This gun was built to cycle subsonic 300 blackout with a suppressor. I do not recommend shooting supersonics through this unless you change the buffer or gas adjustment. It will need to be tuned to your specific can.
Build specs:
Spikes Lower
Timney Trigger
Magpul stock and grip
Aero 16" .300 BLK with adjustable gas block threaded 5/8-24 upper
Holosun dot/magnifier combo
Nickle Boron BCG
Ambi charging handle
Extra BCM 16" 5.56 upper
Sig romeo red dot
Would trade for revolvers. Will not piece out.