Our machined aluminum two piece design offers strength and makes it easy to mount an Mil spec/comm buffer tube. Bolts to your gun using the existing holes from the wire stock and the stock latch plunger. It will not wiggle out during fire and has a tight precision fit and also has a small set screw on the top of the adapter to secure the threaded stock tube. The addition of a buffer tube stock will greatly improve accuracy and shot grouping as it provides a firm shoulder rest and helps to balance the weapon. Upgrade your MAC today! Installation instructions & Allen wrench included. New Flat (Matte) Black finish shown in last few photos.(gun and other accessories sold separately) Fits Mac-10 9mm & .45 acp SMG ONLY, Does NOT fit MPA guns.