[RETRO ARMS] CNC Hop Up Chamber AR15 PRO

*Note*
Since the shape is different from the UNI version before the minor change, it cannot be attached to the CNC Split Gearbox V2 with int. Hop Up Chamber UNI - QSC (8mm) or earlier V2 gearboxes with integrated chambers.

This is a standard electric AR15/M4 chambered from EN AW7075-T651.
It can be used with the company's V2 series gearbox and Tokyo Marui-compliant Ver.2 gearbox.

The PRO version has a separate part for the bullet feed pipe that fits into the magazine.
The length can be adjusted by inserting a shim in between, allowing it to be adjusted to suit individual differences in magazines.
The standard dimension is when no shims are used, and each shim is 0.2mm x 5 pieces, which can be used to extend the length by a total of 1mm.

At the tip of the chamber, a joint development between RETRO ARMS and GAW was carried out.
It is equipped with a collet nut to fix the inner barrel and center it.
The collet nut only needs to be lightly tightened.

The hop dial is a stepless adjustment type with O-ring tension.
The hop lever is a seesaw type that uses regular cushion rubber.
Two types are included: a vertical direct press type for long hops such as R-HOP.

The inner diameter of the chamber is wide at Φ9.8mm to accommodate thick hop packing.
Depending on the combination of hop-up pad and inner barrel, clearance adjustment may be required.
The part through which the nozzle passes is Φ7.6mm.

Ten spacer O-rings are included to fill the gap between the outer barrel and the chamber and press it against the gearbox with elasticity.
Adjust the number according to the gap.