Compact, reliable, and purpose-built rifles that bring big-bore performance to an AR-style chassis are in demand for precision work, hunting, and tactical roles where energy on target matters. A modern direct-impingement design that eliminates the traditional buffer tube opens configuration options while retaining the familiar AR ergonomics and controls.

CMMG DISSENT BR4 [AB] is CMMG’s Compact Action rifle optimized for Hornady’s .338 ARC cartridge in a package that uses the company’s patented bufferless receiver. The DISSENT Br4 leverages the Compact Action system to provide direct impingement operation without a buffer tube assembly and ships with a Magpul SGA stock for 870 shotguns fitted to this platform for a distinctive ergonomic profile. New for 2025, the platform pairs a 16.1-inch barrel with an Armor Black Cerakote finish and includes one 10-round magazine at a manufacturer price of $1699.99. Shop this product

Design and key features

The heart of the rifle is CMMG’s patented bufferless receiver and Compact Action system. Removing the buffer tube allows traditional rifle-style stocks and more flexibility in length-of-pull and accessory mounting. The direct impingement gas system is tuned for reliable cycling with .338 ARC while avoiding the extra complexity of piston conversions. The included Magpul SGA stock—adapted here for an AR-style platform—offers a proven ergonomic shape for consistent shoulder indexing.

Hardware and finish

This model’s 16.1-inch barrel balances compact handling with ballistic performance for .338 ARC loads. The Armor Black Cerakote finish adds durable corrosion resistance and low-glare appearance for field use. One 10-round magazine is supplied, making the package ready to field upon purchase. View product details and pricing

Ballistics and practical applications

Hornady’s .338 ARC is engineered to deliver significantly more energy on target than common medium-bore rounds while preserving the subsonic/supersonic flexibility shooters value from the .300 BLK family. For hunters and precision shooters, the cartridge reduces the need for gas-system adjustments when moving between suppressed and unsuppressed configurations, simplifying setup in the field. The 16.1-inch barrel retains good velocity in a compact package suitable for shorter-range precision and medium-game applications.

Why choose this rifle

For shooters who want AR-style controls with large-bore terminal performance, the DISSENT Br4 brings a practical combination of CMMG innovation and Hornady’s .338 ARC ballistics. The bufferless receiver, Compact Action system, 16.1-inch barrel, Armor Black Cerakote finish, and included 10‑round magazine make it a turnkey option at $1699.99. Check current availability

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