I have a New CAA MCK Micro Conversion Kit for Glock FDE.  Works with the following 

GLOCK 17/19/19X/22/23/25/31/32/45)


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.