MasterPiece Arms Defender 30K
MasterPiece Arms · Pistol · In Production · 2026
Also known as: MPA Defender 30K, MPA 30K
Overview
The MasterPiece Arms Defender 30K is a compact, large-format blowback pistol in 9mm, the latest evolution of MPA's MAC-style Defender platform introduced in 2026. It pairs a steel upper with an aluminum lower and runs MPA's signature Defender bolt together with a standard AR-15 fire control group for a familiar, crisp trigger. Optimized for Glock 17/19 magazines, it ships with a side-folder hinge and buffer tube adapter, leaving it ready to accept a brace or rear support. MasterPiece Arms bills it as the lightest subcompact 9mm in its PCC-style class.
Specifications
| Weight (empty) | 1899 g (67.0 oz) |
| Overall Length | 318 mm (12.52") |
| Barrel Length | 114 mm (4.49") |
| Action Type | Blowback |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Single Stage |
| Magazine Capacity | 34 rounds |
| Magazine Type | Detachable Box |
| Effective Range | 50 m (55 yd) |
| Barrel Rifling | Right Hand |
| Frame Material | Aluminum |
| Slide Material | Steel |
| Barrel Material | Steel |
| Finish | Cerakote |
Calibers
- 9x19mm Parabellum · primary · 9mm NATO — also known as 9mm Luger, 9mm NATO, 9x19mm
Features
- Firing modes: Semi Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Safety, Ar15 Fire Control Group
- Features: Large Format Pistol, Blowback Action, Glock Magazine Compatible, Ar15 Fire Control Group, Side Folding Hinge, Buffer Tube Adapter, Threaded Barrel, Steel Upper Aluminum Lower
Production
Production years: 2026-present
Built on the established Defender bolt platform with over 150,000 units reported in service
Origin
Country of origin: United States
Notes
Large-format semi-automatic pistol descended from the MAC-10/M11 lineage. Uses Glock 17/19 magazines (commonly 33/34-round sticks). Sold as a pistol with a side-folding hinge and buffer-tube adapter rather than a braced or stocked configuration. Barrel length figures vary by configuration (threaded barrels around 4.5 inches).
Background
MasterPiece Arms keeps the MAC-10 silhouette alive for the modern era: the 30K swaps the old crude open-bolt fire control for a drop-in AR-15 trigger group and Glock magazines, turning a 1970s submachine-gun shape into a parts-friendly large-format pistol.