SilencerCo Octane 5/8 x 24 Fixed Mount AC189

Replace your spring retainer, spring and piston for this fixed thread mount. It allows the use of the Octane 9 and Octane 45 on a fixed barrel firearm with thread sizes 1/2x28, 1/2x36, and 5/8x24. Made with stainless steel and given a black oxide finish. SilencerCo Octane 5/8 x 24 Fixed Mount AC189