CMMG Banshee MK4 5.56 AR Pistol

$1,577.00

5 in stock

Compact 5.56 AR Pistol, optimized for close-quarters engagement and rapid deployment. Features a 10.5-inch barrel.

Purchase & earn 15,770 CashBack Credits!
Buy it now
SKU: RSR|CMMG55A420A-AB

CMMG Banshee MK4 5.56 AR Pistol: Precision Compact Utility

The CMMG Banshee MK4 5.56 AR Pistol is engineered for professionals and serious enthusiasts who require a compact, reliable, and high-performance firearm. Built on the proven AR-15 platform, this MK4 variant is chambered in 5.56x45mm NATO, providing robust terminal performance from a highly maneuverable package. The 10.5-inch barrel configuration, coupled with CMMG’s commitment to quality manufacturing, ensures consistent cycling and effective ballistic characteristics for close-quarters applications and rapid deployment scenarios.

Key Features

Optimized Compact Form Factor

The 10.5-inch 4140 Chrome Moly Vanadium steel barrel provides a critical balance between overall length and muzzle velocity retention for the 5.56 NATO cartridge. This barrel length significantly enhances maneuverability in confined spaces, making it suitable for vehicle operations, home defense, or as a compact sporting platform. The barrel features a Salt Bath Nitride (SBN) finish for superior corrosion resistance and enhanced service life.

Robust Direct Impingement System

Utilizing a carbine-length direct impingement gas system, the Banshee MK4 5.56 maintains the reliability and familiarity of the standard AR-15 architecture. This system is proven for consistent operation and ease of maintenance, ensuring dependable performance under demanding conditions. The gas port is precisely sized to optimize cycling with a broad range of 5.56 NATO and .223 Remington ammunition.

Precision Machined Receivers

Both the upper and lower receivers are precision machined from 7075-T6 billet aluminum, providing a rigid and durable foundation for the firearm. The billet construction enhances structural integrity compared to forged counterparts, ensuring a consistent interface between components. Finished with a durable Cerakote Armor Black coating, these receivers offer advanced protection against abrasion, corrosion, and chemical exposure.

Integrated Ergonomics and Control

The Banshee MK4 integrates a CMMG RML7 M-LOK handguard, offering versatile accessory attachment points for lights, lasers, and grips without adding unnecessary bulk. The firearm is equipped with a CMMG RipBrace, providing a compact, rapidly deployable, and adjustable brace solution that enhances stability and control. A CMMG ZEROED pistol grip and mil-spec single-stage trigger complete the control interface, delivering predictable manipulation and a consistent pull.

Technical Specifications

Platform

  • Caliber: 5.56x45mm NATO
  • System: Direct Impingement, Carbine Length Gas
  • Receiver: CMMG Mk4 Forged 7075-T6 Billet Aluminum, Cerakote Armor Black

Barrel

  • Length: 10.5 inches
  • Material: 4140 Chrome Moly Vanadium Steel
  • Finish: Salt Bath Nitride (SBN)
  • Twist Rate: 1:7 RH
  • Muzzle Device: A2 Flash Hider
  • Gas Block: Low Profile, Fixed

Components

  • Handguard: CMMG RML7 M-LOK, 7-inch
  • Pistol Brace: CMMG RipBrace, 6-Position
  • Grip: CMMG ZEROED Pistol Grip
  • Trigger: CMMG Mil-Spec Single Stage
  • Magazine: (1) 30-round Magpul PMAG

Dimensions

  • Weight: 5.5 lbs (unloaded)
  • Overall Length: 24.5 inches (collapsed) / 27.2 inches (extended)
UPC

810148624231

Manufacturer

CMMG

Manufacturer Part Number

55A420A-AB

Barrel Length

10.5000

Caliber/Gauge

.223 REM/5.56 NATO

Number of Magazines

1

Length

39.7000

Capacity

30

State Restriction (RI)

NO DIRECT SHIP TO RHODE ISLAND

State Restriction (WA)

NO DIRECT SHIP TO WASHINGTON

State Restriction (IL)

NO SALE TO ILLINOIS PICA

Action

Semi-Auto

Sights Type

NONE

Model

Banshee

Safety

Ambidextrous

Sights

Optics Ready

Product Type

AR

Search for products

Back to Top
Product has been added to your cart