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Diamondback
Overview
The Diamondback DB15 Carbon Series features a 16-inch barrel specifically designed for the 300 Blackout caliber, which is ideal for both subsonic and supersonic ammunition. This barrel length strikes a balance between maneuverability and ballistic performance, making it suitable for a range of shooting applications. Commonly, this setup is found in builds aimed at versatility and compactness, particularly for tactical or home defense scenarios.
Diamondback DB15 Carbon Series DB1780B281 Rifle 300 Blackout 16\" Barrel 30+1 Semi-Auto B5 Multicam Furniture
Prices checked
The Diamondback DB15 Carbon Series DB1780B281 Rifle 300 Blackout 16\" Barrel 30+1 Semi-Auto B5 Multicam Furniture was hard to find in September 2026, in stock on only 5 of the 15 days we checked, and today 4 of the 5 retailers we track have it in stock. The best price drifted down from $710 to $627.78 over September 2026 without a real sale. Buying today, the lowest price is $583.36 at BattleHawk Armory, which matches the best price we saw in September.
Prices checked · refreshed daily across 37 retailers
We ranked every barrel by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Barrel Length & Brand Report →Check it against the live catalog:
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