subsonic load for AR57

[mak91]

Down the original ar15 mag well.

[Garrett]

Originally Posted by mak91

Down the original ar15 mag well.

Yep - which makes things even better. If you use a hollowed out M16 mag as a brass catcher, you have the added benefit that it is also covering the ejection port, muffling port noise.

[kanton]

Does the AR57 upper require the AR-15 buffer assembly?

Thanks.

[mak91]

Yes it does, It comes with a heavy buffer, I think its just over 8oz if I remember correctly.

[LouBoyd]

The AR57 has a special bolt and "buffer". Both are heavier then bolt carrier and buffer in an AR-15. The AR-57 is a straight blowback design, not gas operated. It does require a buffer spring. This is my AR-57 pistol: The plastic "magazine" is the brass catcher. That requires cutting off the feed lips. . The one shown holds all 50 pieces of spent brass. The buffer shown is a M1S "pistol" buffer. It uses a standard AR-15 Carbine spring. The much shorter GSE pistol buffer will not work as the AR57's bolt is not bored out from the rear like the bolt carrier in an AR-15 is.

[i8asquirrel]

no its came with a heavier buffer that you use with your AR spring!