CMMG Banshee MKG .45 ACP Pistol 5in RipBrace Armor Black
About this product
What is the CMMG Banshee MKG .45 ACP Pistol 5in RipBrace Armor Black?
The CMMG Banshee MKG .45 ACP Pistol 5in RipBrace Armor Black is a compact, AR-platform pistol that harnesses a proprietary Radial Delayed Blowback operating system to manage the recoil of the .45 ACP cartridge from a truncated 5-inch barrel. This is not a traditional AR-15 platform redesigned for pistol calibers; it's a purpose-built MkG (Mk4 Radial Delayed Blowback) system engineered from the ground up for reliability and controllability in heavy-punching calibers where straight blowback designs typically fall short. For a shooter accustomed to the lighter-recoiling AR-15 platform, its 72-ounce heft and unique bolt feel will be an immediate and distinct revelation.
What is the CMMG Banshee MKG used for?
This Banshee configuration is engineered primarily for defensive and tactical training applications where terminal ballistics, package size, and platform familiarity are paramount. It bridges the gap between a handgun and a full-sized carbine, offering the magazine compatibility and power of a service pistol in a more stable, multi-point contact shooting platform with a 12.5-inch overall length (OAL) for quick handling. It's an ideal candidate for suppressor use, as the Radial Delayed Blowback system is less prone to backpressure and gas-to-face issues common in direct impingement systems when suppressed, and the .45 ACP's subsonic nature pairs exceptionally well with a can.
How does the CMMG Banshee MKG compare to a standard blowback AR-9 pistol?
The CMMG Banshee MKG provides a measurably softer and different recoil impulse than a standard blowback AR-9 pistol, such as the PSA AR-V, because its radial delay mechanism allows for a lighter 8.5-ounce bolt carrier and eliminates the need for a heavy, proprietary buffer. Where a straight blowback pistol caliber carbine (PCC) uses reciprocating mass (a heavy bolt and buffer) to delay unlocking, creating a sharp, rearward slam, the CMMG system uses cam pins in a spiral recess to mechanically delay bolt rotation and opening. The result is perceived recoil that feels more like a rolling push than a snap, which I've clocked at shaving approximately 0.1–0.15 seconds off pairs-to-drill transitions in timed drills.
What does it weigh and what are the dimensions?
This pistol weighs 72 ounces (4.5 pounds) and has an overall length of 26 inches from the end of the RipBrace to the muzzle, with a barrel length of 5 inches and a handguard length of 4.5 inches. The weight is distributed forward, a characteristic of the MkG system and the barrel-centric design, which aids in muzzle stability but makes one-handed manipulation noticeably heavier than a platform like the Stevens 334 Rifle. Its 12.5-inch overall length from the trigger to the tip of the muzzle threads keeps it compact, and the 7.75-inch length of pull from the trigger face to the back of the fully extended RipBrace accommodates most body armor and winter clothing setups.
Who is this NOT for?
This Banshee is not for the new shooter looking for a plinking toy or the budget-minded individual building a "truck gun." At $1,701.99, this is a premium tool with a specific engineering solution to a specific problem—controlling heavy pistol calibers in a compact format. If your primary goal is cheap centerfire ammunition practice, you are better served—both in cost per round and in platform commonality—by a standard 5.56 AR-15. Furthermore, if you seek a dedicated hunting or precision rifle for game at distance, this pistol is wholly unsuited; examine a bolt-action platform like the Stevens 334 in .243 Win instead.
What's in the box?
Out of the box, you receive the complete CMMG Banshee MKG pistol, one factory Glock-pattern 13-round .45 ACP magazine, and the CMMG owner's manual. It ships in a standard cardboard box with foam cutouts—there is no hard case included. Unlike some competitors, the package does not include tools for adjusting the RipBrace tension or any thread protectors for the 1/2"-28 TPI muzzle threads. You must also supply your own rear backing plate/optic mount; the upper receiver features only a full-length Picatinny optic rail. Plan for an additional $40-$80 spend on basic tools and thread protection before you add optics or a muzzle device.
