Must have for frequent builder - ODIN Works 9mm Adjustable Buffer

If you do multiple builds with multiple calibers across deferent platforms, this is an essential item. Tuning rifles from 9mm to 300wsm utilizing carbine and a5 buffer tube combinations this is what you need to get the cycling and recoil impulse perfect for your project. This thing is built like an up armored tank and optics planet had the best price anywhere.