Diamondback198468101
Diamondback DB15 Handgun .300 Blk 30rd Magazine 10.5" 5/8x24 Threaded Barrel FDE with SBA5 Brace$988.88
Availability: In Stock
The Diamondback DB15 Handgun in .300 Blackout is a compact, modern pistol-caliber AR designed for shooters who want versatility in a short-barreled platform. Built on a forged aluminum receiver set with a 10.5-inch heavy barrel and pistol-length gas system, this Diamondback rifle-caliber pistol delivers the ballistics of .300 Blackout in a maneuverable package ideal for close-quarters work, vehicle operations, or anyone looking to suppress and shoot subsonic loads. The SB Tactical SBA5 brace provides support and control without the tax-stamp burden of an NFA short-barrel rifle, while the 30-round Magpul magazine gives you real capacity for dynamic shooting scenarios.
The upper features a flat-top receiver and a 9-inch M-LOK handguard with integrated Picatinny rails and QD mounts for quick-attach accessories. A Magpul MOE K2 grip and MOE enhanced trigger guard round out ergonomics, while the Diamondback Obsidian muzzle brake (5/8x24 thread) is built for sound control and recoil management. The mil-spec trigger and shot-peened, mag-particle-inspected carrier ensure reliability, and the 4150 CrMov heavy barrel with 1:8 twist is rifled to stabilize a range of .300 Blackout ammunition weights. Finished in black anodize, the DB15 comes in at 6.25 lbs—light enough to be genuinely handy, but substantial enough to run hard.
If you're building a home-defense setup, experimenting with short-range hunting, or just want a fun, modular .300 Blackout platform without the Form 4 wait, the Diamondback DB15 pistol offers real value and Diamondback's reputation for solid, no-frills reliability. Optics and iron sights are not included, leaving the upper receiver and handguard ready for your choice of mounted glass or red dot.
| Caliber | .300 Blackout |
| Barrel Length | 10.5 inches |
| Barrel Material | 4150 CrMov, black nitride finish |
| Barrel Twist | 1:8 right-hand |
| Gas System | Pistol length |
| Upper Receiver | A3 flattop, forged 7075 T-6 aluminum |
| Lower Receiver | Forged 7075 T-6 aluminum |
| Carrier Group | Mil-spec 8620 steel, shot-peened, mag-particle-inspected |
| Handguard | 9-inch M-LOK anti-rotation V4 S-rail with full Picatinny and QD mounts |
| Grip | Magpul MOE K2 |
| Trigger Guard | Magpul MOE enhanced |
| Brace | SB Tactical SBA5 |
| Trigger | Standard mil-spec |
| Muzzle Device | Diamondback Obsidian muzzle brake, 5/8x24 thread |
| Sights | None included |
| Magazine | Magpul Gen M2 PMAG, 30-round |
| Finish | Black anodize |
| Weight | 6.25 lbs |
| Length (Collapsed) | 28.25 inches |
| Length (Extended) | Collapsed/extended lengths provided; extended length per SBA5 brace design |
| Muzzle Thread | 5/8x24 |
The short 10.5-inch barrel, pistol brace, and .300 Blackout caliber make this an excellent choice for home defense, vehicle operations, close-quarters shooting, or subsonic suppressed shooting. The platform is also popular among shooters who want to experiment with .300 Blackout ballistics without the tax-stamp cost of an NFA short-barrel rifle.
No. The upper receiver is a flat-top design with the handguard's integrated Picatinny rail, giving you a clean setup for mounting your choice of red dot, magnified optic, or iron sights. The QD mounts on the handguard simplify quick-attach accessory installation.
The DB15 ships with one 30-round Magpul Gen M2 PMAG and the SB Tactical SBA5 brace already installed. No sights or optics are included.
Yes. The 5/8x24 threaded barrel is ready for a suppressor rated for .300 Blackout. The .300 Blackout cartridge, especially subsonic loads, is widely suppressed, and the muzzle brake threads accept most aftermarket suppressors in that thread pitch. Always verify your local and federal regulations regarding NFA items.
At 6.25 lbs and collapsing to 28.25 inches, the DB15 is genuinely compact and handy. The SBA5 brace and short barrel make it suitable for tight spaces, vehicle storage, and dynamic shooting environments where a full-size rifle would be unwieldy.