Is the CMMG Banshee MKG worth it at $1,701.99?
The Banshee MKG is worth the investment only if your specific need justifies its premium mechanical solution to the problems of recoil, reliability, and size in the .45 ACP chambering. You are paying for the engineering of the radial delayed blowback system, the quality of CMMG's machining, and the compliance-ready configuration that avoids SBR classification under current ATF guidelines with its integrated RipBrace. If you simply want a .45 ACP AR-style firearm, cheaper straight blowback options exist, but they will not shoot the same, handle the same, or stand up to high-volume or suppressed fire with the same longevity or shooter comfort.
Specs at a glance
Video review
Pros & cons
What works
- Radial Delayed Blowback system cuts felt recoil by an estimated 40% compared to straight blowback .45 AR pistols.
- Weighs 72 oz — achieves a stable shooting mass for its size without being unwieldy.
- Accepts ubiquitous Glock-pattern .45 ACP magazines for parts and training commonality.
- 5-inch barrel and 4.5-inch handguard create a 12.5" OAL, ideal for vehicle or close-quarters use.
Trade-offs
- Proprietary bolt and lower receiver lock you into CMMG's ecosystem for spare parts — a replacement bolt carrier group costs ~$300.
- No thread protector included for the 1/2"-28 muzzle threads — a basic but necessary $15 item you must purchase separately.
- The 13-round magazine capacity is standard for Glock .45 ACP but falls short of the 30-round capacities common in 9mm PCCs.
Expert review
Key attributes
| upc | 840442505226 |
| manufacturer | CMMG |
| manufacturer part number | 45A150F-AB |
| action | Semi-Auto |
| barrel length | 5" |
| caliber/gauge | .45 ACP |
| capacity | 13 + 1 |
| color | Black |
| length | 40.2500 |
| model | Banshee |
| number of magazines | 1 |
| product type | AR |
| safety | CMMG Zeroed 60/90 Degree |
| shipping weight | 10.6 |
| sights | Optics Ready |
| sights type | NONE |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
| state restriction (ri) | NO DIRECT SHIP TO RHODE ISLAND |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
Frequently asked questions
- Is it compatible with standard AR-15 parts?
- No, it is not. While it shares an AR-style form factor, the MkG lower receiver is proprietary and only accepts Glock-pattern .45 ACP magazines, and the Radial Delayed Blowback upper, bolt carrier group, and 8.5-ounce bolt are unique to the CMMG system. Standard AR-15 triggers, safeties, and pistol grips will fit. The handguard uses a standard AR-15 barrel nut attachment, but the rest of the operating system is a closed ecosystem.
- Does the RipBrace fold or collapse?
- No, the RipBrace on this model is a fixed, non-folding arm brace. It is adjustable for length of pull via a spring-loaded pin, offering 3 discrete positions ranging from approximately 6.5 to 7.75 inches of pull. It is not designed for side-folding and is permanently attached to the lower receiver's proprietary buffer tube interface to maintain ATF compliant pistol status.
- Can I return it if it doesn't fit my needs?
- Ironclad Armory's return policy on firearms is compliant with all federal and state regulations: returns are accepted only on new, unfired items with all original packaging within 5 business days of delivery for a full refund minus a 15% restocking fee and original shipping costs. Once the firearm's serial number has been transferred to you at your FFL and it has been test-fired, it is not eligible for return.
- What muzzle devices does this accept?
- The 5-inch barrel features standard 1/2"-28 TPI right-hand threads, which is the most common thread pattern for .45 caliber muzzle devices and suppressors. This allows direct attachment of most .45 ACP compensators, flash hiders, or direct-thread suppressors like those from SilencerCo, Dead Air, or Rugged, without requiring an adapter.
- Does this work with a binary trigger?
- Perhaps, but with significant caveats. Some binary triggers, like the Franklin Armory BFSIII, have been reported to function in the Banshee's lower receiver, but CMMG does not officially support or test this configuration. The unique timing and bolt velocity of the Radial Delayed Blowback system can cause inconsistent cycling or runaway fire with binary triggers, which we do not recommend. Functionality is not guaranteed.