The Sig Sauer MK25 Black GBB Pistol is a high-fidelity gas blowback replica of the renowned MK25 platform, featuring a full-metal slide and frame with a durable black finish. Chambered for 6 mm BBs, this pistol outputs approximately 300 FPS (0.20 g BBs) under standard green gas operation. Its precision-rifled 4.3″ (110 mm) steel inner barrel paired with an adjustable rotary hop-up unit delivers consistent shot groupings and accuracy, making it suitable for both recreational plinking and competitive skirmishes.

Powered by green gas or propane, the robust blowback mechanism cycles a steel slide that reciprocates with a crisp, realistic recoil impulse. The ergonomically contoured polymer grip panels feature aggressive front and backstrap texturing for a secure hold during rapid-fire sequences. An ambidextrous magazine release and slide catch/release lever ensure versatile handling, while a manual thumb safety on the left frame locks down the trigger when not in use. Fixed three-dot iron sights—fiber-optic front post and drift-adjustable rear notch—facilitate quick target acquisition in varied lighting conditions.

Under the dust cover, a 20 mm Picatinny rail allows attachment of tactical accessories such as weapon lights or lasers. The included mid-cap magazine holds 15 rounds of 6 mm BBs and incorporates an integrated gas reservoir. A gas fill valve compatible with standard green gas adapters permits fast recharges between matches. The magazine’s pressure adjustment screw lets shooters fine-tune muzzle velocity to comply with field limits. A high-tension follower and reinforced stainless-steel spring ensure smooth BB feeding, minimizing jams during extended firing sequences.

Loading and maintenance are straightforward: retract the slide, insert BBs into the magazine chambers, fill with gas, and seat the magazine until it clicks. The slide stop lever locks open when the magazine is empty for rapid reloads. A transfer bar safety prevents discharge unless the trigger is fully depressed, ensuring safe handling. With an overall length of 200 mm and weight of approximately 920 g (unloaded), the Sig Sauer MK25 Black GBB Pistol balances stability and maneuverability, making it an ideal choice for serious airsoft enthusiasts, tactical training, or collectors seeking a realistic MK25 replica.

Technical Specifications

• Type: Gas Blowback Pistol (GBB), Full-Metal Construction
• Caliber: 6 mm BBs (0.20 g recommended), operates on green gas/propane
• Velocity: ≈300 FPS (with 0.20 g BBs; adjustable via magazine gas screw)
• Barrel: Precision-rifled steel inner barrel, 110 mm (4.3″)
• Hop-Up: Adjustable rotary hop-up unit
• Magazine Capacity: 15 rounds (mid-cap) with integrated gas reservoir
• Slide & Frame: Die-cast zinc-alloy, matte black finish
• Grip: Ergonomic polymer panels with aggressive front/backstrap texturing
• Sights: Fiber-optic front sight; drift-adjustable rear notch (three-dot system)
• Controls: Ambidextrous reversible magazine release, slide catch/release lever
• Safety: Manual thumb safety; transfer-bar mechanism
• Rail: 20 mm Picatinny under dust cover for lights/lasers
• Length: 200 mm overall
• Weight: ≈920 g (unloaded)

Key Advantages

• Authentic full-metal slide and frame deliver realistic weight and durability
• Precision-rifled barrel and adjustable hop-up for consistent accuracy and grouping
• Ergonomic grip panels with aggressive texturing for secure handling
• Ambidextrous controls and manual safety ensure versatile, secure operation
• Fiber-optic front sight and adjustable rear notch for rapid target alignment
• 20 mm Picatinny rail supports tactical accessories (lights, lasers)
• Reliable 15-round mid-cap magazine minimizes reload frequency, with gas adjustment screw for tuning
• Transfer-bar safety system prevents accidental discharge for safer handling