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MP7 GBB not locking back

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  • MP7 GBB not locking back

    Got a Umarex MP7 gas blowback suddenly stopped locking back on last round.

    I have no idea why. Would be grateful if anyone would know.

    Mags are fine - I have 2 identical Umarex MP7s. The other MP7 locks back normally with same mags.
    Drop'm out with a low cap and save the environment.

  • #2
    Hello bud this happened with my mates tm gbb mp7! It’s the wear on the internal catch it needs accessing and re filing to make it function again bud!

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