FAB Defense Conversion Kit for Glock. Fits the 17,22,31, and 37 models. I bought this because I thought it was cool. Shot about 100 rounds through my Glock 22 mounted in it and it worked great. I just realized that I’m not a shoulder brace pistol guy. Price is for the kit only. Pistol not included! Willing to trade for other gun related items. Three Three Seven – 329 – Zero502.