The 20/21 Stabilizer Kit with Arm Brace is the first truly affordable stabilizer brace kit available on the market. The kit includes: Stabilizer Frame, Brace w/Strap, UCH & GCH17 Charging Handles (low/high profile), Minimalist Sling, Picatinny Side Rails, G7 Holster, MG45 Angled Mag Pouch. This model is compatible with 10mm/45ACP Large Frame Glocks.