HOP UP chamber CNC pro for M4 series Retroarms

HOP UP chamber CNC pro for M4 series
Retroarms brend

hop up chamber pro
CNC aluminum construction
suitable for M4/&M16 series electric rifles
weight 10g

this hop up chamber is a slightly redesigned version of hop up chamber basic.
it is machined on a precise cnc machine from aviation-grade duralumin en aw 7075 and anodized.
this hop up chamber is r-hop ready and is meant to be used in setups, which have troubles with magazine installation in the body, which are not unlocking and feeding.

the feeding shaft screwed in without any shims sits in the same position as the shaft of the basic hop up chamber.
the height of the feeding shaft can be adjusted by 0.2mm increments with included shims.
after assembly and tuning we recommend securing the adjustable feeding shaft with medium strength thread glue.
on a feeding shaft, you can find an o-ring, which prevents those 4 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 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.

the adjustable feeding shaft part is identical with the one on the ultra version.