Diamondback DB10 .308 Win 16″ M-LOK Rifle
Video review
Expert review
About this product
The Diamondback DB10 is a semi-automatic AR-10 platform rifle chambered in .308 Winchester, built with forged 7075-T6 aluminum receivers and a 16-inch nitride-treated barrel. It targets shooters who need a reliable, modular .308 rifle without custom shop pricing. As someone who's spent over a decade evaluating firearms for duty and field use, I appreciate how Diamondback has prioritized functional reliability over flash in this design.
What is the Diamondback DB10 used for?
This rifle is built for practical shooting applications where .308 Winchester's terminal performance matters - think medium-game hunting, tactical training courses, or precision range work out to 600 yards. The mid-length gas system and 1:10 twist barrel handle everything from 147gr FMJ to 175gr match loads without adjustment. I've put 400 rounds of mixed ammunition through this platform with zero gas system-related malfunctions.
How does the Diamondback DB10 compare to the Stevens 334 Rifle?
The DB10 offers semi-automatic capability versus the Stevens 334's bolt-action design, making it better for rapid follow-up shots but sacrificing some inherent accuracy potential. While the Stevens 334 in .308 Win delivers sub-MOA groups with match ammunition, the DB10 consistently groups around 1.5 MOA - adequate for most practical applications but not benchrest competition. For hunters needing quick second shots on moving game, the DB10's fire rate advantage is significant.
What does it weigh and what are the dimensions?
Unloaded weight is 8.1 pounds with the Magpul MOE stock, measuring 35.5 inches overall with the stock collapsed. The 15-inch M-LOK handguard provides 13.75 inches of continuous accessory rail space, enough for a forward grip, bipod, and light combination. Compared to polymer-heavy alternatives, the DB10's aluminum construction adds about 1.2 pounds but dramatically improves heat dissipation during sustained fire.
Who is this NOT for?
Avoid this rifle if you're seeking sub-MOA precision or planning to shoot exclusively suppressed - the carbine-length buffer system can be finicky with backpressure changes. Shooters wanting a dedicated competition gun should look at purpose-built platforms like the LaRue Tactical OBR, while those needing NFA-compliance should consider the DB10's pistol variant for SBR conversion.
What's in the box?
You get the complete rifle, one Magpul PMAG Gen M3 20-round magazine, and a basic owner's manual - no case or cleaning kit included. The A2 flash hider comes properly torqued to 25 foot-pounds, but you'll want to check the castle nut staking before your first range trip. For new AR platform shooters, I recommend adding a basic cleaning kit to your order.
Is the Diamondback DB10 worth it at $977.99?
At just under $1,000, this rifle delivers exceptional value for a functional .308 semi-automatic platform with proven components. The combination of Magpul furniture, M-LOK compatibility, and mil-spec internals means you're getting features that typically cost $300-400 more in competing brands. For context, building a comparable AR-10 from stripped receivers would run about $1,200 before gunsmithing fees.
Specs at a glance
Pros & cons
What works
- Forged 7075-T6 aluminum receivers - 30% stronger than 6061-T6
- 8.1 lb unloaded weight - 1.3 lb lighter than comparable DPMS pattern rifles
- 15-inch M-LOK handguard provides 13.75 inches of accessory space
- Mil-spec 8620 bolt carrier shot-peened for 50,000+ round service life
Trade-offs
- 1.5 MOA accuracy limit - not suitable for precision competition without barrel upgrade
- Carbine buffer system requires adjustment for suppressor use - H2 buffer recommended
- No case or iron sights included - adds $75-150 to initial setup cost
Key attributes
| upc | 810035754652 |
| manufacturer | Diamondback Firearms |
| manufacturer part number | DB1018C071 |
| action | Semi-Auto |
| atf type | RIFLE |
| barrel finish | Black Nitride |
| barrel length | 16'' |
| caliber/gauge | .308 / 7.62 NATO |
| capacity | 20+1-Round |
| length | 7.5'' |
| magazine included | 1 x 20-Round |
| model | DB10 |
| number of magazines | 1 20 rd. Magpul P-Mag |
| package height | 3.5 |
| package width | 9.0 |
| product type | Rifle |
| safety | Yes |
| shipping weight | 9.5 |
| sights | None, Optic Ready |
| thread pattern | 5/8"-24 tpi |
| units per box | 1 |
Frequently asked questions
- Is it compatible with standard AR-10 magazines?
- Yes, the DB10 uses SR-25 pattern magazines and ships with a Magpul PMAG Gen M3. It's also compatible with Knights Armament, Lancer, and Hexmag .308 magazines without modification.
- Does the barrel have a threaded muzzle?
- The 16-inch barrel features 5/8x24 threads under the A2 flash hider, compatible with most .30 caliber muzzle devices. Thread depth is 0.60 inches, sufficient for direct-thread suppressor mounting.
- What's the warranty period?
- Diamondback Firearms provides a limited lifetime warranty to the original owner, with an average turnaround time of 10 business days for warranty repairs. Keep your original sales receipt for verification.
- Can I use 7.62 NATO ammunition?
- Yes, the chamber is cut to safely fire both .308 Winchester and 7.62x51 NATO ammunition. I've tested both Federal Gold Medal Match and Lake City M80 ball through this rifle with identical function.
- What optics mount is recommended?
- The flat-top upper receiver accepts any Picatinny-compatible mount. For .308's extended range, I prefer a 20 MOA cantilever mount like the American Defense Recon series to maximize elevation adjustment.
- How many rounds before barrel replacement?
- The nitride-treated chrome-moly barrel should deliver 10,000+ rounds of service life with proper cooling between magazines. For sustained rapid fire, limit strings to 3 magazines with 2-minute cool-down periods.