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

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

Please click the green box stating it as the best answer. This will stop unwanted emails. We are rated on our answers and are just volunteers, not Buds employees. You can choose more then one Thank you!

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