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CMMG
The CMMG Banshee Mk3 308Win 12.5 Armor Black is a short-barrel .308 Winchester pistol built on CMMG's proven Mk3 platform—the AR-10 sized foundation that brings modern rifle modularity to a full-power rifle caliber in a compact, maneuverable package. If you've shot AR-15s and want the ballistic punch of .308 Win in a shorter form factor for hunting, home defense, or specialized shooting applications, the Banshee Mk3 delivers genuine stopping power without the length of a traditional rifle.
CMMG engineered this pistol around the LR-308/DPMS Gen 1 high-pattern design, meaning you get the ergonomic familiarity and parts compatibility that serious shooters expect. The 12.5-inch 4140CM chrome-moly barrel with a 1:10 twist is paired with a CMMG ZEROED linear compensator (5/8x24 threading) and mid-port gas system to manage recoil and keep the gun under control. Billet 7075-T6 aluminum receivers, an ambi charging handle, and a smooth single-stage trigger from CMMG's ZEROED line round out a purpose-built platform that respects your experience with modern tactical rifles.
Wrapped in Cerakote Standard finish, topped with an 11-inch CMMG EML11 M-LOK handguard for mounting optics and light, and sporting the CMMG RipBrace and a carbine-length buffer system, this 7.4-pound pistol strikes the balance between portability and shootability. It ships with a 20-round Magpul PMAG and measures 29.5 inches overall—a genuine alternative to full-size .308 rifles when you need something faster through tight spaces without sacrificing caliber or reliability.
| Brand | CMMG |
| Model | Banshee Mk3 |
| Caliber | .308 Winchester |
| Barrel Length | 12.5 inches |
| Barrel Material | 4140CM Chrome-Moly Steel |
| Barrel Twist | 1:10 |
| Barrel Contour | MT |
| Overall Length | 29.5 inches |
| Weight | 7.4 lbs |
| Gas System | Direct Impingement, mid-port |
| Gas Block | 0.750 Non-Adjustable |
| Upper Receiver | Billet 7075 T6 Aluminum |
| Lower Receiver | Mk3 Billet 7075 T6 Aluminum |
| Handguard | CMMG EML11 M-LOK, 11 inches |
| Muzzle Device | CMMG ZEROED Linear Compensator |
| Muzzle Thread | 5/8 x 24 |
| Charging Handle | CMMG ZEROED Ambi |
| Trigger | ZEROED Drop-In Single Stage |
| Trigger Guard | Integrated |
| Safety Selector | CMMG ZEROED 60/90 Degree (Ambi) |
| Pistol Grip | CMMG ZEROED Pistol Grip |
| Buffer Type | Carbine |
| Receiver Extension | CMMG 6 Position Fastback Extension |
| Brace | CMMG RipBrace |
| Finish | Cerakote Standard (Armor Black) |
| Included Magazine | One 20-round Magpul PMAG |
No. The Banshee Mk3 is built on the Mk3 platform (AR-10 size) based on the LR-308/DPMS Gen 1 high-pattern design, which is larger than AR-15. It uses full-size .308 Winchester components and is not compatible with standard AR-15 parts. However, it does share modularity within the AR-10/Mk3 ecosystem.
The Banshee Mk3 .308 Win 12.5 comes with one 20-round Magpul PMAG magazine. Additional magazines, ammunition, optics, and accessories are sold separately.
The muzzle is threaded 5/8x24, which is a common suppressor thread pitch for .308 Winchester. Suppressors are legal in most states with the proper federal registration and tax stamp. Always verify local and federal laws before purchasing or installing a suppressor.
The linear compensator directs muzzle blast forward and slightly reduces felt recoil, helping keep the pistol on target during rapid fire. The design is especially useful in short-barrel pistol configurations.
CMMG
The CMMG Banshee Mk3 308Win 12.5 Armor Black is a short-barrel .308 Winchester pistol built on CMMG's proven Mk3 platform—the AR-10 sized foundation that brings modern rifle modularity to a full-power rifle caliber in a compact, maneuverable package. If you've shot AR-15s and want the ballistic punch of .308 Win in a shorter form factor for hunting, home defense, or specialized shooting applications, the Banshee Mk3 delivers genuine stopping power without the length of a traditional rifle.
CMMG engineered this pistol around the LR-308/DPMS Gen 1 high-pattern design, meaning you get the ergonomic familiarity and parts compatibility that serious shooters expect. The 12.5-inch 4140CM chrome-moly barrel with a 1:10 twist is paired with a CMMG ZEROED linear compensator (5/8x24 threading) and mid-port gas system to manage recoil and keep the gun under control. Billet 7075-T6 aluminum receivers, an ambi charging handle, and a smooth single-stage trigger from CMMG's ZEROED line round out a purpose-built platform that respects your experience with modern tactical rifles.
Wrapped in Cerakote Standard finish, topped with an 11-inch CMMG EML11 M-LOK handguard for mounting optics and light, and sporting the CMMG RipBrace and a carbine-length buffer system, this 7.4-pound pistol strikes the balance between portability and shootability. It ships with a 20-round Magpul PMAG and measures 29.5 inches overall—a genuine alternative to full-size .308 rifles when you need something faster through tight spaces without sacrificing caliber or reliability.
| Brand | CMMG |
| Model | Banshee Mk3 |
| Caliber | .308 Winchester |
| Barrel Length | 12.5 inches |
| Barrel Material | 4140CM Chrome-Moly Steel |
| Barrel Twist | 1:10 |
| Barrel Contour | MT |
| Overall Length | 29.5 inches |
| Weight | 7.4 lbs |
| Gas System | Direct Impingement, mid-port |
| Gas Block | 0.750 Non-Adjustable |
| Upper Receiver | Billet 7075 T6 Aluminum |
| Lower Receiver | Mk3 Billet 7075 T6 Aluminum |
| Handguard | CMMG EML11 M-LOK, 11 inches |
| Muzzle Device | CMMG ZEROED Linear Compensator |
| Muzzle Thread | 5/8 x 24 |
| Charging Handle | CMMG ZEROED Ambi |
| Trigger | ZEROED Drop-In Single Stage |
| Trigger Guard | Integrated |
| Safety Selector | CMMG ZEROED 60/90 Degree (Ambi) |
| Pistol Grip | CMMG ZEROED Pistol Grip |
| Buffer Type | Carbine |
| Receiver Extension | CMMG 6 Position Fastback Extension |
| Brace | CMMG RipBrace |
| Finish | Cerakote Standard (Armor Black) |
| Included Magazine | One 20-round Magpul PMAG |
No. The Banshee Mk3 is built on the Mk3 platform (AR-10 size) based on the LR-308/DPMS Gen 1 high-pattern design, which is larger than AR-15. It uses full-size .308 Winchester components and is not compatible with standard AR-15 parts. However, it does share modularity within the AR-10/Mk3 ecosystem.
The Banshee Mk3 .308 Win 12.5 comes with one 20-round Magpul PMAG magazine. Additional magazines, ammunition, optics, and accessories are sold separately.
The muzzle is threaded 5/8x24, which is a common suppressor thread pitch for .308 Winchester. Suppressors are legal in most states with the proper federal registration and tax stamp. Always verify local and federal laws before purchasing or installing a suppressor.
The linear compensator directs muzzle blast forward and slightly reduces felt recoil, helping keep the pistol on target during rapid fire. The design is especially useful in short-barrel pistol configurations.
