Looked through the 5 pages here, nothing similar to my question so need to ask...why? It's a new build (Anderson pistol lower, Aim Surp bcg, BCM ambi-c.h., and a PSA 10.5" upper) that, otherwise functions just fine with or without my SRT can.
Probably have only run 300 rds through it thus far and this has me stumped. Any ideas, guys?