SHS Steel Gas Inlet Valve for Airsoft GBB Magazines (Options) springer Special indirect ventilation system located

Special indirect ventilation system located at the top and bottom of frame allow air flow and heat release

The Sig Sauer 21rd Metal P320 M17 Magazine

Durable high strength polymer construction

Aluminum alloy body with deep engraving

SHS Steel Gas Inlet Valve for Airsoft GBB Magazines (Options) springer Special indirect ventilation system locatedReplaces the fill valve in your Airsoft gas magazine or grenade shell. Precision machined, O ring included Stainless steel construction Suitable for most gas powered magazines and gas 40mm grenade shells Reinforced valve capable of withstanding Co2, Top Gas, and 134a 12. 3mm Length Valve, O ring (pre installed) Head diameter options Type A 6. 4mm Head diameter options Type B 5. 45mm