This video performs an autopsy on a Palmetto State Armory (PSA) AR-15 upper receiver, diagnosing a significant barrel extension alignment issue. Impact marks on the barrel extension lugs and failure of alignment tools confirm the problem. Potential causes include improper assembly timing, a mis-milled index pin notch, or over-torquing.
You've reached the end! 1 videos loaded.
Gun Laws by State
Read firearms regulations for all 50 states + D.C.
Find Gun Dealers
Search licensed FFL dealers near you.