MAC 5K
The MAC 5K is Military Armament Corp’s compact 9mm MP5K-pattern pistol — a blowback-operated semi-automatic with a 5.8” threaded barrel, 30-round magazine, and the iconic submachine gun-inspired profile that makes the MAC 5K one of the most visually distinctive 9mm pistols available. Built as a civilian-legal pistol with the MP5K’s compact format and threaded barrel for suppressor compatibility, the MAC 5K pairs naturally with 9mm suppressors for a hearing-safe range experience.
Read our full MAC 5K Buying Guide ↓
MAC 5K vs. MAC-5: Two Platforms, One Family
Military Armament Corp produces two distinct 9mm pistols: the MAC-5 with its 8.9” barrel and the MAC 5K with a shorter 5.8” barrel inspired by the HK MP5K’s compact format. The “K” designation mirrors HK’s own Kurz (short) designation for the MP5K variant. The MAC 5K’s 5.8” barrel produces a more compact overall package than the MAC-5 while both share the same 30-round magazine, blowback operation, and threaded barrel for suppressor mounting. For buyers who want the most compact MAC format: MAC 5K. For buyers who want the longer barrel for improved velocity and sight radius: MAC-5. Both are excellent suppressor hosts in 9mm.
Threaded Barrel: Suppressor Host Capability
The MAC 5K ships with a threaded barrel from the factory — ready to accept 9mm suppressors without aftermarket thread adapter work. The compact MP5K-pattern format makes the MAC 5K an inherently practical suppressor host: the short barrel keeps overall suppressed length manageable, and the 9mm caliber is one of the most effectively suppressed common cartridges available. With subsonic 9mm ammunition and a quality suppressor, the MAC 5K produces genuinely hearing-safe report. The NFA $200 tax stamp was eliminated January 1, 2026, making suppressor ownership straightforward. See our suppressors page for compatible 9mm cans.
30-Round Capacity: Range Practicality
The MAC 5K’s 30-round magazine provides extended range sessions without frequent reloads — a practical advantage for target shooting and training where magazine management interrupts sustained firing. The magazine’s capacity is a key part of the MAC platform’s appeal for buyers who want high-round-count range use in a compact 9mm platform. The blowback operation is mechanically simple, reliable, and easy to clean.
MAC 5K vs. MP5K-Pattern Competition
The MAC 5K competes with other MP5K-pattern civilian pistols including the Century AP5 and HK SP5 at the premium end. The Century AP5 offers licensed MKE production quality; the HK SP5 is the factory HK civilian MP5. The MAC 5K positions as the most accessible price point in the MP5K-format market. For buyers who want the format at the lowest price with a factory threaded barrel: MAC 5K. For buyers who want documented military production lineage: AP5 or SP5. Browse our MP5 page for all MP5-pattern pistols.
Related Pages at Impact Guns
See the full Military Armament Corp brand page and MAC-5 model page. For MP5-pattern alternatives see the Century AP5 and HK SP5. Browse our MP5 page and pistol caliber carbines page. For suppressors see our suppressors page. For ammunition see our 9mm ammo page.