CMMG Dissent BR4 5.56 NATO – 16.1" Barrel, 10+1, Black Armor Cerakote, 13.5" M-LOK Handguard, Magpul SGA Stock – 55A830B-AB (UPC: 840442502256)
Transform your idea of a modern AR-style rifle with the CMMG Dissent BR4 5.56 NATO 10+1 – model 55A830B-AB, UPC 840442502256. Built around CMMG’s cutting-edge Dissent platform, this rifle features a 16.10" medium taper barrel with black nitride finish, a rugged Black Armor Cerakote aluminum receiver with full-length Picatinny rail, a long 13.50" M-LOK® handguard, and a Magpul SGA black polymer stock for excellent ergonomics and recoil control.
Chambered in 5.56 NATO and accepting standard AR magazines, the Dissent BR4 delivers outstanding reliability, soft recoil, and modularity—perfect for tactical training, defensive use, range days, and competition-style shooting.
5.56 NATO Performance with a 16.10" Medium Taper Barrel
At the heart of this rifle is a 16.10" medium taper barrel optimized for durability, balance, and accuracy:
Caliber: 5.56 NATO (also compatible with .223 Remington when using appropriate ammunition)
Barrel Length: 16.10" – the sweet spot for maximizing 5.56 performance while staying maneuverable
Profile: Medium taper for improved rigidity and heat control over lightweight profiles
Finish: Black nitride for enhanced corrosion resistance, extended barrel life, and easier cleaning
This barrel setup gives you a dependable, accurate rifle that can handle sustained fire and varied roles—from bench shooting to dynamic drills.
Black Armor Cerakote Aluminum Receiver with Picatinny Rail
Durability and modularity define the Dissent BR4’s receiver set:
Receiver Material: High-quality aluminum for strength and weight savings
Finish: Black Armor Cerakote, a rugged protective coating that resists wear, scratches, and harsh weather
Top Rail: Full-length Picatinny rail along the upper for easy mounting of optics, backup iron sights, and accessories
This robust receiver setup gives you a rock-solid foundation for whatever optics system you prefer—LPVO, red dot, magnifier combo, or traditional scope.
13.50" M-LOK Handguard – Lightweight, Rigid, Accessory-Ready
The rifle features a long, slim 13.50" free-floating M-LOK handguard that provides plenty of space for accessories without adding unnecessary bulk:
Free-float design for improved accuracy and consistent barrel harmonics
M-LOK® slots at multiple positions for attaching lights, lasers, bipods, vertical grips, or hand stops
Extended 13.5" length gives you more reach and flexibility for modern support-hand shooting positions
Keeps weight forward but manageable, helping control muzzle rise and track targets smoothly
This handguard is built with the modern shooter in mind—minimal, modular, and mission-ready.
Magpul SGA Black Polymer Stock – Enhanced Ergonomics & Control
Instead of a basic stock, this CMMG Dissent BR4 is equipped with a proven Magpul SGA-style black polymer stock:
Ergonomic design offers a solid cheek weld and comfortable shoulder mount
Durable polymer construction resists impact and environmental abuse
Designed to give you better control, quicker target transitions, and more comfort during long shooting sessions
Paired with the medium taper barrel and M-LOK handguard, the Magpul SGA stock helps this rifle feel planted and controllable in virtually any position.
10+1 Capacity with Standard AR Controls
The CMMG Dissent BR4 5.56 retains familiar AR-style ergonomics for intuitive manipulation:
Capacity: 10+1 rounds (10-round magazine configuration – ideal for restricted states or hunters where capacity limits apply)
Uses standard AR-15 pattern magazines, making spares and upgrades easy to find
Traditional AR-style controls (safety selector, magazine release, charging system style dependent on Dissent configuration) for a familiar manual of arms
Whether you run ARs every day or are just getting started, the control layout feels natural, and the 10-round configuration suits both compliance and precision-focused shooters.
Balanced, Modern Rifle for Defense, Training & Competition
Every feature on this Dissent BR4 5.56 NATO 16.10" is tailored to serious use:
Home & personal defense: Reliable 5.56 platform with enhanced handling and accessory-ready rail/handguard
Professional / tactical training: Durable finish, quality barrel, and modern furniture support extended, high-round-count classes
Competition-style shooting & range work: Medium taper barrel and free-float M-LOK handguard help with accuracy and quick follow-up shots
General-purpose carbine: From steel targets to varmints, this configuration adapts quickly with a simple optic or accessory change
It’s a do-it-all modern rifle platform with the looks and performance to match.
Key Features – CMMG Dissent BR4 5.56 NATO 16.10" 55A830B-AB
Manufacturer: CMMG
Model: Dissent BR4
SKU / Part Number: 55A830B-AB
UPC: 840442502256
Caliber: 5.56 NATO (accepts .223 Rem with appropriate ammo)
Capacity: 10+1 rounds
Barrel Length: 16.10" medium taper barrel
Barrel Finish: Black nitride
Receiver: Aluminum receiver
Receiver Finish: Black Armor Cerakote with Picatinny top rail
Handguard: 13.50" free-floating M-LOK® handguard
Stock: Magpul SGA black polymer stock
Color Scheme: Overall black tactical finish for a sleek, professional look
Why Choose the CMMG Dissent BR4 5.56 NATO 16.10" (55A830B-AB)?
Choose the CMMG Dissent BR4 5.56 NATO 10+1 16.10" Black Nitride Black Armor Cerakote – 55A830B-AB (UPC 840442502256) if you want:
A modern, modular 5.56 rifle with premium barrel and finish quality
A long 13.50" M-LOK handguard for maximum accessory flexibility and modern shooting technique
A rugged Black Armor Cerakote aluminum receiver with full-length Picatinny rail for optics
Comfortable, proven ergonomics with a Magpul SGA stock and AR-style controls
From defensive readiness to range performance, this Dissent BR4 configuration gives you a feature-rich, reliable, and aesthetically sharp 5.56 NATO rifle you’ll be proud to run and show off.
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