Gear Watch: PH+ MWS GBBR Upgrade Parts – Engineered for Real Use

The Tokyo Marui MWS system has earned its place as a top-tier GBB platform, but like all things mechanical, it has its limits. PH+ has stepped in with eight purpose-built upgrade parts, designed not only to strengthen the system but to respect the original design logic behind Marui’s renowned durability.

📸 First Look

Part Highlights:

1. Nozzle Set (GMP-1001)

■ Robust polymer with stainless build to improve gas handling under stress.

■ Drop-in fit, no modding needed

■ Optimized for longevity and stable blowback

2. Enhanced Piston Head (GMP-1002)

■ HNBR rubber for improved sealing and better cold-weather performance.

■ Light weight, high responsiveness

3. Trigger Box Spring Set (GMP-1003)

■ 10 precision springs to refresh your internal trigger mechanism.

■ Consistent return pressure

■ Revives responsiveness

4. Block Stop Plate (GMP-1004)

■ Stainless steel plate to improve bolt catch reliability.

■ Prevents premature wear in repeated cycles

5. Nozzle Return Spring (GMP-1005)

■ Heat-treated for faster reset and smoother blowback timing.

■ Increased wear resistance

6. CNC Hop-Up System (GMP-1006)

■ Massive improvement over stock hop-up.

■ Infinite adjustability via stainless screws

■ CNC aluminum seat with precise alignment and double O-rings

■ Compatible with MWS & VSR hop rubbers from multiple brands

■ Handles wide BB weight range (0.20g to 0.40g) with confidence

7. Bolt Carrier End (GMP-1007)

■ CNC aluminum + stainless combo with an integrated bearing roller.

■ All-directional anti-friction design

■ Minimizes carrier drag for smoother blowback

8. Nozzle Return Spring Set (GMP-1008)

■ For advanced tuners, this matched pair ensures symmetrical reset forces.

💬 Why This Kit Matters:

Unlike many upgrade bundles, this kit isn’t just a repackage of a single brand’s parts. Each piece was carefully selected and refined by PH+ based on mechanical testing and live-use data with the MWS platform.

PH+ focused on reinforcing known weak points, nozzle durability, hop-up adjustability, bolt catch stability, without overbuilding or creating stress elsewhere. Every upgrade fits seamlessly, with no tolerance issues, no shimming, no filing.