Of the many commercial .308 Winchester hundreds, couple of, if any, are designed for barrels shorter than sixteen". The one that follows assists address this gap whilst remaining straightforward to suppress and light over the wrists. The barrel is supported by a dual recoil-spring assembly paying homage to the Gen4 https://jeffreyffaxr.wikijournalist.com/5471340/not_known_facts_about_glock_switches