Brand new Argo gas pistons and plugs and o-rings

For sale aset of Argo gas pistons and plugs. Brand new. Rubber o-rings installed on plugs. These are for any shotguns using the m4 Argo gas system. These were for a rev army impact r4 but will fit panzer arms m4 federation arms S4 all the Turkenelli clones which use this system. Shipping is available at buyer’s expense.