CMMG Dissent BR4 (55A830B-AB) is a 5.56 NATO AR-style rifle with a 16.10″ Empire-profile, medium-taper unthreaded barrel, 10+1 capacity, 13.50″ M-LOK handguard and Magpul SGA stock.
The CMMG Dissent BR4 (part number 55A830B-AB) is an AR-platform rifle chambered for .223 Rem/5.56 NATO delivered with a 16.10″ Empire-profile, medium-taper, unthreaded barrel and a Magpul SGA black polymer stock. It ships with two 10-round Magpul PMags and is built to comply with restrictive-state configurations while retaining familiar AR ergonomics and controls. For an optic that pairs well without exceeding $1,000, consider a Vortex Strike Eagle 1-6×24 for close-to-mid-range versatility and robust performance.
Typical uses for this platform include range training and competitive/practical rifle matches that value reliable AR handling in restricted-capacity configurations. It also suits varmint/small-game field work where a compact, familiar AR setup is preferred.
Product Specifications
The manufacturer is CMMG.
The manufacturer’s part number is 55A830B-AB.
The caliber is .223 REM/5.56 NATO.
The barrel length is 16.10″.
The barrel uses an Empire profile unthreaded design with a medium taper.
The handguard length is 13.50″ M-LOK.
The receiver material is Aluminum.
The stock is a Magpul SGA black polymer unit.
The capacity is 10 + 1.
The rifle ships with (2) 10rd Magpul PMags.
The barrel rate of twist is 1:7″.
The trigger is a proprietary zeroed single-stage trigger.
The safety is a cross-bolt design.
The unloaded weight is 7.70 lbs.
The overall length is 36.70″.
The UPC is 840442502256.
The Dissent BR4 delivers a familiar AR control layout in a configuration intended for jurisdictions that require unthreaded barrels and restricted magazine capacities. It balances usable barrel length with a mid-weight profile and M-LOK handguard for accessory flexibility. If you want an AR that meets restrictive-state configurations without sacrificing modern ergonomics, this model presents a practical, well-equipped option.
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