Update: WE M4A1 GBBR

After waiting 8 months for my WE M4 open bolt parts, 2 WE part orders later the M4 parts that I had actually requested finally arrived. Though they arrived a little too late to take full advantage of the warm GBB-friendly summer weather, at least my WE M4 is up and running again – complete with working factory bolt stop (modified), brand new factory BCG and freshly-installed factory trigger group.

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My GBBR now sports a couple of newly installed slick parts:

  • Troy Alpha VTAC Rail 13″ FDE
  • B5 Systems SOPMOD Stock Bravo FDE
  • BCM Gun Fighter’s Grip Mod 0 FDE

Parts I’ve had from before have found their way onto this gun:

  • AABB X300
  • ACM T1 with Larue-style Mount
  • Magpul PTS ASAP
  • ACM Daniel Defense A1.5-style Fixed Sights
  • TSC KNS Gen1-style Anti-Rotation Pins
  • TSC KAC-style Ambidextrous Safety Selector
  • TSC PRI-style Gas Buster Charging Handle
  • Madbull Noveske Low Profile Gas Block
  • ACM VLTOR-style Compensator

More photos after the break.

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This is less than 1000 rounds through this brand new BCG, and the reinforced tab that locks up against the bolt stop has already broken off. This is a first for me – though many a WE OB BCG has destroyed itself in my gun, I’ve never had a BCG break in this place before.

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One of these days I’ll post a list of all the problems (and fixes) I’ve encountered with my WE M4 over 3 generations.

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