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M4 CQB-R Open Bolt GBBR

WE M4 CQB-R Open Bolt GBBR — Gas Blowback — Assault Rifle specifications and source-backed technical data.

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Specifications

Manufacturer
WE
Power source
Gas Blowback
Magazine pattern
WE M4 Open Bolt GBBR
Hop style
Adjustable
Rail interface
Picatinny / 20mm
Published FPS
Current UK retailer lists up to approximately 350 FPS depending gas/conditions
Magazine capacity
32 BBs

Product information

The WE M4 CQB-R Open Bolt is a compact gas-blowback M4-pattern rifle. UK retailer specifications list approximately 660–750 mm overall length, around 2.95 kg weight, a 6.03 mm inner barrel and semi/full-auto operation.

The cited UK listing places output around 325 FPS, while other retailers differ slightly on weight and configuration. Airsoft DB records that discrepancy rather than forcing a false single figure.

At a glance

  • Included/reference magazine: 32 BBs
  • Magazine pattern: WE M4 Open Bolt GBBR
  • Hop-up: Adjustable
  • Gearbox: WE Open Bolt M4 gas blowback rifle system
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FPS / Joule calculatorUse your chrono reading and BB weight

Enter FPS and BB weight to calculate muzzle energy.

Published figures are a reference, not your replica’s chrono result. Equivalent speeds assume the same energy; changing BB weight can change measured energy. Check your own readings and your field’s limits.

Compatibility explorerMagazines, battery and attachment interfaces
Magazine pattern
WE M4 Open Bolt GBBR
Rail interface
Picatinny / 20mm

Magazine notes

Uses WE Open Bolt M4/AR gas magazines; current UK listing states 32-round capacity.

A shared pattern or interface helps narrow your search; it does not guarantee fit across every brand or revision. Follow model-specific notes.

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Manuals & diagramsModel-specific reference documents

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Tracked UK retailer prices

Price history

Recorded selling prices, including out-of-stock listings. Delivery costs are excluded.

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