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CMMG
The CMMG Banshee Mk4 5.56 10.5" is a compact AR pistol built for shooters who need genuine capability without sacrificing portability. At just over 26 inches long and 5.5 lbs, this is the shortest 5.56mm Banshee CMMG makes—purpose-built for truck beds, backpacks, and close-quarters scenarios where a full-size rifle won't fit. Whether you're a backcountry hunter, a competition pistol shooter, or someone who values a nimble, potent truck gun, the Mk4 platform delivers the reliability and modularity you expect from an AR-pattern firearm in a size that actually goes places.
Built on CMMG's proven Mk4 lower receiver, this pistol accepts any standard AR15 upper—so you're not locked into CMMG parts, though they make solid alternatives. The setup includes a 10.5" barrel with a 1:7 twist and carbine-length gas system, paired with a CMMG ZEROED linear compensator to tame muzzle rise in a compact package. Direct impingement keeps things simple and proven. The billet aluminum upper, forged 7075-T6 lower, and M-LOK handguard balance weight savings with strength, while the CMMG RipBrace provides the support you need for solid shooting.
The Banshee ships with a ZEROED drop-in single-stage trigger, ambidextrous charging handle, and a Magpul 30-round PMAG—everything you need to run it straight out of the box. Armor Black Cerakote finish handles the elements without fuss. If you've been looking for a legitimate AR pistol that punches above its size class and actually fits your life, this is it.
| Brand | CMMG |
| Model | Banshee Mk4 |
| Caliber | 5.56x45mm NATO |
| Barrel Length | 10.5" |
| Barrel Twist | 1:7 |
| Barrel Material | 4140CM |
| Barrel Contour | MT |
| Overall Length | 26" |
| Weight | 5.5 lbs |
| Operating System | Direct Impingement |
| Gas Port | Carbine length |
| Gas Block | 0.750" non-adjustable |
| Muzzle Device | CMMG ZEROED Linear Comp |
| Muzzle Thread | 1/2 x 28 |
| Upper Receiver | Billet 6061 T6 aluminum |
| Lower Receiver | Mk4 forged 7075 T6 aluminum |
| Handguard | CMMG EML9 M-LOK |
| Receiver Extension | CMMG 6-position Fastback |
| Brace | CMMG RipBrace |
| Trigger | ZEROED drop-in single-stage |
| Charging Handle | CMMG ZEROED ambidextrous |
| Safety Selector | CMMG ZEROED 60/90 degree |
| Trigger Guard | CMMG ZEROED |
| Pistol Grip | CMMG ZEROED |
| Buffer Type | Carbine |
| Magazine Included | Magpul 30-round PMAG |
| Finish | Armor Black Cerakote |
Yes. The Mk4 platform is built on a standard AR15 pattern lower receiver, so it will accept any mil-spec AR15 upper. CMMG also makes dedicated uppers and conversion kits (with matching uppers) if you want to stick with their ecosystem.
The Banshee Mk4 ships with the lower receiver assembly (fully assembled with trigger, safety, and brace), a Magpul 30-round PMAG, and the upper receiver group with barrel, handguard, and charging handle pre-assembled and ready to shoot.
The 5.56mm Banshee with a 10.5" barrel is a legitimate truck gun and backcountry option for shooters who value compactness and capability. Whether it suits your specific hunting application depends on your local regulations, game, and personal shooting distances—consult your local hunting guidelines and consider ballistics carefully.
Absolutely. The Mk4 platform is modular. You can swap uppers, change out the brace, upgrade the trigger, add optics via the M-LOK handguard, or swap the muzzle device (it uses standard 1/2 x 28 threads). CMMG also produces compatible conversion kits if you want to change calibers down the road.
CMMG
The CMMG Banshee Mk4 5.56 10.5" is a compact AR pistol built for shooters who need genuine capability without sacrificing portability. At just over 26 inches long and 5.5 lbs, this is the shortest 5.56mm Banshee CMMG makes—purpose-built for truck beds, backpacks, and close-quarters scenarios where a full-size rifle won't fit. Whether you're a backcountry hunter, a competition pistol shooter, or someone who values a nimble, potent truck gun, the Mk4 platform delivers the reliability and modularity you expect from an AR-pattern firearm in a size that actually goes places.
Built on CMMG's proven Mk4 lower receiver, this pistol accepts any standard AR15 upper—so you're not locked into CMMG parts, though they make solid alternatives. The setup includes a 10.5" barrel with a 1:7 twist and carbine-length gas system, paired with a CMMG ZEROED linear compensator to tame muzzle rise in a compact package. Direct impingement keeps things simple and proven. The billet aluminum upper, forged 7075-T6 lower, and M-LOK handguard balance weight savings with strength, while the CMMG RipBrace provides the support you need for solid shooting.
The Banshee ships with a ZEROED drop-in single-stage trigger, ambidextrous charging handle, and a Magpul 30-round PMAG—everything you need to run it straight out of the box. Armor Black Cerakote finish handles the elements without fuss. If you've been looking for a legitimate AR pistol that punches above its size class and actually fits your life, this is it.
| Brand | CMMG |
| Model | Banshee Mk4 |
| Caliber | 5.56x45mm NATO |
| Barrel Length | 10.5" |
| Barrel Twist | 1:7 |
| Barrel Material | 4140CM |
| Barrel Contour | MT |
| Overall Length | 26" |
| Weight | 5.5 lbs |
| Operating System | Direct Impingement |
| Gas Port | Carbine length |
| Gas Block | 0.750" non-adjustable |
| Muzzle Device | CMMG ZEROED Linear Comp |
| Muzzle Thread | 1/2 x 28 |
| Upper Receiver | Billet 6061 T6 aluminum |
| Lower Receiver | Mk4 forged 7075 T6 aluminum |
| Handguard | CMMG EML9 M-LOK |
| Receiver Extension | CMMG 6-position Fastback |
| Brace | CMMG RipBrace |
| Trigger | ZEROED drop-in single-stage |
| Charging Handle | CMMG ZEROED ambidextrous |
| Safety Selector | CMMG ZEROED 60/90 degree |
| Trigger Guard | CMMG ZEROED |
| Pistol Grip | CMMG ZEROED |
| Buffer Type | Carbine |
| Magazine Included | Magpul 30-round PMAG |
| Finish | Armor Black Cerakote |
Yes. The Mk4 platform is built on a standard AR15 pattern lower receiver, so it will accept any mil-spec AR15 upper. CMMG also makes dedicated uppers and conversion kits (with matching uppers) if you want to stick with their ecosystem.
The Banshee Mk4 ships with the lower receiver assembly (fully assembled with trigger, safety, and brace), a Magpul 30-round PMAG, and the upper receiver group with barrel, handguard, and charging handle pre-assembled and ready to shoot.
The 5.56mm Banshee with a 10.5" barrel is a legitimate truck gun and backcountry option for shooters who value compactness and capability. Whether it suits your specific hunting application depends on your local regulations, game, and personal shooting distances—consult your local hunting guidelines and consider ballistics carefully.
Absolutely. The Mk4 platform is modular. You can swap uppers, change out the brace, upgrade the trigger, add optics via the M-LOK handguard, or swap the muzzle device (it uses standard 1/2 x 28 threads). CMMG also produces compatible conversion kits if you want to change calibers down the road.
