# Diamondback Firearms 5 56 NATO Firearms - Guns For Sale

Shop Diamondback Firearms 5.56 NATO firearms built around the DB15 platform, including Gen 1 and Gen II semi-auto AR-15 style rifles. These catalog listings focus on 16-inch 5.56 NATO models with black finishes, lightweight builds, tactical sport configurations, and USA-made construction.

This tag includes Diamondback DB15 rifles with optic-ready setups, Magpul sight options, Multi-Cam finishes, and OD Green/FDE variants. Browse 5.56 NATO DB15 options designed for range use, sport shooting, and AR-platform buyers looking for familiar controls and modern rifle features.

## Featured Firearms (66 total)

| Product | Caliber | Price |
|---------|---------|-------|
| [Diamondback DB15 Carbine - 5.56mm, 16" Barrel, 30-Round Semi-Auto](https://gunsnation.com/p/diamondback-db15-carbine-5-56mm-16-barrel-30-round-semi-auto/UCEMYyPjf) | 5.56 NATO | - |
| [Diamondback DB15 5.56 NATO 10in Black](https://gunsnation.com/p/diamondback-db15-5-56-nato-10in-black/UCEGBnTO5) | 5.56 NATO | - |
| [Diamondback DB15 FDE 5.56 NATO, 16" Barrel Semi-Auto Rifle](https://gunsnation.com/p/diamondback-db15-fde-5-56-nato-16-barrel-semi-auto-rifle/UCEGBnSZh) | 5.56 NATO | - |
| [Diamondback DB15 5.56 NATO 16" M-LOK Lightweight AR Rifle](https://gunsnation.com/p/diamondback-db15-5-56-nato-16-m-lok-lightweight-ar-rifle/UCEMYyQ7W) | 5.56 NATO | - |
| [Diamondback DB15 Multi-Cam 5.56 NATO Semi-Auto Rifle, Optic Ready](https://gunsnation.com/p/diamondback-db15-multi-cam-5-56-nato-semi-auto-rifle-optic-ready/UCEGBnTsX) | 5.56 NATO | - |
| [Diamondback DB15 CA AR-15, 5.56 NATO, 16" Barrel, Adjustable Stock](https://gunsnation.com/p/diamondback-db15-ca-ar-15-5-56-nato-16-barrel-adjustable-stock/UCEGBnTWS) | 5.56 NATO | - |
| [Diamondback DB15 Tactical .300 Blackout Rifle, 16" Barrel, 30-Rd](https://gunsnation.com/p/diamondback-db15-tactical-300-blackout-rifle-16-barrel-30-rd/UCEGBnT36) | .300 AAC Blackout | - |
| [Diamondback DB15: USA-Made Semi-Auto 5.56 NATO Rifle, 16" Barrel](https://gunsnation.com/p/diamondback-db15-usa-made-semi-auto-5-56-nato-rifle-16-barrel/UCEMYyOzy) | 5.56 NATO | - |
| [Diamondback DB15 5.56 NATO Semi-Auto Rifle, 16" Black, 30-Rd](https://gunsnation.com/p/diamondback-db15-5-56-nato-semi-auto-rifle-16-black-30-rd/UCEGBnSvL) | 5.56 NATO | - |
| [Diamondback DB15 Gen 2 Tactical 5.56 NATO Rifle - 30 Round Capacity](https://gunsnation.com/p/diamondback-db15-gen-2-tactical-5-56-nato-rifle-30-round-capacity/UCEGBnSa5) | 5.56 NATO | - |
| [Diamondback DB15 5.56 NATO 7in](https://gunsnation.com/p/diamondback-db15-5-56-nato-7in/UCEGBnT80) | 5.56 NATO | - |
| [Diamondback DB15 Midnight Bronze 5.56 NATO 10" M-LOK Pistol](https://gunsnation.com/p/diamondback-db15-midnight-bronze-5-56-nato-10-m-lok-pistol/UCEGBnTVx) | 5.56 NATO | - |
| [Diamondback DB15 Tactical Rifle 5.56 NATO Semi-Auto - Black](https://gunsnation.com/p/diamondback-db15-tactical-rifle-5-56-nato-semi-auto-black/UCEGBnSYN) | 5.56 NATO | - |
| [Diamondback DB15 5.56 NATO 16in Black Nitride](https://gunsnation.com/p/diamondback-db15-5-56-nato-16in-black-nitride/UCEGBnTSH) | 5.56 NATO | - |
| [Diamondback DB15 5.56 NATO 16in Jesse James Blue](https://gunsnation.com/p/diamondback-db15-5-56-nato-16in-jesse-james-blue/UCEGBnTBC) | 5.56 NATO | - |
| [Diamondback DB15: 5.56mm Semi-Auto Tactical Rifle - USA Made](https://gunsnation.com/p/diamondback-db15-5-56mm-semi-auto-tactical-rifle-usa-made/UCEMYyQ2p) | 5.56 NATO | - |
| [Diamondback Carbon DB15 Gen 2 White Cerakote 5.56 NATO Sport Rifle](https://gunsnation.com/p/diamondback-carbon-db15-gen-2-white-cerakote-5-56-nato-sport-rifle/UCEGBnTjS) | 5.56 NATO | - |
| [Diamondback DB15 Tactical Rifle, 5.56 NATO, 16" Barrel, Magpul CTR](https://gunsnation.com/p/diamondback-db15-tactical-rifle-5-56-nato-16-barrel-magpul-ctr/UCEGBnTLV) | 5.56 NATO | - |
| [Diamondback DB-15 5.56 NATO 7in Camo](https://gunsnation.com/p/diamondback-db-15-5-56-nato-7in-camo/UCEGBnTSO) | 5.56 NATO | - |
| [Diamondback DB15 5.56 NATO 16in Chocolate Chip Camo](https://gunsnation.com/p/diamondback-db15-5-56-nato-16in-chocolate-chip-camo/UCEGBnTOo) | 5.56 NATO | - |

*Showing 20 of 66 products*

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*Data from [GunsNation](https://gunsnation.com)*