10-03-2020, 02:13 PM
(This post was last modified: 10-03-2020, 02:14 PM by jonny rotton.)
its one of the new group buy 16" barrels in an aero upper with a bcm rail. the bolt carrier is a lightweight nickel boron. bolt is unknown who made it. just a standard spring and buffer. this is not my first build, it may be around my 20th.

