CMMG Banshee 300 MKG 45 ACP – 5″ barrel 13‑round AR pistol

The CMMG Banshee 300 MKG Pistol 45 ACP 5″ Barrel 13‑Round is a .45 ACP‑chambered AR pistol built on CMMG’s MkG platform using Radial Delayed Blowback, giving you a compact, 45‑driven personal‑defense carbine‑style pistol that’s easy to deploy and surprisingly soft‑shooting for its caliber. It runs a 5‑inch threaded barrel (0.578×28 muzzle) capped with a ZEROED Linear Compensator, ships with Glock‑pattern 13‑round magazines (13+1 capacity), and features a MkG 7075‑T6 aluminum lower, billet 6061‑T6 upper, and EML4 M‑LOK handguard, so you get a modern AR‑style layout that’s still small enough for vehicle or home‑defense use. The ZEROED pistol grip, ambidextrous safety, and ambidextrous charging handle keep the controls intuitive and ergonomic, while the M‑LOK rails and full‑length Picatinny top rail let you mount a red‑dot, light, or compact laser for low‑light or close‑quarters work.

Why the CMMG Banshee 300 MKG 45 ACP works for home defense

The Banshee 300 MKG 45 ACP is designed to be the most compact .45 ACP Banshee pistol, so it stays maneuverable in tight hallways, closets, or truck‑cabin drills while still delivering full‑power 45‑caliber stopping power. The 5‑inch barrel and pistol configuration keep overall length short, and the M‑LOK handguard with handstop helps you keep a solid grip when the gun is shouldered on a brace or held at arm’s length. Because it is fed by Glock‑pattern .45 ACP 13‑round magazines, you can share mags with other Glock‑style 45s, and the Radial Delayed Blowback system softens recoil and bolt movement compared with straight‑blowback AR‑pistol platforms, so follow‑up shots are easier to control during stress or low‑light drills.

CMMG Banshee 300 MKG 45 ACP trigger and controls

The Banshee 300 MKG is usually fitted with a ZEROED single‑stage drop‑in trigger in the 4–5 lb range, giving you a crisp, predictable break and a solid reset that supports fast, aimed 45‑Acp strings. The ZEROED ambidextrous 60/90‑degree safety is easy to flip without moving your grip, and the ambidextrous charging handle lets you clear malfunctions or drop the bolt from either side of the gun. The integrated pistol‑grip and trigger guard follow AR‑style geometry, and the POLYMER DUST COVER helps keep debris out of the action, which is important when you’re using the gun in a dusty truck, garage, or outdoor‑space scenario.

Magazine, capacity, and practical role

This configuration ships with Glock‑style 13‑round .45 ACP magazines, giving you 13+1 in the gun and 13 in reserve for a total of 27 live 45 ACP rounds ready to go. The 13‑round capacity is ideal for:

• Home‑defense and low‑profile vehicle defense,

• Close‑quarters drills and hallway‑clearing scenarios,

• Concealed‑style truck or base‑camp PCC work,

• AR‑style training in .45 ACP without the full‑size carbine length.

The 5‑inch barrel and M‑LOK forend keep the gun short and easy to transition between standing, kneeling, or braced‑pistol positions, and the ZEROED RipBrace (or similar AR‑style brace) lets you stabilize the gun without requiring NFA paperwork in most states. The compact size and pistol‑style classification also make it attractive for range‑day 45‑Acp PCC‑style work, where you want the AR layout but more portability than a full‑size 45‑caliber carbine.

Why the CMMG Banshee 300 MKG 45 ACP stands out

Compared with many 45‑Acp PCCs that are either full‑size carbines or simple blowback AR pistols, the CMMG Banshee 300 MKG Pistol 45 ACP 5″ Barrel 13‑Round stands out because it combines CMMG’s Radial Delayed Blowback system, AR‑style ergonomics, and pistol‑short 5‑inch .45 ACP configuration in a single, compact package. The Glock‑compatible 13‑round mags, 5‑inch threaded barrel, and full‑accessory rails give you a serious, customizable 45‑driven platform that feels like a true AR pistol rather than a gimmick, and the ZEROED‑style controls and finish keep it modern and user‑friendly for both new and experienced AR shooters.

If you want a compact, 45‑Acp‑driven AR pistol that is easy to shoulder, fun to shoot, and versatile for home defense and low‑light PCC‑style use, the CMMG Banshee 300 MKG 45 ACP 5″ pistol is a strong, well‑engineered option that blends the AR platform’s flexibility with the power and feel of the .45 ACP cartridge.

Product price (5% discount vs. standard retail):
$1,099.99 – $1,399.99

Colors & Inch Available