For Marui GBB magazine, Marui MWS GBB Rifle, KSC/Maruzen/Marushin GBB magazines and Modify PP-2K gas magazines.
Made of Micro-Lead Free-Cutting brass that is harder than the standard, the valve body is more resistant to impact, corrosion and durable all round.
The CNC machined SUS303 nipple is harder than typical brass to resist deformation. The shorter extended tube increases the maximum gas storage capacity.
This new version has a slightly shorter tube.