we hi-capa 5.1 v4 gas/co2 blowback full metal by we(Airsoft Gun) 1:1 Full Size Scale Heavy Weight, Semi Automatic, 300 FPS (.20g bb's) Railing System, Adjustable Hop-up System, Adjustable Rear Sight Inner Copper Barrel, Additional Safety Functions (Grip Safety & Hammer Halt) Full Metal Construction, Weight Reduced Slide Design for Faster Action Comes with a green gas magazine, 3.3 lbs / 12 x 9 x 3 (in)