G&G ESG B-10 2.0 Evolution Bullpup Gas Shotgun

The G&G ESG B-10 2.0 is the second iteration of G&G’s groundbreaking bullpup gas shotgun. This streamlined update trims the profile down to just 470mm while retaining the intimidating 5- or 10-shot semi-automatic burst capability. Compact, lighter, and purpose-built for CQB, the ESG B-10 2.0 provides devastating room-clearing firepower without the bulk of traditional gas shotguns.

Compact Bullpup Redesign: At under 19 inches long, the ESG B-10 2.0 is one of the shortest semi-auto gas shotguns on the market. Its reduced profile makes it easier to maneuver in tight indoor arenas, hallways, and corners, while still delivering the same intimidating spread of 5 or 10 BBs per trigger pull.

Gas-Powered Semi-Auto: Powered by green gas stored inside the stock, the shotgun maintains a consistent rate of fire and can fire up to 600 shots before requiring a refill. Its semi-automatic function lets players dominate CQB fights far more effectively than pump-action platforms.

AEG Magazine Compatibility: Unlike most gas shotguns, the B-10 2.0 feeds from AR15/M4 AEG magazines, including high-capacity mags. This eliminates reliance on specialized gas shells and simplifies reloads for players who already run M4 platforms.

Streamlined Rail Setup: The shortened frame removes the M-LOK and lower rail sections of the original, leaving a full-length Picatinny top rail and two 7 slot side rails for optics and accessories. Combined with ambidextrous fire controls and sling points, the 2.0 is stripped down, functional, and combat-ready.

Why Choose This GBB?

• Shortened bullpup profile — only 470mm overall length
• Semi-automatic gas system with selectable 5 or 10 shot bursts
• Internal green gas reservoir with up to 600 shots per fill
• Compatible with all standard AR15/M4 AEG magazines
• Full-length Picatinny top rail for optics and attachments
• Ambidextrous selector, mag release, charging handle, and sling mounts
• Functional 14mm CCW barrel threading — fits tracers or mock suppressors
• Durable polymer and metal construction with reduced weight (2.65kg)
• Black finish, compact build, optimized for CQB arenas
• Backed by G&G’s 13-month limited warranty

Specifications

Overall Length: 470 mm (18.5 in)
Weight: 2650 g (5.8 lbs)
Inner Barrel Length: 305 mm
Outer Barrel Thread: 14 mm CCW (functional)
Gas Type: Green Gas (internal reservoir)
System: Gas-Powered Semi-Auto
Muzzle Velocity: ~235 FPS (with 0.20g BBs)
Magazine Capacity: 105 rounds (included), compatible with M4 AEG magazines
Fire Modes: Semi-Auto: 5-Round Burst or 10-Round Burst
Color: Black
Construction: Polymer / Metal hybrid
Package Includes: ESG B-10 2.0 Shotgun, 105-round magazine, manual, cleaning rod
Warranty: 13 months limited (GT Advanced)