plinker]

From the photos it looks like the addition may not be far enough forward to actually trip an auto sear. But then I'd be at a complete loss as to explaining why it was added in the first place. Could have been bubba's attempt at making a full auto that went wrong?

Perfectly legal though, so I'd leave it as is, it's going to look ugly either way, so why mess with it?

+1. Again, it's not a regulated component in Canada, and in my view, no different that dropping in an M16 carrier. As I mentioned earlier, though, don't ever take this thing across the US border.

 

[NavyShooter]

I believe it's correct in stating that it's not enough to trip a proper auto-sear, however, it is capable of tripping the DIAS system. (The DIAS was designed to function in a Semi-auto only rifle, using the original style Semi-auto bolt. This mod has added a piece of metal into the correct location for this.)

NS

 

[Leg]

I believe it's correct in stating that it's not enough to trip a proper auto-sear, however, it is capable of tripping the DIAS system. (The DIAS was designed to function in a Semi-auto only rifle, using the original style Semi-auto bolt. This mod has added a piece of metal into the correct location for this.)

NS

I do believe that you're incorrect. The DIAS was made so that a semi-only receiver could be made full auto, without modifying the lower. It still required the use a full auto trigger mech and bolt carrier in order to function. It was just a way of locating the sear in the proper position without having to drill the hole for the sear pin and hog out the extra material inside the lower.

 

[Weapontech]

I do believe that you're incorrect. The DIAS was made so that a semi-only receiver could be made full auto, without modifying the lower. It still required the use a full auto trigger mech and bolt carrier in order to function. It was just a way of locating the sear in the proper position without having to drill the hole for the sear pin and hog out the extra material inside the lower.

I believe LEG, that you are correct.......
The drop-in autosear required all other full-auto components be installed. Its design was based on the ability to "drop in" a trip lever, without having to drill the receiver.

However, I don't believe this bolt carrier was modified to operate a DIAS.
I believe it was modified to operate the now infamous "Automatic Disconnector" marketed by SWD in 1985. (Also known as the "lightning link")
(NS, I think this is what you were thinking of......)

An ingeniously simple machine-gun in a wallet....cause it literally fit in a person's wallet when they were done with it. It was ultimately banned by the BATF in that it was deemed a machine-gun in of itself.

The lightning link was THE invention, that caused all AR manufacturers to produce bolt carriers that are fully cut-out at the bottom.

 

[RePete]

It is for a "drop in" auto-sear, or a bolt carrier activated hammer disconnector. Both of these "auto additions" require this particular type of arrangement on the bolt carrier. Before the BATF made them illegal in the U.S., you used to be able to buy a bolt-on section meant to fit the large slot at the bottom of a semi-auto bolt carrier, resulting in the same outcome.Either way, I have no idea of the legality of this type of aftermarket modification.

But they kept coming loose even when red loctite was applied.

 

[Weapontech]

But they kept coming loose even when red loctite was applied.

Absolutely.......that's why some genious decided to start manufacturing his own replacement bolt carriers with the lower sections restored!

 

[contact148]

google lighting link for more info

that bolt would have worked fine(with lighting link) BEFORE it was modded now it would not work

 

[NavyShooter]

I stand corrected.

NS

 

[22rimfiredude]

Quaterbore has an interesting, and in depth, article about the "Lightning Link". The differences between bolt carriers is illustrated nicely.

 

[liberal-hater]

The lightning link was THE invention, that caused all AR manufacturers to produce bolt carriers that are fully cut-out at the bottom.

Only Colt completely cuts off the bottom of the carrier, no other manufacturers do that.

 

[Weapontech]

Only Colt completely cuts off the bottom of the carrier, no other manufacturers do that.

That's correct, as Colt was THE only significant manufacturer of AR's at that time. Now of course, things are different.