ST Kinetics CPW
Modular PDW with lever-delayed blowback and ambidextrous controls.
The ST Kinetics CPW (Compact Personal Weapon) is a submachine gun that falls into the personal defense weapon (PDW) category. Its operating system is a lever-delayed blowback design, which the manufacturer calls a cam recoil mitigation mechanism; this keeps felt recoil low and permits the use of high-pressure ammunition. The weapon is modular: the barrel and bolt assembly can be swapped out to convert the gun from standard submachine gun calibers to smaller, armor-piercing PDW rounds.
The receiver is machined from a lightweight aluminum alloy, while most other parts are high-strength polymer to cut weight and cost. The magazine, which holds 30 rounds, is housed in the pistol grip, and both the grip’s backstrap and the magazine itself are made of translucent plastic so the shooter can see the remaining ammunition at a glance. Two Picatinny rails are fitted: one continuous rail runs along the top of the receiver for iron sights or reflex sights, and a shorter rail sits under the barrel, ahead of the trigger guard, for accessories like laser modules, vertical grips, or flashlights.
Every control is ambidextrous. The cocking handle, fire selector and manual safety (located above the pistol grip), and the bolt release lever are all mirrored on both sides of the receiver. The ejection port is on the right side. A collapsible metal stock provides stability when aiming; when folded, the weapon is roughly the size of a conventional pistol and can be carried in a holster.
The prototype was chambered in 9×19mm Parabellum, but the manufacturer states the modular design allows simple conversion to 5.7×28mm or 4.6×30mm. As of 2019, the CPW was used in limited numbers by special police units in Bangladesh.
Quick Facts
- Origin
- Singapore
- Is Ranged
- yes
- Service
- 2009-present
- Designer
- ST Kinetics
- Design Date
- 2008
- Manufacturer
- ST Engineering / (formerly ST Kinetics)
- Weight
- 1.5 kg
- Length
- 500 mm stock extended / 350 mm stock folded
- Part Length
- 180 mm
- Cartridge
- 9×19mm Parabellum / FN 5.7×28mm / HK 4.6×30mm
- Action
- Lever-delayed blowback
- Rate
- 900–1,100 rounds/min
Facts from the source article.
Lore & Background
The CPW was developed by ST Kinetics as a compact personal weapon in the PDW class. Its design incorporates a cam recoil mitigation mechanism, a form of lever-delayed blowback, which allows the use of high-pressure ammunition while keeping recoil low. The receiver is machined from lightweight aluminum alloy, and most other components are high-strength polymer, reducing both weight and cost.
The weapon features a conventional submachine gun layout with the magazine housed in the pistol grip. The backstrap and 30-round magazine are molded from translucent plastic, enabling the shooter to visually check the remaining ammunition level. The barrel and bolt assembly can be quickly replaced to convert the CPW to small-caliber armor-piercing PDW ammunition.
Fully ambidextrous, the CPW mirrors all controls—cocking handle, fire selector/safety, and bolt release lever—on both sides of the receiver. The ejection port is on the right side. A collapsible metal stock provides stability during aimed fire, and when collapsed the weapon is compact enough to be carried in a holster.
Reader's Guide
The CPW represents a modular approach to the PDW concept, offering caliber interchangeability between 9×19mm Parabellum, 5.7×28mm, and 4.6×30mm through a quick-change barrel and bolt assembly. Its lever-delayed blowback system, marketed as a cam recoil mitigation mechanism, distinguishes it from simpler blowback designs by reducing felt recoil and enabling use with higher-pressure ammunition. The extensive use of polymers and aluminum alloy keeps the weapon lightweight, while the translucent magazine and backstrap provide a practical visual ammunition check. Full ambidexterity and a collapsible stock enhance its suitability for close-quarters and concealed carry roles. As of 2019, the CPW saw limited adoption by special police units in Bangladesh, but its modularity and compact form factor position it as a versatile option within the PDW market.
Did You Know?
- The CPW's magazine and pistol grip backstrap are made of translucent plastic for visual ammunition verification.
- The weapon can be converted to fire 5.7×28mm or 4.6×30mm by replacing the barrel and bolt assembly.
- All controls, including the cocking handle and fire selector, are mirrored for ambidextrous use.
- When the stock is collapsed, the CPW is compact enough to be carried in a holster.
More in Submachine Guns 1-24
Spotted an error? Know more?
Reader corrections go straight into our review queue. Suggest an edit · How this site is sourced