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-MAXX M4A PRO HOPUP UNIT
RetroArms created new innovation on our Hop-Up chamber – the collet nut connection
You can adjust the rate of fire by swapping these over
This combo nylon/metal grid mask covers the lower face
DEAD AIR SIERRA 9 w/ XENO QD MOUNT VERSION:TRACER VERSION -MAXX M4A PRO HOPUP UNITThe PTS Dead Air Sierra 5 mock suppressor or tracer unit is machined from 6061 aluminum and features a hard anodized finish. The knurling on the Sierra 5 body offers a distinctive appearance as well as superior grip for installing or removing the silencer onto a gun and the Sierra 5 includes the PTS Dead Air R series front endcap. The PTS Dead Air Sierra 5 has QD (quick detach) capability via the proprietary PTS Dead Air Xeno mounting system. The
