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RETRO ARMS piston head, Aluminum
It is made of high strength A7075, but the weight of the piston head and O-ring is 6.8g.
Including the thrust bearings and fixing screws, it weighs a hefty 12.2g.
The intake and exhaust holes are smaller than those of a regular aluminum piston head , with only about 1.5 Φ2.4mm holes.
This is effective when you want to assist with ammunition feeding by suction or reduce the expansion of the piston O-ring.
![[RETRO ARMS] CNC Aluminum Piston Head A1](http://rock-et.jp/cdn/shop/files/RETRO-7999_1024x1024.jpg?v=1750401635)
