This guide details the significant parts compatibility challenges inherent in building 9mm AR-15 platforms, contrasting them with the standardization of 5.56 AR-15s. It highlights issues with bolt geometry, trigger compatibility, proprietary systems, and magazine feed angles. The video emphasizes the need for thorough research and potential manual fitting due to the lack of universal specifications in the 9mm AR market, advising builders to expect 'teething pains'.
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.
