Retro Arms Airsoft CNC Rotary Hop Unit M4 M16

Retro Arms CNC Hop Up Chamber M4 / M16

Our good old Retro Arms hop Up chamber for M4 / M16’s with a recently fine tuned main shaft and feeding shaft.

The chamber is machined on a precise CNC machine from aviation-grade aluminium  EN AW 7075, is anodized and even though the chamber doesn't have any extra adjustable features such as feeding regulator etc, it is already R-hop ready and it's a powerful upgrade part machined with tight tolerances.

On a feeding shaft, you can find an o-ring, which prevents unfired BBs from falling out when reloading.

Another feature is a collet nut instead of a centering ring in the front of the chamber. When the collet nut is tightened, it holds the inner barrel and the chamber centered and tightly together and thus mitigating any movement of the barrel. Just make sure that you do not let the barrel rotate in the chamber when you tighten the nut. Another advantage of this nut is that it can hold barrels with different outer diameters (typically 8.4 - 8.5 mm).

Recent fine tuning of the main shaft and feeding shaft ensures compatibility with most HopUp rubbers and improves feeding reliability and consistency of the chamber.

Hop Up Chamber BASIC is designed for players, who want a 100% reliable and precise Hop Up chamber that just works without necessity to tune anything.

Same Day Dispatch on All Orders Placed Before 3pm Monday – Friday

For Airsoft Use Only, cannot be Adapted or Modified for any other purpose

Bullseye Country Sport

Your No 1 Outdoor Hobby Store

Footwear, Field Sports, Camping Equipment and more

Always on Target