The Maschinenpistole GBB Upgrade Guideline

The MP2A1 Upgrade Kit includes a Nozzle with an end spring, a Long Stroke Buffer Pad, a Long Stroke Cocking Knob Pawl Spring, a Barrel Spacer(an optional upgrade for 2nd batch, it reduces the muzzle energy, and increase the gas efficiency), and a Cutoff Lever. These components enhance gas efficiency and resolve issues preventing the gun from working properly.

The batches that require the kit are as follows:

  • 1st batch - 2022 AUG - Stat from NGS072210001
  • 2nd batch - 2023 JAN - Start from NGS072220001

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The Magazine Upgrade Kit includes a Loading lip, a Follower, Magazine Endplate and its Screw. These components resolve the feeding issue.

The batches that require the kit are as follows:

  • 1st batch - 2022 AUG - Stat from NGS072210001

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Instruction Videos:
Replacing with Magazine Upgrade Kit 
Replacing Cutoff Lever
Pasting the Barrel Spacer
Replacing Nozzle

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For the cumstomers in Japan, please contact your local dealer.

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