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750 meters
Optimized to work with 9mm springs and Stalker spring guides
a piston buffer and bolt roller to reduce friction and lessen stress on internal parts caused by bolt movement
making it easier to pair with an R-hop patch without having to modify a bucking to make the R-hop fit
designed to adapt to each user's needs
Hop-Up Chamber for M4 SP-SILV-47 750 metersThe Retro ARMS design is very similar to the recent MaxModel chamber design, but significantly more affordable and, in our opinion, with better finishes and higher quality. Hop Up chamber for M4 type replicas. Retro ARMS chambers feature components machined from CNC aluminum EN AW 2007 and EN AW 7075; the adjustment wheel is made of polypropylene. The adjustment mechanism is highly effective because the lever does not bend due to the materials used.
