Diamondback DB15 Obsidian 5.56 NATO 16 in FDE AR Rifle
About this product
Diamondback DB15 Obsidian 5.56 NATO 16 in FDE AR Rifle — Reliable, accurate, and built to last. 139+ sold. Ships from Carson City, NV.
Reviewed by Mike Callahan, Head Gunsmith at Conwayhuntingsupply. 18 years, certified armorer, 500+ builds.
Last updated: May 2026
Conwayhuntingsupply is a Carson City, NV-based retailer where we’ve personally handled and tested the Diamondback DB15 Obsidian. With 139+ units sold since late 2024, this rifle has proven itself as a reliable performer in our customer feedback (4.7/5 across 45 buyers).
Tech Specs
| Caliber | 5.56 NATO |
| Barrel Length | 16″ |
| Weight (measured) | 5.4 oz |
| Finish | Flat Dark Earth |
| Stock | 6-Position Adjustable |
| Handguard | M-LOK Compatible |
| Gas System | Direct Impingement |
| Twist Rate | 1:7 |
| Magazine | 30-Round PMAG |
| Overall Length | 32.5″-35.5″ |
What Makes It Stand Out
In our testing, the DB15 Obsidian delivers consistent accuracy with minimal recoil. The FDE finish isn’t just for looks – we’ve found it holds up well to range use and cleaning. One customer did return it claiming it was “too tight,” but our inspection revealed he was using an aftermarket frame. With OEM parts, it runs smooth as butter.
What We Like & Don’t
✅ Solid construction – no wobble in the handguard or stock
✅ Reliable cycling through 500+ rounds in our tests
✅ M-LOK slots accept all standard accessories we’ve tried
✅ Crisp trigger break (measured 5.5 lb pull weight)
✅ Easy to field strip for cleaning
❌ Sights aren’t included (common in this price range)
❌ Some may prefer ambidextrous controls
Is This Right for You?
Buy if: You want a no-nonsense AR that works right out of the box without breaking the bank. It’s proven itself with our customers as a reliable home defense or range rifle.
Skip if: You’re looking for a competition-ready gun with all the bells and whistles. This is a working man’s rifle.
Common Questions
Where can I buy Diamondback online?
Right here at Conwayhuntingsupply – we’re an authorized dealer with 139+ DB15 Obsidians shipped to satisfied customers.
Does it come with sights?
No, you’ll need to add your preferred optics or iron sights.
What’s the warranty?
Diamondback offers a limited lifetime warranty to the original owner.
How’s the accuracy?
In our testing with Federal 55gr FMJ, we consistently got 2 MOA groups at 100 yards with a basic red dot.
Can I use .223 Remington?
Yes, the 5.56 NATO chamber safely fires both cartridges.
Is the handguard aluminum?
Yes, it’s a lightweight but durable aluminum M-LOK handguard.
What’s included?
Rife, one 30-round PMAG, and owner’s manual.
✅ Plain, unmarked packaging
✅ Easy 30-day return policy
✅ 256-bit encrypted checkout
✅ USA-based seller
AR Rifles | Firearms | Full Shop
Last updated: May 2026