Accepts Glock Style 9MM Magazines – Comes partially assembled includes: – Magazine Catch and Ejector – Designed for last round hold open – Uses standard AR-15 lower parts – Machined from 7075 T6 Aluminum – Receiver Finish: Type 3 hard Anodized Black – Lowere Receiver Material: Forged 7075 T6 Auminum – Trigger Guard: Open Trigger – Weight: 5.000 – RF-85 Treated: Non-Treated