Store Hours: Monday - Friday 10 - 6, Saturday 9 - 5:30 CLOSED Monday May 23rd for Victoria Day

Black Creek Labs MRX Bison 5.56 NATO 12.5" BBL

The MRX Bison is a modular chassis bolt action rifle that is compatible with lots of AR15 furniture and magazines.
3 in stock
Fast Shipping From Sudbury, Ontario
Same-Day In-Store Pickup Order by 4:00p, Mon-Sat
Delivery time: All Ammo and Firearm sales are FINAL Sale. Federal Regulations state that firearms and ammo be shipped to the address on file with the Canadian Firearms Center. No Other Shipping address can be used. Ammo and/or firearms are considered oversize/overweight

The MRX Bison is a non-restricted, modular chassis bolt action rifle that is compatible with lots of AR15 furniture and magazines.

The MRX Bison is a compact, light and rugged bolt action rifle that is chambered in 300 Blackout and is fed with AR15 magazines.  Caliber options also include 5.56N and 7.62×39.  This rifle would be comfortable in its scabbard on the side of a horse,  packed, slung or mounted onto a Utility Vehicle for ranch, range or backcountry duty.  The vertical pistol grip and adjustable stock allows for the rifle to be shot comfortably in any position and the magazine will continue to feed up to 30 rounds of 300 Blackout, 5,56 NATO or 7.62 x 39, (based on legal magazine capacity in your area).



Features and Benefits: 
  • Chassis:
    • Machined from aircraft grade aluminum. Finished with Type III hard coat anodize and Cerakote.  The chassis comes with side and under rail MLOK mounting points and an integral “one point” QD sling point on the opposite side of the bolt.
  • Action:
    • MRX Supershort with three lug bolt offering a 60 degree bolt throw.
    • Barrel:
      • 12.5 inch Match Grade Steel Barrel finished with Nitride and Cerakote
  • Trigger:
    • Triggertech Remington 700 Primary Trigger




  • Calibre: 5.56X45 NATO
  • Barrel Length: 12"
  • Action: Bolt Action
  • Hand: Right-Handed
  • Magazine: 30RND [pinned to 5) Detachable
  • SKU: BISS55612BLK
  • Iron Sights Inc: No
  • Stock: Black Synthetic / Aluminum Chassis
  • Finish: Anodized
shipping from northern ontario
shipping from northern ontario
All products ship from our warehouse in Sudbury, Ontario
Have questions? Chat with an expert now