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There are plenty of 9mm AR pistols out there, but the CMMG Banshee Mk4 stands apart the moment you send the first round downrange. Instead of the clunky straight blowback action most pistol caliber ARs rely on, CMMG runs its Radial Delayed Blowback system, which uses a rotating bolt to delay the action and shed bolt weight. The payoff is a noticeably softer recoil impulse and a gun that stays flat during quick strings of fire. Pair that with the 5" barrel, the shortest 9mm tube CMMG offers, and you get a seriously compact package that still runs like a full-size AR.
The build quality here is a step above the usual PCC fare. You get a billet 6061 aluminum upper mated to a forged 7075 lower, a medium taper 4140CM barrel with a salt bath nitride finish and 1:10 twist, and CMMG's Zeroed linear compensator on the 1/2×28 threaded muzzle. The EML4 handguard gives you M-LOK slots at 3, 6, and 9 o'clock plus a full-length Picatinny top rail and a built-in handstop. Out back, CMMG's RipBrace on a six-position receiver extension deploys fast, and the ambidextrous charging handle and 60/90 degree ambi safety keep things friendly no matter which hand runs the gun. The whole thing weighs in around 4.7 pounds.
This one runs CMMG's 9ARC conversion magazines, and a 30-rounder comes in the box. Since the lower is a standard AR15 pattern, the manual of arms is exactly what you already know, and you can even convert spare PMAGs to 9mm with CMMG's conversion adapters. The flat top is optics ready, so drop on a red dot and you're set for range days, steel matches, or keeping it staged as a compact home defender.
The Tungsten gray Cerakote gives this Banshee a clean, distinctive look while adding real protection against wear and the elements. CMMG backs it all with their Lifetime Quality Guarantee, which says a lot about how they build these.
It feeds from CMMG's 9ARC conversion magazines, and one 30-rounder ships with the gun. Because the lower receiver is standard AR15 pattern, you can also convert Magpul PMAGs to 9mm using CMMG's conversion adapters, which makes stocking up on spares pretty painless.
It's a real difference you can feel. Most 9mm ARs use straight blowback, which needs a heavy bolt and delivers a sharp, clunky impulse. CMMG's system uses a rotating bolt to delay the action, so the bolt is lighter and recoil comes through softer and smoother, keeping the muzzle flatter for fast follow-up shots.
Yes, the barrel is threaded 1/2×28, the standard pitch for most 9mm suppressors and muzzle devices. From the factory it wears CMMG's Zeroed linear compensator, which spins off easily when you're ready to run a can. The short 5 inch barrel keeps the overall package manageable even with a suppressor attached.
No iron sights are included. The upper has a full-length Picatinny top rail, so it's ready for a red dot, holographic sight, or backup irons of your choosing. Most owners run a compact red dot on these, which suits the pistol's close-range role well.
| UPC | 840442503819 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 94AD90F-TNG |
| Product Type | AR |
| Sights | Optics Ready |
| Safety | Ambidextrous |
| Action | |
| Barrel Length | 5" |
| Caliber/Gauge | 9mm |
| Capacity | 30 |
| Color | TUNGSTEN |
| Model |
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