Matrix Pro Rimfire Rifle


Masterpiece Arms builds World Class Rifles. We start with our industry leading Chassis System, utilize the Best Actions and Triggers produced, and our MPA/Spencer 416R Handlapped Barrels provide some the best shooting, most accurate rifles in existence. Designed, Built and Enhanced by Long Range Shooters and Hunters, our Rifles fulfill the needs of the most discerning shooters.


Please allow 10-14 weeks to build this rifle

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The Matrix Pro Rimfire Rifle is a combination of our Matrix Pro II Competition Chassis along with an MPA Rimfire Elite Action (Vudoo 360 3 Lug) chambered for rimfire applications.

Available in a multitude of barrel profiles and muzzle threads, the rifle is setup specifically for PRS/NRL rimfire competitions.

The rifle will come standard with an ATS Barrel Tuner.

The chamber in this rifle is setup to run both Lapua/SK ammo and  Eley ammo (different rim thicknesses) with similar bullet profiles. We also have the ability to chamber the rifle in other configurations based on the ammo you prefer to run. Please reach out with any questions.

We will also offer this rifle in either 1:12 or 1:16 twist rate. Lets us know if you need help in determining the correct twist rate for your application.


  • MPA Elite Rimfire (Vudoo 3 lug) Action
  • 3 Lug Head
  • 60 Degree Bolt Throw
  • 40 MOA Scope Rail
  • Spiral Fluting
  • Black Nitride Coated Bolt
  • Polished Stainless Action Body
  • Dual Claw Extractors


  • 416RQ Stainless Steel
  • Precision Gun Drilled, Reamed and Honed
  • Pull Button Rifled
  • Stress Relieved
  • Polished
  • Hand Lapped
  • Bore and Land Inspected on Video Borescope
  • Sheffield Air Gage Inspection to .0001″ on Bore and Rifle Land Variation
  • Chamber is indicated within .0001″ or less – to the bore of the rifle
  • 1:12 or 1:16 Twist Rate
  • Variety of Chamber specs available
  • Barrel is Crowned and Not threaded. ATS Tuner is Clamp on Style.
  • If you want a threaded barrel, please let us know in the Comments section at checkout
  • MPA Custom Heavy Barrel Profile

Chassis System:

  • Masterpiece Arms Matrix Pro II with Drop Down Bag Rider
  • Lightweight Competition Buttstock Design
  • (2) Nesting Bridges
  • Magwell Plate System Ready
  • Produced from 6061 Aluminum
  • V-Bedding System with Additional clearance for Glass Bedding Action and Straight Section of Barrel
  • MPA Matrix with Adjustable Cheek Riser, Length of Pull
  • Built In Bag Rider with Butthook
  • V4 Spigot Mount (Pic Rail and Arca Swiss Rail)
  • Cerakote Finish – Multiple Colors Available
  • Built In Inclinometer leveling system
  • (2) Grips (Select at Checkout)
  • All Trigger Finger Supports
  • All Thumb Shelfs
  • R.A.T. System Compatible

Barrel Tuner:

  • ATS Barrel Tuner – Clamp On Style


  • MPA Elite Trigger (Bix n Andy TacSport Pro Custom)
  • Pull Weight: 4 oz-2 lbs

Rifle Case:

  • Plano Basic Rifle Case


  • Vudoo Rimfire Polymer 10 Round


  • Total Rifle Weight (13.5 lbs with 23″ Custom Heavy Barrel Profile – Does Not Include Ammo, Bipod, Magazine or Optic)
  • Barrel: 416R Stainless Steel, Handlapped
  • Action: MPA Elite Rimfire (Vudoo 3 Lug)
  • Chamber: Zero Runout Chambering Method
  • Brake: Not Included
  • Chassis Type: Matrix Pro II
  • Chassis Colors: Multiple
  • Chassis Material: 6061 Aluminum Billet
  • Chassis Coating: H Series Cerakote (Polished Anodizing Available)
  • Magazine: Vudoo 10 Round Polymer Rimfire Magazine
  • Chassis Weight: 6.2 lbs
  • Barrel Profile: Custom Heavy
  • Barrel Length: Varies
  • Barrel End – Crowned – Not threaded with ATS Clamp On Tuner
  • Trigger Type: MPA Elite (Bix N Andy Tac Sport Pro Custom) (4 oz – 2 lbs)
  • Adjustable Length of Pull: 13.5-14.5″
  • Cheek Riser: Adjustable
  • Recoil Plate: Adjustable for Height and Cant
  • ATS Barrel Tuner