Diamondback Firearms DB15 6.5 Gren Semi-Auto Rifle, 18″ Barrel

Product Description

The Diamondback Firearms DB15 6.5 Gren is a semi-auto AR-style rifle with an 18″ barrel. The barrel is 4150 chrome moly with a 1:8″ twist. It runs on a direct impingement system with a mid-length gas system, and the overall length is 38″.

This rifle has no sights, so you will need to add your own. The A3 flattop upper gives you a place to mount an optic. The 15 inch MLOK rail lets you add a sling mount, light, or other accessories. A Mil-Spec trigger and a manual safety handle the controls.

Stock, finish, and muzzle

The stock is a Magpul CTR with MOE K2 grip, and anti-slip texture pads help you keep hold of the rifle. The finish is black anodized hard coat. The barrel is threaded 5/8×24 and wears a DB CNC flash hider, so you can swap in another muzzle device if you want one. Capacity is 5+1 rounds, and the rifle uses metal AR-style magazines.

The DB15 in 6.5 Gren fits shooters who want an AR-platform rifle in a different caliber from the usual choices. It works for range sessions and for hunting-style setups once you add glass. Good pairings include a rifle optic and mount, a sling, extra magazines, 6.5 Gren ammunition, a cleaning kit, and a hard case for transport.

Diamondback Firearms DB15 6.5 Gren Semi-Auto Rifle, 18" Barrel Specifications

What’s in the Box

2 Magazines (per the manufacturer’s listing).

Fits and Pairs With

• Remington Berger OTM, 6.5 Grendel, 130 Grain, 20 Round Box
• Prvi Partizan Standard Rifle, 6.5 Grendel, 120 Grain, Boat Tail Hollow Point, 20 Round Box
• Nosler Varmageddon, 6.5 Grendel, 90 Grain, 20 Round Box
• Prvi Partizan Standard Rifle, 6.5 Grendel, 110 Grain, 20 Round Box

Ordering from Western Sport

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: Does the Diamondback DB15 6.5 Gren come with sights?

A: No. The rifle has no sights. It has an A3 flattop, so you can mount an optic of your choice.

Q: Is the DB15 6.5 Gren direct impingement?

A: Yes. It uses a direct impingement operating system with a mid-length gas system.

Q: What is the twist rate on this DB15?

A: 1:8". The 18" barrel is made of 4150 chrome moly.

Q: Is the barrel threaded?

A: Yes. The barrel is threaded 5/8×24 and comes with a DB CNC flash hider.

Q: What is the magazine capacity of the DB15 6.5 Gren?

A: 5+1 rounds. It uses metal AR-style magazines.

Warranty and Manufacturer

Covered by the Diamondback Firearms factory warranty; warranty terms come from Diamondback Firearms.

Additional information