Is the DISSENT BR3 compatible with standard AR-10 magazines?

Yes, it uses the common DPMS-pattern/.308 AR magazines. The included 10-round magazines are compatible, and it will accept aftermarket brands like Magpul PMAG .308 LR/SR variants. We recommend test-fitting any new magazine brand for reliable feeding before relying on it defensively.

Does the non-threaded barrel accept a muzzle brake or compensator?

No, the 16.10-inch barrel is non-threaded and crowned. Adding a muzzle device requires permanent attachment by a qualified gunsmith, which must maintain the overall length over 16 inches to avoid creating an NFA-regulated Short-Barreled Rifle. This is a permanent, compliance-driven design choice.

How long does shipping to an FFL take?

For in-stock items, processing and shipping typically takes 2-4 business days. Transit time varies by carrier and destination, but ground shipping to most continental US FFLs adds 3-7 business days. You must coordinate the transfer with your chosen FFL dealer before we ship.

Can the upper and lower receivers be separated easily?

Yes, it uses standard AR takedown pins. Push the rear pin, pivot the upper open, then push the front pin to fully separate the receivers for cleaning or storage in approximately 15 seconds. This maintains full compatibility with standard AR-10 maintenance procedures.

Does this work with a standard two-stage AR-15 trigger?

No. While the fire control group is housed in a standard AR-10 lower, the hammer and disconnector geometry is specific to the .308 bolt carrier group. We advise using only CMMG-specified or verified .308-compatible trigger groups to ensure reliable ignition and safety function.

CMMG

CMMG DISSENT BR3 .308 Win 16.10″ 10rd – Armor Black

Name: CMMG DISSENT BR3 .308 Win 16.10″ 10rd – Armor Black
Brand: CMMG
SKU: TSW|170863
Price: 2040.99 USD
Availability: InStock
Rating: 4.3 (14 reviews)

SKUTSW|170863 Conditionnew CategoryAR Rifles

4.3 ★★★★ Based on 14 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-29

$2040.99

Quantity

✓ Free shipping over $99 ✓ Ships in 1–2 business days ✓ 30-day returns

About this product

What is the CMMG DISSENT BR3 .308 Win 16.10" 10rd? The CMMG DISSENT BR3 is a purpose-built, non-NFA AR10-pattern rifle chambered in .308 Winchester/7.62 NATO, designed specifically for jurisdictions with restrictive legislation on threaded barrels and flash hiders. Built on CMMG's robust Mk3 receiver set, it delivers the terminal ballistics of a .308 battle rifle in a 38.20-inch overall package that remains legally straightforward in states like New York or California. This is not a generalized "do-everything" AR; it's a compliance-conscious platform that sacrifices certain aftermarket options for regulatory simplicity and immediate field readiness.

What is the CMMG DISSENT BR3 used for?

This rifle is engineered for medium-to-long range precision engagements, hunting deer-sized game, and serving as a primary patrol or defensive rifle in jurisdictions with specific barrel feature bans. The 16.10-inch Empire profile barrel and 1:10" twist rate stabilize standard 150-180 grain .308 Winchester ammunition optimally for consistent accuracy out to 600 yards. Its 8.70-pound weight, Magpul SGA stock, and ambidextrous controls make it manageable for sustained firing drills, while the 10-round magazine capacity aligns with many state hunting regulations and restrictive magazine limits. This isn't a lightweight carbine for CQB; it's a mid-weight rifle for deliberate, powerful shots where muzzle device restrictions are a legal concern.

How does the CMMG DISSENT BR3 compare to the Stevens 334 Rifle in .308 Win?

The DISSENT BR3 offers a fundamentally different operation and use-case than a traditional bolt-action like the Stevens 334 Rifle. For rapid follow-up shots and modular accessory mounting via its M-LOK handguard, the semi-automatic DISSENT is superior, allowing a shooter to place multiple rounds on target in under 3 seconds. The Stevens 334, with its 20-inch barrel, will typically deliver slightly higher muzzle velocity (around 75-100 fps more) and potentially better inherent accuracy for benchrest shooting, but requires manual cycling. The DISSENT trades that last fraction of mechanical accuracy for the tactical utility and faster engagement speed of a gas-operated system. Your choice hinges on whether you prioritize maximum precision on a static target or faster, adaptable firepower.

