Smart design. easy install, quality materials. - Strike Industries AR Picatinny Stock Adapters

Liked it so much I bought another. Great for doing an AR22 build with the cmmg conversion kit. Remember that when you remove the buffer tube, there's nothing to hold in your retainer pin and spring. Additionally, there will be a 3/8+ gap where the buffer would normally sit and the back of your bolt carrier group. Which should be fine for your cmmg dissent style uppers, but you'll need something to fill that gap if using the cmmg 22lr bcg because it will blow back. At first I used a piece of pex tubing, but ultimately I 3d printed a spring loaded "faux buffer" peice that allowed me to use the detent pin and spring in to hold it in place.