ZEV Technologies is leading the field in aftermarket Glock parts, upgrades, and .22lr conversion kits. This conversion kit has everything you could possibly need to transform your Gen 3 Glock 17, 22, or 31 to reliably shoot .22lr ammo. Everything comes in an easy, do it yourself conversion kit. Great for target plinking at home or for a cheap day at the range. The proprietary match grade barrel will make sure you hit the target time after time. Shoot with confidence.