This Micro Conversion Kit is a lightweight and sturdy platform for Glock handguns, turning it into the ultimate Glock Conversion Kit. It has a barrel shroud made of aluminum with a polymer body. Compatible with Glock 17/19/19x/22/23/31/32/45. The Advanced Upgrade Kit includes: Thumb rests, sling swivel, single-point sling, flashlight, and flip-up front and rear sights.