Masterpiece Arms Teases MPA 308BA AR-Style Bolt Action Rifle

Hot on the heels of their purchase of custom rifle and barrel maker Spencer Arms, Masterpiece Arms are teasing a AR-15 style precision bolt action rifle they are calling the MPA 308BA.

We don’t know much about it other than the above low resolution photo and that it uses a Remington 700-style bolt, is chambered in .308 Winchester, has a detachable magazine, a threaded Spencer Precision Barrel, a monolithic rail/handguard and uses AR-15 pistol grips and stocks. The MSRP will be $2495.99 and it will not be available until next year.

Steve Johnson

Founder and Dictator-In-Chief of TFB. A passionate gun owner, a shooting enthusiast and totally tacti-uncool. Favorite first date location: any gun range. Steve can be contacted here.


  • Lance

    Nice looks very SOCOM PSRish hope they make a .300 Win mag version.

  • SiloZen

    Teaching my good sir? 😛

    • Formynder

      Rifles that can learn–the preferred weapon for Skynet.

    • greg sanders

      patent parlance

    • Steve (TFB Editor)

      I never make mistakes so it must mean this is a sentient rifle 😉

      • SiloZen

        Haha ;P fair show.

  • Wtfgun

    Nothing lines up on this illustration. It looks mag fed, but the bolt throw isnt long enough to clear the chamber all the way to the open portion of the upper to eject?

  • drew

    how do you remove the bolt? Is there enough clearance?

    • Jeremy Star

      Looks like the upper is attached just like an AR upper, so I would imagine you simply push the take down pins out and swing the upper forward to remove the bolt.

  • SnJohnson

    The thing is, would you spend $2500 on an MPA?

    • Michael


  • -Rogue-

    To me personally, it must have compatibility with SR-25 style mags to complete the look and move from the “cool” to the “do-want” category.

    • smith934

      Mag appears to be an AI mag.

  • smith934

    I suspect what we are seeing is a variation of the tube gun concept where the 700 action is epoxied into a ‘tube’ such as here