The Colt CGL-4, also known as the XM148, has an airsoft version made by VFC. This is a 40mm under barrel grenade launcher that was designed to replace the M79 Thumper during the Vietnam War. The airsoft version is also 40mm launcher that uses 40mm gas grenade BB showers. This can fit the XM177E2 or M16A1 airsoft replicas that are true 1:1 scale. Real Fake Guns get unbox one and give their first impressions.