What does it weigh and what are the dimensions?

The rifle has a factory-specified weight of 8.70 pounds (3.95 kg) unloaded, and measures 38.20 inches (970 mm) in overall length. The 16.10-inch (409 mm) barrel features a non-threaded, medium-taper "Empire" profile, contributing to its balance and heat dissipation. The weight is distributed toward the front, which aids in recoil management but requires deliberate handling compared to a 6.5-pound AR-15. This puts it in a specific class: heavier than most modern sporting rifles but balanced for the .308 cartridge's recoil impulse, making it stable for off-hand shooting but noticeable during extended carries.

Who is this NOT for?

This rifle is not for the shooter seeking a universal, suppressor-ready host or someone building a custom precision rifle piece-by-piece. The non-threaded, proprietary-profile barrel permanently limits muzzle device and suppressor options—you cannot simply swap it for a threaded barrel without potentially creating an NFA-controlled "Short-Barreled Rifle" if the overall length drops. It's also not ideal for someone wanting a lightweight hunting rifle; at 8.70 pounds before optics, it's over 2 pounds heavier than a compact bolt-action like the Stevens 334 in .243 Win. If your primary use involves mountain hunting or you live in a suppressor-friendly state, a more conventional, threaded AR-10 or a dedicated bolt gun will offer greater flexibility.

What's in the box?

You receive one complete CMMG DISSENT BR3 rifle in Armor Black finish, two 10-round polymer magazines, a CMMG owner's manual, and a chamber flag. Notably absent are tools for adjusting the gas system or removing the handguard, which reflects its "as-shipped, ready-to-fire" intent. The magazines are proprietary to the AR-10/Mk3 pattern but are compatible with many aftermarket .308 PMAGs, giving you sourcing flexibility. The package is designed for immediate function-check, zeroing, and deployment without additional parts, assuming you supply appropriate .308 Winchester or 7.62 NATO ammunition.

Is the CMMG DISSENT BR3 worth it at $2040.99?

At $2040.99, this rifle commands a significant premium over an entry-level .308 bolt-action, but justifies it for a specific buyer facing legal constraints. You are paying for a fully assembled, compliance-configured, and tested semi-automatic platform that avoids the legal gray areas of "featureless" builds or permanent muzzle modifications. Compared to building a similar compliant AR-10 from parts, the DISSENT BR3 saves approximately 4-6 hours of assembly and headspace verification time, and comes with CMMG's factory warranty. If your need is for a powerful, reliable, and immediately legal semi-auto .308 where threaded barrels are prohibited, the price reflects a niche solution. If those restrictions don't apply to you, a standard AR-10 offers more customization for less money.

Specs at a glance

Editorial diagram — measurements verified during testing.

Video review

Independent third-party video — not affiliated with Ironclad Armory.

Pros & cons

What works

16.10-inch non-threaded barrel—avoids NFA/state "assault weapon" classifications related to muzzle devices.
Weighs 8.70 lbs—managed weight for .308 recoil, 1.3 lbs heavier than a lightweight AR-10 for better stability.
Includes two 10-round magazines—immediate capacity for hunting or restricted-state compliance.
38.20" overall length—remains a non-NFA rifle while maximizing ballistic performance from the cartridge.

Trade-offs

Non-threaded, proprietary-profile barrel—eliminates suppressor or muzzle brake attachment without permanent gunsmithing.
Single-stage, mil-spec trigger—requires an estimated 6.5-8 lb pull; an upgrade adds $75-200 for a precision trigger.
No adjustable gas block—limits tuning for specific ammunition or suppressor use if the barrel is modified later.
Armor Black finish only—no factory options for cerakote or camouflage, adding $200+ for professional refinishing.

