. I've place it into numerous unique firearms with various calibers ranging from 7.sixty two, 9mm, five.fifty six, ect. Its ran flawlessly in each one. I did not have to swap buffers or springs or something. Just flip to third position and he or she's able to go.. Many thanks https://rarebreedfrt90122.blog5.net/82121766/the-ultimate-guide-to-frt-15