The 20/21 Stabilizer Kit with stock is the first truly affordable stabilizer kit available on the market.Features* Ready for use out of the box* Simple installation (see video)* Uses the Guns built in sights, no need to calibrate sights* Compatible with over 40 Glock models* Compatible with multi gen Glocks* Compatible with compensators* Compatible with Red Dot optics* No pistol disassembly or permanent modifications required* Ergonomic no modifications required UCH Charging Handle (or charging can be done using a red dot optic)* Lightweight and compact* Made from glass reinforced polymer* Modular with optional picatinny rail adapters* Increases accuracy* Fully functional with folded armbrace* Compatible with the G7 proprietary holster* Compatible with Umarex and Cybergun officially licensed line of airgun and airsoft Glock pistols*