Rocket Airsoft Pro-1 M4 Metal Hopup Chamber Gas Gun Magazines and attach this instead

and attach this instead

The new G&G Combat Machine series airsoft gun

All metal so you can add flash hiders

KM 45 Degree for VSR

High capacity (Hicap) magazines usually hold 300 rounds or more

Rocket Airsoft Pro-1 M4 Metal Hopup Chamber Gas Gun Magazines and attach this insteadThe Rocket Airsoft Pro 1 M4 Metal Hopup Chamber is an advanced design similar to the Prowin, but with a different cut and some extra parts included. Clean and aluminum make will fit in all M4 AEG airsoft guns' gearboxes. Includes SHS rubber bucking, but we recommend another bucking, such as a Maple Leaf, sold separately. Great for HPA gun installs! Packaging is Rocket Airsoft (OEM SHS).