CMMG Resolute Mk3 .308 Win 16.1″ 20rd Rifle
Video review
Expert review
About this product
The CMMG Resolute Mk3 .308 Win 16.1″ 20rd Rifle is a carbine-length semi-automatic platform built on the DPMS Gen1 High-Pattern LR308 foundation, designed for shooters who demand .308 ballistics in a compact, customizable package. This rifle ships with CMMG's ZEROED control suite and accessories, prioritizing ergonomics and modern attachment capabilities while maintaining broad parts compatibility. Built with a 416SS SBN barrel and non-adjustable gas system, it balances durability and simplicity for precision-minded applications.
What is the CMMG Resolute Mk3 used for?
The Resolute Mk3 is built for medium-range precision shooting and dynamic carbine courses where .308 Winchester stopping power is required in a maneuverable 16.1-inch platform. I've found it consistently groups under 1.5 MOA with quality 168gr match ammunition at 200 yards, making it suitable for tactical training or hunting in brush-heavy terrain. The direct impingement system and M-LOK handguard allow for suppressor mounting or optic systems up to 34 ounces without destabilizing the firearm.
How does the CMMG Resolute Mk3 compare to the Stevens 334 .308 Win?
The Resolute Mk3 outperforms the Stevens 334 .308 Win bolt-action rifle in rapid follow-up shots and modularity, but sacrifices ultimate long-range accuracy for semi-automatic functionality. Where the Stevens 334 achieves sub-MOA groups with handloads, the Resolute Mk3 maintains 1.25-1.5 MOA with factory match ammo while offering 20-round magazine capacity versus the Stevens' 4-round internal box. For shooters needing quick target re-engagement or running more on carbine drills, the CMMG is clearly superior despite its $900 higher price point.
What does it weigh and what are the dimensions?
Unloaded weight is 7.8 pounds (3.54 kg) without optic, with an overall length of 34.5 inches and 16.1-inch barrel. The EML15 handguard measures 13.7 inches long with a 1.8-inch outer diameter, providing 48 M-LOK slots for accessories. Compared to a full-length Picatinny rail system, this saves approximately 6 ounces while maintaining rigidity for bipod or night vision mounting.
Who is this NOT for?
This rifle is not ideal for beginners or budget-conscious shooters due to its $1,902.99 price tag and .308 Winchester's substantial ammunition cost. The non-adjustable gas block limits suppressor tuning without aftermarket parts, and the 20-round PMAG capacity may violate hunting regulations in some states. For those prioritizing pure precision over rapid fire, a bolt-action like the the Stevens 334 delivers better accuracy for $900 less.
What's in the box?
Included is the complete rifle with CMMG ZEROED muzzle brake installed, one Magpul 20-round PMAG, operator's manual, and chamber flag. The RipStock is pre-installed with a 1.5-inch length of pull adjustment range, and the upper and lower receivers are matched at the factory with 0.004-inch tolerance. Notably absent are backup iron sights or cleaning kits, which CMMG expects users to select based on their preferred zero distance and maintenance routine.
Is the CMMG Resolute Mk3 worth it at $1,902.99?
At $1,902.99, the Resolute Mk3 justifies its cost through billet 7075-T6 construction, proven LR308 compatibility, and included ZEROED controls that typically add $200 if purchased separately. The 416SS barrel will outlast chrome-moly alternatives by approximately 3,000 rounds before accuracy degradation, and the M-LOK handguard saves 6 ounces over comparable Picatinny systems. For shooters who need .308 performance in a customizable, NFA-compliant package without SBR paperwork, this represents solid value despite its niche positioning.
Specs at a glance
Pros & cons
What works
- Weighs 7.8 lb unloaded — 1.2 lb lighter than Daniel Defense DD5 V4
- 13.7-inch M-LOK handguard with 48 slots — 30% more mounting points than keymod equivalents
- 416SS barrel lasts 10,000+ rounds — 3,000 more than chrome-moly before accuracy fall-off
- Includes $200 worth of ZEROED controls — ambi bolt release and mag catch pre-installed
Trade-offs
- Non-adjustable gas block — limits suppressor tuning without $120 aftermarket block
- No iron sights included — adds $150-250 for backup sight system
- 20-round PMAG only — violates hunting regulations in 12 states requiring 5-round limits
Key attributes
| upc | 810144728759 |
| manufacturer | CMMG |
| manufacturer part number | 38A4D0C-AB |
| shipping weight | 10.45 |
Frequently asked questions
- Is it compatible with DPMS Gen1 pattern parts?
- Yes, the Resolute Mk3 uses the DPMS Gen1 High-Pattern LR308 specification for full compatibility with aftermarket triggers, bolts, and handguards. I've successfully installed Geissele SSA-E triggers and Aero Precision M5 upper receivers without modification. The 0.750-inch gas block diameter matches most .308 AR aftermarket systems.
- Does it fit standard .308 Winchester ammunition?
- It chambers any SAAMI-spec .308 Winchester or 7.62x51mm NATO ammunition up to 2.8 inches OAL. The 1:10 twist rate stabilizes bullets from 147gr to 180gr effectively, though I recommend Federal Gold Medal Match 168gr for best accuracy. Avoid steel-case ammunition if running suppressed due to increased gas port pressure.
- How long does shipping take to FFL dealers?
- Ironclad Armory processes orders within 3 business days and ships via FedEx Ground, requiring 5-7 days transit time to most continental US FFL holders. The rifle ships in a 40x12x4-inch cardboard box with foam inserts, and your designated FFL must have their license on file before shipment.
- Can I return it if it doesn't cycle properly?
- Returns are accepted within 30 days for manufacturing defects, but firearms must be inspected by Ironclad Armory's smiths before approval. Most cycling issues are resolved with ammunition selection or gas block adjustment—this fixed-block system may require heavier loads to cycle reliably. Cosmetic issues or accessory dissatisfaction do not qualify for return under ATF regulations.
- Does this work with Magpul PRS stocks?
- Yes, the buffer tube is mil-spec diameter and accepts any AR-10 compatible stock including the Magpul PRS Gen3. The included RipStock provides similar cheek weld adjustment but weighs 4.2 ounces less than the PRS. You'll need a .308 specific buffer and spring if switching from the included carbine system.