Description
The Military Arms MAC 5K 9mm 30+1 5.80in Threaded Barrel is a compact roller-delayed blowback pistol that brings proven MP5-series ergonomics to a modern semi-auto platform. Chambered in 9mm Luger, this optics-ready handgun features a threaded barrel for suppressor use and accepts standard MP5/SP5 magazines. Finished in RAL 8000, it weighs 4.60 lbs and measures 13.70 inches overall. Built for shooters who want a familiar roller-lock system in a compact, accessory-ready package.
| Manufacturer | Military Arms |
|---|---|
| Model | MAC 5K (12750009) |
| Material | Steel receiver with polymer handguard (per manufacturer specs) |
| Compatibility | MP5/SP5 magazines, aftermarket roller-lock parts |
| Finish | RAL 8000 (olive brown) |
| Weight | 4.60 lbs |
| Condition | New |
Key Features
- Roller-Delayed Blowback Action – Reduces felt recoil and keeps the muzzle flat for faster follow-up shots. Why it matters: You stay on target without fighting the gun, especially during rapid strings.
- Threaded 5.80-Inch Barrel – Factory-threaded for direct suppressor attachment. Why it matters: No gunsmith needed to run a can; just thread on your favorite 1/2×28 suppressor.
- Optics-Ready Receiver – Integral rail mount accepts red dots and micro sights. Why it matters: You can zero a dot without adapter plates, speeding up target acquisition.
- Ambidextrous Safety Selector – Safe and fire positions accessible from either side. Why it matters: Left-handed shooters can manipulate the safety without breaking their grip.
- MP5/SP5 Magazine Compatibility – Uses standard 30-round MP5-pattern magazines. Why it matters: If you already own an MP5 clone, your mags and pouches work here without changes.
Who It’s For
This pistol is built for shooters who want a compact roller-delay system for training, competition, or home defense. It suits experienced shooters familiar with MP5 platform controls, as well as new shooters who want a low-recoil 9mm that handles like a carbine. If you plan to run a suppressor or red dot from day one, the MAC 5K saves you the cost of aftermarket threading or milling.
Pros & Cons
- Pro: Roller-delayed action gives you soft, linear recoil that makes fast splits easy.
- Pro: Threaded barrel and optics rail come standard—no extra parts to buy.
- Pro: Uses widely available MP5 magazines and aftermarket parts.
- Con: The 5.80-inch barrel is short for a 9mm, so muzzle velocity is slightly lower than a full-size pistol (around 1,100 fps with 124-grain loads).
- Con: The roller-delay system requires periodic lubrication and cleaning to stay reliable—expect a break-in period of 200–300 rounds.
Comparison: MAC 5K vs. Zev Technologies OZ9 vs. Agency Arms AOM
| Feature | Military Arms MAC 5K | Zev Technologies OZ9 | Agency Arms AOM |
|---|---|---|---|
| Action | Roller-delayed blowback | Striker-fired (Glock pattern) | Striker-fired (Glock pattern) |
| Barrel Length | 5.80 in (threaded) | 4.49 in (threaded option) | 4.25 in (threaded option) |
| Magazine | 30+1 (MP5 pattern) | 17+1 (Glock pattern) | 17+1 (Glock pattern) |
| Weight | 4.60 lbs | 1.85 lbs | 1.70 lbs |
| Price | $1,087.96 | $1,299.99 | $1,399.00 |
FAQ
Does the MAC 5K come with a suppressor-ready barrel?
Yes. The 5.80-inch barrel is factory-threaded 1/2×28, standard for most 9mm suppressors. You can attach a suppressor directly without any adapter or gunsmithing.
What magazines does the MAC 5K accept?
It accepts standard MP5/SP5-pattern magazines. The gun ships with one 30-round magazine, and aftermarket options from HK, KCI, and ETS will work.
Can I mount a red dot without buying extra parts?
Yes. The receiver is optics-ready with an integral rail mount. You can install most micro red dots (RMR, Holosun 407C/507C, etc.) directly on the receiver without adapter plates.
Is the MAC 5K legal in all 50 states?
It is legal in most states, but check your local laws regarding threaded barrels and magazine capacity. The 30-round magazine may be restricted in some states. We ship to all 50 states with compliance checks.
How does the roller-delayed action affect reliability?
Roller-delayed systems are very reliable when properly lubricated and broken in. Expect to run 200–300 rounds to fully seat the rollers. Use high-quality 9mm ammunition (124-grain NATO or similar) during break-in.
Why Buy From Us
- ✔ Nationwide delivery (all 50 states)
- ✔ Ships 1-2 business days
- ✔ 30-day returns
- ✔ Secure checkout
Shop more semi-auto handguns: Semi Auto Handguns | 9mm Pistols | Suppressor-Ready Pistols
Last updated: April 2026
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