VFC M27 ASG Airsoft green gas is propane

Airsoft green gas is propane with a silicone based oil added to the green gas lubricating O-rings and seals inside airsoft gas products preventing them from drying out and leaking

and include O Rings

The special bottom of the magwell has a unique design to fit any magazine baseplate or HPA adapter

Double the fun of blasting bad guys with your Elite Force 1911 when you've got it loaded with a 27-round extended magazine

the HK 416 is a proven platform

VFC M27 ASG Airsoft green gas is propaneHK M27 IAR M4 AEG made by VFC is a fully licensed Heckler & Koch airsoft fun made by the team at Umarex USA. This new version features an upgraded Avalon ECS gearbox. This is a top of the line and advanced AEG with full metal construction, accepts standard M4 AR15 style airsoft magazines, retractable stock with easy access to the battery compartment, and front and reat flip up iron sights. Batteries and Charger not included.