# CMMG Banshee MK3 .308 Win 12.5in

**Brand:** CMMG
**Category:** AR Style Rifles
**Caliber:** .308 Win

## Specifications

- **Caliber:** .308 Win
- **Barrel Length:** 12.5"
- **UPC:** 810046237489
- **SKU:** UCEGCVSYz

## Description

The CMMG Banshee MK3 is an AR-pattern semi-automatic rifle chambered in .308 Win with a 12.5-inch barrel; this short-barreled configuration requires additional federal paperwork for transfer. It ships with a linear compensator and a 20-round magazine. The MK3 platform uses CMMG's large-frame AR architecture scaled for .308 Win.

### Key Specifications
- **Brand**: CMMG
- **Model**: Banshee MK3
- **Caliber**: .308 Win
- **Action**: Semi Auto
- **Barrel Length**: 12.5 inches
- **Capacity**: 20 rounds

### Detailed Features
- 12.5-inch barrel in a short-barreled configuration (additional federal paperwork required)
- Linear compensator included
- 20-round magazine capacity
- AR-pattern large-frame platform chambered in .308 Win

## Frequently Asked Questions

**Q: What caliber is the Banshee MK3?**

A: The CMMG Banshee MK3 is chambered in .308 Win.

**Q: Who makes the Banshee MK3?**

A: The Banshee MK3 is made by CMMG.

**Q: What type of firearm is the Banshee MK3?**

A: It is a semi-automatic AR-pattern rifle built on CMMG's large-frame MK3 platform.

**Q: What is the barrel length of the Banshee MK3?**

A: The Banshee MK3 has a 12.5-inch barrel.

**Q: How many rounds does the Banshee MK3 hold?**

A: It ships with a 20-round magazine.

**Q: Does the Banshee MK3 come with a muzzle device?**

A: Yes, it includes a linear compensator.

**Q: Where can I buy the Banshee MK3?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

Owners of the Banshee MK3 in .308 Win are typically drawn to the compactness of a full-power rifle cartridge in a short-barreled format. Build quality is consistently praised, and most owners find the CMMG platform runs reliably with standard .308 Win ammunition. The included linear compensator addresses blast direction but does not reduce concussion significantly at this barrel length, which is a noted trade-off for indoor or covered-range use.

The 12.5-inch barrel does reduce velocity compared to full-length .308 Win rifles, and owners who prioritize terminal ballistics at distance tend to note this. For close to mid-range applications, the trade-off is generally considered acceptable. The overall weight with the MK3 large frame is not light, and some owners swap to lighter handguards to manage it.

Value relative to other short .308 Win platforms is the main point of debate. The Banshee MK3 costs more than comparable-length budget builds, but owners who prioritize CMMG's fit and finish tend to view the premium as justified. Parts availability and the familiar AR manual of arms are recurring reasons owners stick with this platform over alternatives.

## Pricing

**1 offers available**

| Vendor | Price |
|--------|-------|
| Guns Com | $1799.99 |

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*Data from [GunsNation](https://gunsnation.com)*