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1x CNC Made Aluminum Hopup Barrel Spacer (With Engraved STALKER logo)
To accommodate different brand of barrel
smoothening the motion to open the magazine valve
CNC machined in 6000 aluminium series
Advanced Piston Head (GBB/TAC41) chest rig cover 1x CNC Made Aluminum HopupThis piston head features: Viton O ring with a ventilated design. No airbrake, short, medium & long airbrake options (for 4. 60 mm internal nozzle for TAC 41 GBB cylinder head only). POM piston ring NBR 80 O ring damper Stainless steel CNC construction, for additional piston mass (from 30. 2 up to 32. 2 grams, instead of 7. 6 grams for the original piston head) An airbrake is cutting the air flow before the piston hits the bottom of the cylinder,