The Maschinenpistole GBB Update History

MP2A1 2nd Batch Updates

  1. Failure to Fire Issue: Resolved by enlarging the reset sear to improve tolerance with the bolt carrier and top cover.
  2. Feeding Problem: Resolved by redesigning the dimensions of the magazine's loading lip and follower.
  3. Magazine Insert Detachment: Fixed by implementing a pin through the shell and magazine insert.
  4. Bolt Carrier Improvement: Refined internal edges to prevent O-ring damage.

MP2A1 3rd Batch Updates

  1. Low Muzzle Velocity: Resolved by implementing a new jet nozzle valve design.
  2. Semi-Auto Mode Malfunction(Burst): Corrected through minor dimensional adjustments.
  3. Gas Efficiency Enhancement
  4. Added O-ring at nozzle spring base.
  5. Implemented long stroke kit to reduce firing rate.

MP2A1 Pro-Elite/UZI50

  1. CO2 Compatibility: Enhanced by adding a nozzle-end spring for improved air seal.
  2. Gas Efficiency: Optimized through receiver manufacturing process refinement.
  3. The CO2 Nozzle comes with the "Hot Weather O-ring"(The O ring is no longer to serve) for CO2 magazine.

UZIVN、UZIFAZ、UZIVNJP、

  1. Upgraded gas routing system gas magazines.
    Note: Modification may be required for compatibility with 1st batch MP2A1.

UZI60

  1. CO2 Magazine Leakage was resolved through:
    a. Upper magazine dimension adjustments.
    b. Manufacturing process optimization.
  1. It comes with the "All Weather O-ring" for both CO2 and gas magazine.

MP2A1, 2024 NOV

  1. CO2 Compatibility: Enhanced by adding a nozzle-end spring for improved air seal.
  2. Gas Efficiency: Optimized through receiver manufacturing process refinement.
  3. It comes with the "Cold Weather O-ring” for using the CO2 magazine in the summer time.
  4. The aditional "Hot Weather O-ring"(The O ring is no longer to serve)  is in the red zip bag comes with the gun.

MINI

  1. Enhanced Precision: Implemented 60-degree softer hop-up packing for better shot grouping.
Back to blog