FCW SAIGA Gas Drum Magazine Adaptor For Marui TM SAIGA 12 GBB Shotgun Series Hop Chamber Black spring is around 10%

Black spring is around 10% increment on Joule power

As pictured

It is also compatible with the Action Army AAP-01

using the ghost ring design concept of AR rifle

Our SUPERLINE Hi-CAPA Split-Slide is a revolutionary product designed to provide unbeatable durability and performance

FCW SAIGA Gas Drum Magazine Adaptor For Marui TM SAIGA 12 GBB Shotgun Series Hop Chamber Black spring is around 10%FCW SAIGA Gas Drum Magazine Adaptor Metal Constructed Adaptor Octagon Black Steel Adjustable Gas Output Valve Equipped With Air Tight Rubber & Magazine Lip Maximized Gas Efficiency Drop in Adaptor Set, Ready to Install Out of the Box Fit For AW WE AR Gas Drum Magazine Compatible With Tokyo Marui TM SAIGA 12 GBB Shotgun Series MAY REQUIRE MODIFICATION TO THE DRUM MAGAZINE