. I have place it into several different firearms with various calibers starting from seven.sixty two, 9mm, five.fifty six, ect. Its ran flawlessly in every one. I did not have to swap buffers or springs or just about anything. Just flip to 3rd position and she's all set to go.. https://brookspitgm.review-blogger.com/57803809/little-known-facts-about-frt