New Upper Seen On Colt Advanced Piston Carbine (APC)

At the AUSA Expo a Colt Advanced Piston Carbine (APC) was on display with a new monolithic upper. Instead of the regular Colt APC quad rail, this version only has a picatinny rail along the top. It is tapped and drilled for picatinny rail sections, or other compatible accessories, on the sides and underneath. The rail extends to the end of the gas block and a rail extension can be bolted on allowing for an extra few inches of rail forward of the front sight/gas block.

Many thanks to Ten Pound Monkey for the photo.

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.


  • Patrick Karmel Shamsuddoha

    it’s good to see the old guard getting on the lighter, faster , stronger band wagon!

  • Looks good I wish they had gotten more pics of the MSBS.

    • Lance

      Who makes that????

      • Moose

        Radom of Poland, it also has a bull pup variant and both are planned US releases. There’s some pics from SHOT 2013 of this and the pup

      • Andrey Martim

        That MSBS is a beautiful rifle…

  • Anonymoose

    It kind of reminds me of those DRD Tactical takedown ARs, only monolithic instead of takedown. 😐

  • Sam Cadle (TFB)

    Good to see more piston uppers on the market. Happen to love the pistons, and will probably never go back to a DI uppers for AR15’s. Nice to see Colt coming into the future…

  • John Sjöström

    “Advanced Piston”? Why is it advance?

    • Anonymoose

      Because it’s got a monolithic quadrail/upper.

      • LCON

        Because colt is finally hoping on the band wagon and like to think its a game changer when they do.

  • mig1nc

    Needs Keymod 🙂