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Robert, No, that is the MVP Flex that has the .223 Wylde match chambering.

sorry it is a standard 5.56 chamber Specifications and Features: Mossberg MMR Pro 65080 AR-15 Semi Automatic Rifle Rifle Length Direct Gas Impingement 5.56 NATO accepts .223 Remington 30 Rounds 18" Free-Float Stainless Steel Barrel with a 1:8" Twist SilencerCo Suppressor Ready ASR Muzzle Brake Jerry Miculek JM Pro Adjustable Drop In Trigger Mossberg Slim Profile 15" Free-Float M-LOK Handguard Full Length Picatinny Top Rail AXTS Raptor Ambidextrous Charging Handle 6 Position Collapsible Stock with FLEX Recoil Pad Magpul MOE+ Pistol Grip and Trigger Guard Overall Length 35.75" Weight 6.75 lbs Black