G&G ESG B-10 Evolution Bullpup Gas Shotgun

The G&G ESG B-10 Evolution Shotgun Bullpup-10 is a compact, gas-powered semi-automatic shotgun designed for high-intensity CQB skirmishes. Featuring a unique bullpup layout with an internal gas reservoir, this shotgun combines realistic ergonomics with practical performance. Its ability to use standard AEG M4 magazines sets it apart from traditional gas shotguns, giving players unmatched flexibility in both loadouts and reloading speed.

Compact Bullpup Power: By moving the action behind the grip, the ESG B-10 achieves a short overall length without sacrificing barrel length, perfect for navigating tight indoor spaces or aggressive CQB play.

Gas-Powered Semi-Auto Action: Powered by green gas stored in the buttstock, the B-10 delivers consistent semi-automatic fire with selectable 5-round or 10-round burst modes. This makes it versatile enough for precision room clearing or overwhelming firepower when the situation calls for it.

AEG Magazine Compatibility: Unlike most gas shotguns, the ESG B-10 feeds from AEG-style M4 magazines. This means you can use the same mags as your rifle setup, simplifying logistics and allowing faster, more affordable reloads.

Customizable & Tactical Ready: Outfitted with dual Picatinny rails (top and bottom), side M-LOK slots, and ambidextrous controls, the B-10 is designed for maximum adaptability. From optics to grips and lights, you can configure this shotgun to match your CQB loadout perfectly.

Why Choose This GBB?

• Compact bullpup design optimized for CQB skirmishes
• Gas-powered semi-auto with selectable 5 or 10 round burst modes
• Uses AEG M4 magazines for seamless loadout integration
• Internal green gas reservoir in the buttstock for consistent performance
• Functional 14mm CCW threaded barrel for tracers or mock suppressors
• Full ambidextrous controls — selector, mag release, charging handle, sling points
• Durable aluminum and polymer construction
• Generous rail space with Picatinny and M-LOK compatibility
• Easy-to-access gas valve, HPA adapter-ready
• Backed by G&G’s 13-month limited warranty

Specifications

Overall Length: 560.4 mm (22.06 in)
Weight: 3140 g (6.92 lbs)
Inner Barrel Length: 200 mm
Outer Barrel Thread: 14 mm CCW 
Gas Type: Green Gas (internal reservoir)
System: Gas-Powered Semi-Auto
Muzzle Velocity: ~250 FPS (with 0.20g BBs, 5-round burst)
Magazine Capacity: 105 rounds (included G&G G-08-201), compatible with AEG M4 magazines
Fire Modes: Semi-Auto: 5-Round Burst or 10-Round Burst
Color: Black
Construction: Aluminum (rails, front receiver) & reinforced polymer (rear receiver)
Package Includes: ESG B-10 Shotgun, 105-round magazine, manual
Warranty: 13 months limited