DealThe Tiger Rock Stock Kit is the perfect way to finish out your lower receiver without breaking the budget! The lightweight and durable 6061-T6 aluminum 6 position receiver extension is proper mil-spec dimensions to accept a wide variety of after market stocks. A coated carbine spring and 3oz buffer help ensure smooth and reliable function. Kit includes end plate, castlenut, buffer tube, carbine spring, buffer, and an M4 style carbine stock. from Primary Arms (Product ST007M-ST003M) |