PRO M4 RETRO ARMS CNC HOP UP ASSEMBLY (RA-9426)

Complete pro hop up group
CNC machined aluminum
for m4/ar15 series electric rifles
weight 10g

This hop up chamber is a slightly redesigned version of the basic hop up chamber.
It is machined on a precision CNC machine from aircraft grade Duralumin EN AW 7075 and anodized.
This hop up chamber is r-hop ready and is intended to be used in setups that have issues with the magazine fitting into the body, not unlocking and not feeding.
The screwed-on feed shaft without shims is in the same position as the basic hop-up chamber shaft.
The height of the feed shaft can be adjusted in 0.2mm increments with included shims.
After assembly and adjustment, we recommend securing the adjustable feed shaft with medium-strength thread glue.
On the feed shaft, you can find an o-ring, which prevents those 4 bbs from falling out when reloading.
Another feature is a collector nut instead of a centering ring at the front of the chamber.
When the manifold nut is tightly tightened, it holds the inner barrel and chamber together, thus awaiting any movement of the barrel.
Just be sure not to rotate the barrel in the chamber when tightening the nut.
Another advantage of this nut is that it can accommodate rods with different external diameters (typically 8.4 - 8.5 mm).
The recent adjustment of the main shaft and feed shaft ensures compatibility with most hopup rubbers and improves feeding reliability and chamber consistency.
The adjustable power shaft part is identical to that of the ultra version.