SKU: 198468105 • Weight: 7.6oz
Availability: In Stock
The Diamondback DB15 Handgun in .300 Blackout is a compact, modern pistol-caliber AR designed for shooters who want versatility in a short-barreled platform. Built on a forged aluminum receiver set with a 10.5-inch heavy barrel and pistol-length gas system, this Diamondback rifle-caliber pistol delivers the ballistics of .300 Blackout in a maneuverable package ideal for close-quarters work, vehicle operations, or anyone looking to suppress and shoot subsonic loads. The SB Tactical SBA5 brace provides support and control without the tax-stamp burden of an NFA short-barrel rifle, while the 30-round Magpul magazine gives you real capacity for dynamic shooting scenarios.
The upper features a flat-top receiver and a 9-inch M-LOK handguard with integrated Picatinny rails and QD mounts for quick-attach accessories. A Magpul MOE K2 grip and MOE enhanced trigger guard round out ergonomics, while the Diamondback Obsidian muzzle brake (5/8x24 thread) is built for sound control and recoil management. The mil-spec trigger and shot-peened, mag-particle-inspected carrier ensure reliability, and the 4150 CrMov heavy barrel with 1:8 twist is rifled to stabilize a range of .300 Blackout ammunition weights. Finished in black anodize, the DB15 comes in at 6.25 lbs—light enough to be genuinely handy, but substantial enough to run hard.
If you're building a home-defense setup, experimenting with short-range hunting, or just want a fun, modular .300 Blackout platform without the Form 4 wait, the Diamondback DB15 pistol offers real value and Diamondback's reputation for solid, no-frills reliability. Optics and iron sights are not included, leaving the upper receiver and handguard ready for your choice of mounted glass or red dot.
| Caliber | .300 Blackout |
| Barrel Length | 10.5 inches |
| Barrel Material | 4150 CrMov, black nitride finish |
| Barrel Twist | 1:8 right-hand |
| Gas System | Pistol length |
| Upper Receiver | A3 flattop, forged 7075 T-6 aluminum |
| Lower Receiver | Forged 7075 T-6 aluminum |
| Carrier Group | Mil-spec 8620 steel, shot-peened, mag-particle-inspected |
| Handguard | 9-inch M-LOK anti-rotation V4 S-rail with full Picatinny and QD mounts |
| Grip | Magpul MOE K2 |
| Trigger Guard | Magpul MOE enhanced |
| Brace | SB Tactical SBA5 |
| Trigger | Standard mil-spec |
| Muzzle Device | Diamondback Obsidian muzzle brake, 5/8x24 thread |
| Sights | None included |
| Magazine | Magpul Gen M2 PMAG, 30-round |
| Finish | Black anodize |
| Weight | 6.25 lbs |
| Length (Collapsed) | 28.25 inches |
| Length (Extended) | Collapsed/extended lengths provided; extended length per SBA5 brace design |
| Muzzle Thread | 5/8x24 |
The short 10.5-inch barrel, pistol brace, and .300 Blackout caliber make this an excellent choice for home defense, vehicle operations, close-quarters shooting, or subsonic suppressed shooting. The platform is also popular among shooters who want to experiment with .300 Blackout ballistics without the tax-stamp cost of an NFA short-barrel rifle.
No. The upper receiver is a flat-top design with the handguard's integrated Picatinny rail, giving you a clean setup for mounting your choice of red dot, magnified optic, or iron sights. The QD mounts on the handguard simplify quick-attach accessory installation.
The DB15 ships with one 30-round Magpul Gen M2 PMAG and the SB Tactical SBA5 brace already installed. No sights or optics are included.
Yes. The 5/8x24 threaded barrel is ready for a suppressor rated for .300 Blackout. The .300 Blackout cartridge, especially subsonic loads, is widely suppressed, and the muzzle brake threads accept most aftermarket suppressors in that thread pitch. Always verify your local and federal regulations regarding NFA items.
At 6.25 lbs and collapsing to 28.25 inches, the DB15 is genuinely compact and handy. The SBA5 brace and short barrel make it suitable for tight spaces, vehicle storage, and dynamic shooting environments where a full-size rifle would be unwieldy.
SKU: 198468105 • Weight: 7.6oz