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in most cases and scenarios a .308 round and 7.62 round are interchangeable payloads for the same rifle. 5.56 and 2.23 rifles are also like this. the rifle if chambered in one can do the other because its the same cartridge with more grain.

Sergiy, this rifle's barrel is stamped .308 and accepts 7.62x51mm NATO. (((Complete Specifications))): - Adams Arms P2 Small Frame FGAA-00246 - AR308 Semi-Automatic Rifle - Mid-Length Short Stroke Piston Operated System - .308 Winchester accepts 7.62x51mm NATO - 30 Rounds - 16" 4150 CMV Barrel with a 1:10 Twist - Threaded 5/8x24 with an A2 Flash Hider - QPQ Melonite and Black Nitride Barrel Finish - 7075 T6 Aluminum Alloy Receivers - A4 Flat-top Forged Upper Receiver Defiance Flip-Up Sights - Free Float Adams Arms M-LOK Rail System - One Piece Bolt Carrier with Integral Strike Face - 6-Position Collapsible Buttstock - Standard Trigger - Black Hard Coat Anodized - Overall Length 34" Collapsed - Weight 8.14 lbs.

308 caliber guns can fire 7.62 ammo with no issues It is most likely a discontinued model specs are Adams Arms P2 Small Frame FGAA-00246 - AR308 Semi-Automatic Rifle - Mid-Length Short Stroke Piston Operated System - .308 Winchester accepts 7.62x51mm NATO - 30 Rounds - 16" 4150 CMV Barrel with a 1:10 Twist - Threaded 5/8x24 with an A2 Flash Hider - QPQ Melonite and Black Nitride Barrel Finish - 7075 T6 Aluminum Alloy Receivers - A4 Flat-top Forged Upper Receiver Defiance Flip-Up Sights - Free Float Adams Arms M-LOK Rail System - One Piece Bolt Carrier with Integral Strike Face - 6-Position Collapsible Buttstock - Standard Trigger - Black Hard Coat Anodized - Overall Length 34" Collapsed - Weight 8.14 lbs