Delivery before X-MAS only for orders received by December 17, 2025.
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View larger The highest quality HopUp chamber designed for tuning M4 / M16 replicas. Rotary chambers manufactured by Maxx Model Products are made for the most demanding of players, they offer precise workmanship that is unprecedented on the market and perfect operation of the HU system in the replica.
M4W = is for Wolverine HPA MTW Milspec, Forged, Billet a MTW-9.
MX-HOP010MW
: MAXX
CNC Aluminum Hop-up Chamber M4W unit is precisely machined to perform accurately and consistently with guns from Wolverine on standard M4/M16 platform.
The Hopup Chamber M4P unit is built with an aluminum Rotary Dial Knob for fine hopup adjustments, the precision Hopup Lever and 4 mm Bucking Nubs (6 mm Bucking Nubs are optional) to perform best with R-Hop and Standard-Hop to keep the BB shooting accurately and consistently on every single shot.
The Hopup Chamber M4P unit is wisely equipped with an interchangeable Inlet Adaptor OD11mm to ensure the hopup unit is inserted exactly in the center of the 11mm inner bore ICS AEG Gearbox nozzle outlet without wobbling (inlet adaptor OD11.5mm and OD12mm are optional).
Also mounted the removable CNC Brass Side Wings to slide smoothly into the outer barrel slots, and included an advanced CNC Delrin Locking C-Clip to hold the inner barrel tight in place without wobbling and twisting.
*** The Dual UV LED Tracer Module is an add-on option to glow BB in the dark. (Sold separately)
Features:
Specification:
Set includes:
| Color | Black |
| Hop-Up chamber material | Metal |
: Pro Win
PW0004
CNC Hop-Up Chamber by Pro-Win for AEG rifles M4 / M16 in blue. Adjustment ring for stable hop-up tuning. High-precision CNC machining from aircraft-grade aluminum. Anodized finish in cobalt blue. One of the most widely used upgrade chambers. Improves performance and accuracy when properly sealed.
6388
CNC Hop-Up Chamber AR15 BASIC by RetroArms in black. Designed for AEG AR15 rifles (M4, MK18, M16, SR-25, and others). Made from aircraft-grade aluminum EN AW 7075. Ready for R-Hop and standard buckings. Collet nut ensures perfect barrel centering and stability during firing. O-ring in the chamber inlet prevents BBs from falling out during reloads....
: EPES
E381-SS
Set of Replacement O-rings for AEG Hop-Up Chamber Adjustment Elements from various manufacturers. When one ring wears out, you'll have an immediate solution at hand! No stress, be EPeS!
: EPES
E381-PCH
Precision and Accuracy are influenced by variations in shot power. This dispersion should be minimized as much as possible. O-rings are placed on the inner barrel instead of the spring, pushing the AEG chamber more onto the gearbox. This extends the lifespan of the gearbox and, most importantly, improves performance consistency. You'll notice the...
: EPES
E360-01
EPeS shims between mechabox and chamber are always here to help you fine-tune feeding! Got a new chamber and the original nozzle is too long and doesn't feed? Don't want to disassemble the mechabox and void the warranty? The solution is to move the chamber further from the mechabox using shims. No stress, be EPeS!
: MAXX
MX-HOP010MA
The highest quality HopUp chamber designed for tuning M4 / M16 replicas. Rotary chambers manufactured by Maxx Model Products are made for the most demanding of players, they offer precise workmanship that is unprecedented on the market and perfect operation of the HU system in the replica.
: MAXX
MX-HOP010MP
The highest quality HopUp chamber designed for tuning M4 / M16 replicas. Rotary chambers manufactured by Maxx Model Products are made for the most demanding of players, they offer precise workmanship that is unprecedented on the market and perfect operation of the HU system in the replica. M4P = for POLARSTAR engines