Of the many commercial .308 Winchester hundreds, few, if any, are designed for barrels shorter than sixteen". The one that follows helps handle this gap though remaining very simple to suppress and light-weight around the wrists. The barrel is supported by a dual recoil-spring assembly harking back to the Gen4 https://glock-with-switch14432.wikibuysell.com/1645382/not_known_details_about_glock_switch_keychain