The CMMG Banshee 300 Mk4 9mm is a compact Banshee configuration built around CMMG’s Mk4 platform and Radial Delayed Blowback operating system. Chambered in 9mm Luger, this configuration features a 5-inch 4140CM Salt Bath Nitride barrel with a 1/2×28 threaded muzzle and a CMMG RML4 M-LOK handguard. The forged 7075-T6 aluminum upper and lower receivers are paired with an oversized ambidextrous charging handle, ambidextrous safety selector, Magpul MOE grip and CMMG Micro/CQB RipBrace. The configuration includes a 30-round 9ARC magazine and weighs approximately 4 pounds 6 ounces unloaded. CMMG identifies the Mk4 as one of the Banshee platforms available in 9mm.
Features
- 9mm Luger chambering
- 5-inch 4140CM Salt Bath Nitride barrel
- 1/2×28 threaded muzzle with thread protector
- CMMG RML4 M-LOK handguard
- Forged 7075-T6 aluminum upper and lower receivers
- CMMG oversized ambidextrous charging handle
- CMMG ambidextrous safety selector
- CMMG single-stage Mil-Spec-style trigger
- Magpul MOE pistol grip and trigger guard
- CMMG Micro/CQB RipBrace
- 30-round 9ARC magazine
- Cerakote finish
- Approximately 4 lb 6 oz unloaded
- 18.9-inch length with brace collapsed
Product Information
| Specification | Details |
|---|---|
| Cartridge | 9mm Luger |
| Capacity | 30+1 Round |
| Magazine Quantity | 1 |
| Weight | 4 lb 6 oz Unloaded |
| Barrel Length | 5 Inches |
| Barrel Material | 4140CM |
| Barrel Finish | Black Salt Bath Nitride |
| Threads | 1/2×28 |
| Action Type | Semi-Automatic |
| Operating System | Radial Delayed Blowback |
| Trigger Type | Single Stage |
| Safety | Ambidextrous Selector |
| Threaded Muzzle | Yes |
| Handguard | CMMG RML4 M-LOK |
| Receiver Material | Forged 7075-T6 Aluminum |
| Grip Material | Polymer |
| Grip Style | Overmolded |
| Grip Color | Black |
| Compensated | No |
| Country of Origin | United States of America |




