Diamondback Firearms DB15C 5.56 NATO Semi-Auto Rifle, 16″ Barrel, DB1790K005
Home » Shop » Diamondback Firearms DB15C 5.56 NATO Semi-Auto Rifle, 16″ Barrel, DB1790K005
Home » Shop » Diamondback Firearms DB15C 5.56 NATO Semi-Auto Rifle, 16″ Barrel, DB1790K005
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$668.00Original price was: $668.00.$594.00Current price is: $594.00.
🚚 Ships to your local FFL — order online, put your FFL dealer’s name and address in the Order notes box at checkout, and we coordinate the rest. Most firearms ship same or next business day. How buying a gun online works.
FREE SUPPRESSOR WITH THIS GUNBuy this firearm and get a free Outlier Backdraft Hunter 4″ suppressor, a $189 value. In stock now, while supplies last. How it works →
Diamondback Firearms DB15C is a semi-auto AR-15 rifle chambered in 5.56 NATO with a 16" 4150 chrome moly barrel and a 1:8" twist. It suits shooters who want a flattop, M-LOK carbine-style rifle with no sights, ready for their own optic or backup sights.
5.56 NATO semi-auto, direct impingement
16" 4150 chrome moly barrel, 1:8" twist
10+1 round capacity with polymer AR magazine
Magpul CTR MOE stock, 32.5" overall length
15 inch M-LOK rail, A3 flattop optic mount
A2 flash hider on 1/2×28 threaded muzzle
SKU: DAV-DB1790K005 · Mfr part #: DB1790K005 · UPC: 810035755925
The Diamondback Firearms DB15C is a semi-auto AR-style rifle in 5.56 NATO with a 16″ barrel. The barrel is 4150 chrome moly with a 1:8″ twist. It runs on a direct impingement system with a carbine gas system, and it has a manual safety, a forward assist and a dust cover.
The finish is black anodized hardcoat. Up front is a 15 inch M-LOK rail, so you can mount a light, a grip or other M-LOK accessories without swapping handguards. The muzzle wears an A2 flash hider on 1/2×28 threads, which means a threaded barrel for muzzle devices that use that thread.
Built to be set up your way
This rifle has no sights. The A3 flattop upper gives you a mounting surface for an optic, and you can add backup sights if you want them. The stock is a Magpul CTR and the grip is a MOE. Overall length is 32.5″. The standard trigger is a good starting point if you plan to upgrade later.
Capacity is 10+1 rounds, and the rifle uses polymer AR-style magazines. It fits shooters who live under a 10-round magazine rule or just want a handy range rifle. Good gear to pair with it includes a red dot or low-power scope, a sling, a weapon light for the M-LOK rail, extra AR magazines and a padded rifle case.
Order online and we ship it to the licensed FFL dealer you choose near you — see how buying a gun online works. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.
Frequently Asked Questions
Q: What caliber is the Diamondback DB15C?
A: 5.56 NATO. The barrel is 16" long with a 1:8" twist.
Q: Does the DB15C come with sights?
A: No. It has no sights. The A3 flattop upper is made for mounting an optic, and you can add backup sights separately.
Q: How many rounds does the DB15C hold?
A: 10+1 rounds. It uses polymer AR-style magazines.
Q: Is the DB15C barrel threaded?
A: Yes. The muzzle has an A2 flash hider on 1/2×28 threads.
Q: Is the DB15C direct impingement or piston?
A: Direct impingement. It has a carbine gas system.
Warranty and Manufacturer
Covered by the Diamondback Firearms factory warranty; warranty terms come from Diamondback Firearms.
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