Recover Tactical 2021B-01: All of the same features that made the 20/20 popular are here just a little bit bigger. This conversion kit is constructed of a high-density glass-reinforced polymer that is impact-resistant and incredibly lightweight. Simply drop your favorite large frame Glock in, and you are ready to rock. This is the ultimate conversion kit and makes firing your Glock handgun more stable allowing the shooter to adapt the platform to multiple situations. The included Picatinny rail sections allow for the mounting of lights or lasers. The 20/21B Stabilizer brace is designed to increase the modularity of your GLOCK handgun maximizing the potential of the firearm in every way. This model comes complete with the stabilizer frame, brace with strap, and the UCH & GCH17 Charging Handles (low/high profile). If you want to increase the modularity and accuracy of your Glock handgun, then you need to pick up one of these phenomenal Recover Tactical 20/20 Stabilizer Braces! This SKU is just the stabilizer brace and the charging handles. Does not come with any other attachments. This DOES NOT fit Gen 1 or 2 handguns. Fit Chart: GLOCK 20 GEN 3 GLOCK 20 GEN 4 GLOCK 20 SF GLOCK 21 SF GLOCK 21 GEN 3 GLOCK 21 GEN 4 GLOCK 21 SF GLOCK 40 GEN 3 GLOCK 40 GEN 4 GLOCK 40 GEN 4 MOS GLOCK 41 GEN 3 GLOCK 41 GEN 4 GLOCK 41 GEN 4 MOS