Kj works mk1 gas pistol

The KJ Works MK1 is a non-blowback gas pistol modelled after the classic Ruger MK-I, though it's an unlicensed replica. It features a fixed slide, making it exceptionally gas-efficient and whisper-quiet - perfect as a stealth sidearm or backup gun in outdoor or close-quarters play.

Key Features & Specifications

• Operation: Gas-powered, non-blowback design with double-action only (DAO) trigger. The inner barrel moves as you pull to load and fire each shot.

• FPS / Performance:

  • Typical velocity: ~350-400 FPS with 0.20 g BBs (about 0.98-1.1 joules) using green gas.

  • Higher readings up to ~450 FPS reported in warm conditions or with propane-based gas

• Construction: Alloy (metal) internal frame under an ABS/polymer outer shell; full-metal barrel; metal hop-up chamber in newer units

• Hop-Up: Fixed but adjustable internal hop-up unit (requires small hex key via top-receiver slot).

• Magazine: Drop-out heel magazine in the grip holds both gas and up to 17 BBs; easy to load and refill.

• Sights & Safety: Fixed front and adjustable rear iron sights; onboard sliding safety switch on grip frame.

• Size & Weight:

  • Length: ~245-250 mm (~9.5 inches)

  • Weight: ~550-565 g (approx. 1.2 lb) empty.

Performance & Usability

• The gas efficiency is outstanding: one fill can deliver 40-50+ shots before noticeable power drop-off, making it ideal for extended use without frequent refills.

• Accuracy is reasonable for a backup pistol - users report groupings of around 1-2″ at 6 m with good hop-up setup and heavier BBs like 0.25-0.30 g.

• However, the trigger pull is long and heavy, due to its moving-barrel DAO system. It takes practice to keep sights steady through the full pull cycle.

Pros

• Extremely gas-efficient and quiet operation

• Lightweight and compact, ideal as a secondary or stealth pistol

• Solid reliability and construction for its price

• Fixed hop-up and adjustable rear sight help tune shot consistency

The KJ Works MK1 is a practical, no-frills sidearm made for gas efficiency and stealthy backup use. Its simple static slide design, light build, and durable internals make it reliable and user-friendly in passive roles. While its trigger feel is unique and less forgiving than blowback pistols, it delivers respectable FPS and accuracy for its class.