Recover Tactical 2021MG-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. 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, and the forward magazine holder increases carrying capacity. Also included with this 20/21MG model is a single-point loop-style sling and a belt compatible holster for keeping the brace in place while transporting. Speaking of transporting, this model features a folding brace which makes it even more ergonomic. 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 20/21 Stabilizer Braces! Upper optics mount sold separately. This model DOES NOT fit Gen 1 or Gen 2. It DOES NOT fit Polymer 80 Glock clones. Please see the fitment chart below that lists ALL compatible models. 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