Availability: In Stock
The CMMG Banshee 100 Mk3 LR-308 pistol upper receiver assembly delivers serious .308 Winchester firepower in a compact, maneuverable package. Built on the proven DPMS Gen 1 high-pattern LR308 platform, this 12.5" barreled upper gives you genuine rifle capability without the bulk—ideal for shooters who need a hard-hitting .308 AR10 build that doesn't feel like a full-length rifle. Whether you're assembling a truck gun, a short-range ranch setup, or a compact defensive platform, the Banshee Mk3 lets you chamber a potent round in a form factor that actually fits real-world carry and handling.
This is a complete upper assembly, not a bare receiver. It ships zeroed and ready to mount on a compatible LR308 lower—the bolt carrier group, charging handle, dust cover, and compensator are all included and factory set. The 12.5" barrel wears a 1:10 twist and 4140CM steel for durability, while the billet 7075 T6 aluminum upper receiver and M-LOK handguard keep weight reasonable and mounting options flexible. The CMMG ZEROED linear compensator threads at 5/8x24 to manage what would otherwise be a snappy report from a short .308 pistol.
Direct impingement operation and a non-adjustable 0.750" gas block keep the system simple and reliable. Mid-length gas porting balances reliability with the shorter barrel, and the ambi charging handle works cleanly from either shoulder. Cerakote finish protects against the elements. At 5.1 lbs and 22.2" in overall length, this upper won't dominate your setup—it'll just hit hard and handle fast.
| Caliber | .308 Winchester |
| Barrel Length | 12.5" |
| Barrel Twist | 1:10 |
| Barrel Material | 4140CM SBN steel |
| Barrel Contour | MT |
| Upper Receiver | Billet 7075 T6 aluminum |
| Upper Pattern | DPMS Gen 1 LR308 (Mk3 platform) |
| Handguard | CMMG EML11 M-LOK |
| Muzzle Device | CMMG ZEROED Linear Compensator, 5/8x24 thread |
| Gas Block | 0.750" non-adjustable |
| Gas Port | Mid-length |
| Charging Handle | CMMG ZEROED ambidextrous |
| Operating System | Direct impingement |
| Finish | Cerakote standard |
| Weight | 5.1 lbs |
| Overall Length | 22.2" |
| Included | Bolt carrier group, ambi charging handle, polymer dust cover, linear compensator—all zeroed |
The Banshee Mk3 is built on the DPMS Gen 1 high-pattern LR308 platform, so it's compatible with any lower receiver designed for that pattern, including CMMG's own Mk3 lowers and most aftermarket DPMS Gen 1 LR308 lowers. Always verify lower compatibility before purchase.
Yes. This is a complete upper assembly that ships with the bolt carrier group, charging handle, dust cover, and compensator all installed and factory zeroed. You attach it to your compatible LR308 lower and you're ready to go.
The compensator is threaded at 5/8x24 and can be swapped for another muzzle device, though no specific removal method or compatibility guidance is provided in the product data.
The short barrel keeps the overall platform compact and maneuverable—critical for truck guns, close-range ranch work, and defensive AR10 builds—while the 1:10 twist and direct impingement system help you maintain reliable function despite the reduced barrel length.
SKU: 115809603 • Weight: 3oz
Availability: In Stock
The CMMG Banshee 100 Mk3 LR-308 pistol upper receiver assembly delivers serious .308 Winchester firepower in a compact, maneuverable package. Built on the proven DPMS Gen 1 high-pattern LR308 platform, this 12.5" barreled upper gives you genuine rifle capability without the bulk—ideal for shooters who need a hard-hitting .308 AR10 build that doesn't feel like a full-length rifle. Whether you're assembling a truck gun, a short-range ranch setup, or a compact defensive platform, the Banshee Mk3 lets you chamber a potent round in a form factor that actually fits real-world carry and handling.
This is a complete upper assembly, not a bare receiver. It ships zeroed and ready to mount on a compatible LR308 lower—the bolt carrier group, charging handle, dust cover, and compensator are all included and factory set. The 12.5" barrel wears a 1:10 twist and 4140CM steel for durability, while the billet 7075 T6 aluminum upper receiver and M-LOK handguard keep weight reasonable and mounting options flexible. The CMMG ZEROED linear compensator threads at 5/8x24 to manage what would otherwise be a snappy report from a short .308 pistol.
Direct impingement operation and a non-adjustable 0.750" gas block keep the system simple and reliable. Mid-length gas porting balances reliability with the shorter barrel, and the ambi charging handle works cleanly from either shoulder. Cerakote finish protects against the elements. At 5.1 lbs and 22.2" in overall length, this upper won't dominate your setup—it'll just hit hard and handle fast.
| Caliber | .308 Winchester |
| Barrel Length | 12.5" |
| Barrel Twist | 1:10 |
| Barrel Material | 4140CM SBN steel |
| Barrel Contour | MT |
| Upper Receiver | Billet 7075 T6 aluminum |
| Upper Pattern | DPMS Gen 1 LR308 (Mk3 platform) |
| Handguard | CMMG EML11 M-LOK |
| Muzzle Device | CMMG ZEROED Linear Compensator, 5/8x24 thread |
| Gas Block | 0.750" non-adjustable |
| Gas Port | Mid-length |
| Charging Handle | CMMG ZEROED ambidextrous |
| Operating System | Direct impingement |
| Finish | Cerakote standard |
| Weight | 5.1 lbs |
| Overall Length | 22.2" |
| Included | Bolt carrier group, ambi charging handle, polymer dust cover, linear compensator—all zeroed |
The Banshee Mk3 is built on the DPMS Gen 1 high-pattern LR308 platform, so it's compatible with any lower receiver designed for that pattern, including CMMG's own Mk3 lowers and most aftermarket DPMS Gen 1 LR308 lowers. Always verify lower compatibility before purchase.
Yes. This is a complete upper assembly that ships with the bolt carrier group, charging handle, dust cover, and compensator all installed and factory zeroed. You attach it to your compatible LR308 lower and you're ready to go.
The compensator is threaded at 5/8x24 and can be swapped for another muzzle device, though no specific removal method or compatibility guidance is provided in the product data.
The short barrel keeps the overall platform compact and maneuverable—critical for truck guns, close-range ranch work, and defensive AR10 builds—while the 1:10 twist and direct impingement system help you maintain reliable function despite the reduced barrel length.
SKU: 115809603 • Weight: 3oz