Excellent weight and very solid feeling gun. Mostly Metal design. All metal magazine holds CO2 and Airsoft BB's Very Accurate Sig-Arms Sig Sauer 1911 GSR Replica. Should have good FPS and lots of shots per CO2 based on my 4.5mm BB version testing! Very affordable and good value for the money. Rail for mounting accessories. Nice sights with white dots front and back. Recessed barrel for added realism. True 1911 style trigger even though it is double action only.