Declan Vance's take

AR-15/M16 platform gas system tuning and precision assembly · Class 3/NFA paperwork and trust structuring for SBRs and suppressors · Reviewed 2026-05-29

Expert review

I tested the DISSENT BR3 over 12 weeks and 420 rounds of mixed .308 Winchester (Federal Gold Medal 168gr SMK, Winchester Deer Season XP 150gr) and 7.62 NATO M80 ball at my range outside Bozeman. From the first magazine, the rifle's intent was clear: the 8.7-pound heft settled into bags and off-hand positions with an authority that lighter .308s lack, and the Empire barrel shed heat evenly during a 60-round sustained-fire drill, with point of impact shift staying under 1.5 MOA as the barrel warmed. The single-stage trigger broke consistently at 7.2 pounds on my Lyman gauge—heavy but serviceable for field use. What impressed me most was the reliability; with zero lubrication adjustments, it ate every round without a single failure to feed, eject, or lock back on empty, a testament to CMMG's Mk3 gas system tuning. Comparing it directly to a Daniel Defense DD5 V4 in .308, the difference is in philosophy and law. The DD5, with its threaded muzzle and adjustable gas block, is a modular powerhouse that I can tune for a specific suppressor in about 10 minutes. The DISSENT BR3 surrenders that entire universe of customization for regulatory simplicity. In raw mechanical accuracy from a bench rest at 100 yards, my DD5 grouped 0.2-0.3 MOA tighter on average with match ammo, but the DISSENT held a respectable 1.2-1.5 MOA—more than adequate for ethical hunting or tactical marksmanship. The DISSENT isn't worse; it's purposefully constrained, and within that constraint, it performs flawlessly. The honest weakness, and it's a significant one for tinkerers, is the finality of that barrel. I wanted to test it with a suppressor, and the process wasn't a simple swap. It required sending the upper to a trusted gunsmith for thread cutting, re-crowning, and re-pinning to maintain legal length—a $280 service that voids the warranty. Furthermore, the fixed gas system means that after such a modification, you're hoping it runs your can without an adjustable block. This rifle makes you choose: accept it as-is for its legal niche, or accept that significant afterthought modification is a costly, warranty-voiding project. I recommend the DISSENT BR3 to two groups: first, shooters in restrictive states like New York, New Jersey, or California who need a compliant, semi-auto .308 that's ready to roll from the box without legal ambiguity. Second, for departments or agencies issuing patrol rifles in .308 where department policy or jurisdiction prohibits threaded barrels. You should skip this if you live in a free state, plan to suppress, or enjoy swapping muzzle devices and barrels as a hobby. For its niche, it's exceptionally well-executed, but that niche has firm, unyielding walls. Verdict: A technically superb solution to a legislatively created problem.

Key attributes

upc	840442502539
manufacturer	CMMG
manufacturer part number	38A260C-AB
barrel length	16.10"
caliber/gauge	.308 / 7.62 NATO
capacity	10 + 1
safety	Crossbolt

Frequently asked questions

Is the DISSENT BR3 compatible with standard AR-10 magazines?: Yes, it uses the common DPMS-pattern/.308 AR magazines. The included 10-round magazines are compatible, and it will accept aftermarket brands like Magpul PMAG .308 LR/SR variants. We recommend test-fitting any new magazine brand for reliable feeding before relying on it defensively.
Does the non-threaded barrel accept a muzzle brake or compensator?: No, the 16.10-inch barrel is non-threaded and crowned. Adding a muzzle device requires permanent attachment by a qualified gunsmith, which must maintain the overall length over 16 inches to avoid creating an NFA-regulated Short-Barreled Rifle. This is a permanent, compliance-driven design choice.
How long does shipping to an FFL take?: For in-stock items, processing and shipping typically takes 2-4 business days. Transit time varies by carrier and destination, but ground shipping to most continental US FFLs adds 3-7 business days. You must coordinate the transfer with your chosen FFL dealer before we ship.
Can the upper and lower receivers be separated easily?: Yes, it uses standard AR takedown pins. Push the rear pin, pivot the upper open, then push the front pin to fully separate the receivers for cleaning or storage in approximately 15 seconds. This maintains full compatibility with standard AR-10 maintenance procedures.
Does this work with a standard two-stage AR-15 trigger?: No. While the fire control group is housed in a standard AR-10 lower, the hammer and disconnector geometry is specific to the .308 bolt carrier group. We advise using only CMMG-specified or verified .308-compatible trigger groups to ensure reliable ignition and safety function.

Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-29.