Perfect for your new build or as a direct replacement for worn out parts. M5 .308 carbine buffer spring for use in .308 AR's with a collapsible buttstock. M5 .308 rifle buffer spring for use in .308 AR's with a fixed buttstock. Made in the USA! Note: Rifle spring will not work with .308 carbines with a collapsible stock. Mfg: Aero Precision
