Diamondback DB15 | AR Pistol Combo | 5.56 7″ & .300 BLK 10″

The Diamondback DB15 Pistol Combo ships with two complete upper receiver groups: a 7-inch barrel chambered in 5.56 NATO and a 10-inch barrel chambered in .300 AAC Blackout. Both uppers use pistol-length gas systems and forged 7075-T6 aluminum A3 flattop uppers, paired to a standard Diamondback forged lower. This configuration is built for compact, short-barrel utility where quick handling and modularity matter.

A compact red-dot optic such as the Holosun HS503CU pairs well with this platform and stays well under a $1,000 budget while providing a durable, fast-acquisition sight picture suitable for both barrels.

Product Specifications

• The manufacturer is Diamondback Firearms.
• The model is listed as the DB15.
• The UPC for this item is 810035755062.
• This item is a pistol configured in an AR-style platform.
• The package includes two calibers: 5.56 NATO and .300 AAC Blackout.
• Includes two complete uppers with barrels: a 7-inch 4150 Chrome MolyV, pistol-length, black nitride barrel and a 10-inch 4140 Chrome-Moly free-float, black nitride barrel.
• Both uppers operate on a pistol-length gas system.
• The bolt carrier group is a shot-peened, magnetic particle inspected Mil-Spec 8620 carrier.
• The receivers are forged 7075-T6 aluminum on both upper and lower.
• Handguard configuration: a 6-inch M-LOK handguard on one upper and a 9-inch M-LOK handguard on the other.
• Ships with two 30-round PMAGs (capacity listed as 30 + 1).
• The muzzle device is an A2 flash hider with a 1/2-28 tpi thread pattern.
• Includes a Magpul MOE (black) grip and a buffer-tube style stock pad.
• The trigger is a standard / Mil-Spec style trigger.
• The exterior finishes include black nitride barrels and matte black hard coat anodized receiver surfaces.

This DB15 pistol combo provides two ready-to-use uppers that let you tailor the platform to short-range training, practical shooting drills, or roles where a compact AR configuration is preferred. The forged receivers, mil-spec BCG, and included PMAGs make it a straightforward, user-serviceable AR pistol package for shooters who value modularity and quick-change capability.

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