# CMMG Banshee Mk4 .300 AAC Blackout 12.5in Midnight Bronze

**Brand:** CMMG
**Category:** AR Style Rifles
**Caliber:** .300 AAC Blackout

## Specifications

- **Caliber:** .300 AAC Blackout
- **Barrel Length:** 12.5"
- **UPC:** 810148623630
- **SKU:** UCEGJR3sM

## Description

The CMMG Banshee Mk4 is a .300 AAC Blackout semi-automatic AR-pattern pistol with a 12.5-inch threaded barrel and a Midnight Bronze finish. It ships with a 30+1 round capacity and includes the RipBrace configuration. The model designation is 30AB20F-MB.

### Key Specifications
- **Brand**: CMMG
- **Model**: Banshee Mk4
- **Caliber**: .300 AAC Blackout
- **Action**: Semi Auto
- **Capacity**: 30+1
- **Barrel Length**: 12.5 inches
- **Color/Finish**: Midnight Bronze

### Detailed Features
- 12.5-inch threaded barrel
- 30+1 round capacity
- RipBrace included
- Midnight Bronze finish
- AR-pattern Mk4 platform

## Frequently Asked Questions

**Q: What caliber is the Banshee Mk4?**

A: The Banshee Mk4 is chambered in .300 AAC Blackout.

**Q: Who makes the Banshee Mk4?**

A: The Banshee Mk4 is made by CMMG.

**Q: What type of firearm is the Banshee Mk4?**

A: It is a semi-automatic AR-pattern pistol on the Mk4 platform.

**Q: What is the barrel length of the Banshee Mk4?**

A: The Banshee Mk4 has a 12.5-inch threaded barrel.

**Q: Is the Banshee Mk4 barrel threaded?**

A: Yes, the Banshee Mk4 comes with a threaded barrel.

**Q: How many rounds does the Banshee Mk4 hold?**

A: It has a capacity of 30+1 rounds.

**Q: Does the Banshee Mk4 include a brace?**

A: Yes, the Banshee Mk4 ships with the RipBrace configuration.

**Q: Where can I buy the Banshee Mk4?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

Owners of the CMMG Banshee Mk4 in .300 AAC Blackout regularly point to the threaded 12.5-inch barrel as a practical choice for running a suppressor. The Midnight Bronze finish gets consistent positive comments for its appearance, though some note it shows wear at contact points over time.

The RipBrace receives mixed reactions. Shooters who want a compact, pistol-configured package use it as-is; others register the firearm as an SBR to install a conventional stock. The 12.5-inch barrel sits in a more practical length range than shorter PDW-style barrels, which reduces the harshness of the report with supersonic loads.

At its price, the Banshee Mk4 competes with other premium AR-pattern pistols. The CMMG Mk4 platform has a solid aftermarket, and .300 AAC Blackout ammunition availability has improved considerably. Some buyers note the Midnight Bronze finish commands a slight price premium over standard black configurations.

## Pricing

**5 offers available**

| Vendor | Price |
|--------|-------|
| Classicfirearms Com | $1400.14 |
| Shootingsurplus Com | $1442.00 |
| Buds Gun Shop | $1450.99 |
| Centerfiresystems Com | $1467.99 |
| Grabagun Com | $1479.99 |

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