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Hi Jared, The Diamondback AR15 style semi automatic pistol chambered in 5.56 NATO is an excellent choice for defense and recreational shooting applications. 5.56 NATO accepts .223 Remington

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It has the ability to use both .223 and 5.56 NATO see ****** specs UPC: 815875014089 Description: DBF DB15PC 223 PST 7.5 30RD B Brand: Diamondback Firearms Model: DB15PC Type: Pistol: Semi-Auto *********Caliber: 5.56 NATO|223 Finish: Black Anodized Action: Semi-Automatic Sight: No Sights Barrel Length: 7.5 Chrome-Moly Overall Length: 26 Capacity: 30+1 # of Mags: 1 Safety: Manual Safety Receiver: A3 Flat Top Upper Receiver, 7075 T6 Aluminum Muzzle: A2 Style Flash Hider Features: Rifling 1-8 RH, A2 Style Pistol Grip; 6 Aluminum Keymod Rail

Jared, the barrel is actually "Stamped" 5.56NATO so it will shoot both 5.56 and 223 without issue Sir.

Hi Jared, The Diamondback AR15 style semi automatic pistol chambered in 5.56 NATO is an excellent choice for defense and recreational shooting applications. 5.56 NATO accepts .223 Remington. FULL Specifications and Features: Diamondback DB15PCB7 --- AR-15 Style Semi Automatic Pistol --- >>>>>>>>> 5.56 NATO accepts .223 Remington --- 30 Rounds --- 7" 4140 Chrome-Moly Barrel --- 1:8 Twist --- Forged 7075 T6 Aluminum Lower --- A3 Flattop Forged 7075 T6 Aluminum --- U.S. Military proven gas-impingement system --- Shot-Peened, Magnetic Particle Inspected Mil-Spec 8620 Bolt Carrier --- 6" Diamondback Keymod Handguard --- Polymer A2 Pistol Grip --- No Sights --- Black Finish --- Overall Length 26" --- Weight 4 lbs 6.6 oz --- MADE IN THE USA!

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