MPA Custom Shop 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.



Lead Time Depends on components used. Estimate between 10-20 weeks.

SKU: MPA65BA-2 Category: Tags: , ,

MPA Custom Shop Rifle

This rifle uses our new Matrix Chassis and is available in a wide variety of calibers, actions and other customized configurations. The concept behind this rifle is giving the shooter the ability to choose the Action, Caliber, Trigger, Color, Barrel Length, Profile and other features so they get exactly what they want. Glass Bedding is also available.

We would love to discuss this build with you. Feel free to reach out to 

If you want a certain component as part of this build that you don’t see on this list, please contact us to discuss.

  • Caliber – Customers Choice (6BR, 6BRA, 6 Dasher, 6XC, 6GT, 6×47 Lapua, 6.5 Creedmoor, 6.5×47 Lapua, 6.5 PRC, 308 WIn, 300 Win Mag, 300PRC, 300 Norma, 338 Lapua). If your preferred caliber is not shown on this list, please contact MPA.
  • Magazine – AICS or AW Mag Compatible. (10 Round AICS Compatible Magazine Included)



  • Various Action options include: Curtis Valor/Vector Short or Long, Impact 737 Short or Long, Defiance Deviant, Big Horn TL3, Stiller TAC Series, Kelblys Atlas Tactical
  • If your preferred action is not on this list, please contact us


  • Spencer/MPA Rifle Barrel
  • 416RQ Stainless Steel
  • Precision Gun Drilled, Reamed and Honed
  • Pull Button Rifled
  • Stress Relieved
  • 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

Chassis – Matrix Chassis

  • Masterpiece Arms Matrix Chassis
  • Produced from 6061 Aluminum
  • V-Bedding System with Additional clearance for Glass Bedding Action and Straight Section of Barrel
  • MPA Buttstock with Adjustable Cheek Riser, Length of Pull
  • Night Vision Bridge (Enhanced bridge is available – please contact us)
  • V4 Spigot Mount
  • Matrix Fitment System (Multiple Grips, Thumb Shelves and Trigger Finger Supports) – 2 Grips are included with the purchase. Use the picture in the image options to select the grip of your choice. All Trigger Finger Supports and Thumb Shelfs are included in the purchase. 
  • Cerakote Finish – Multiple Colors Available – Custom colors, such as Gun Candy, Tiger Stripe, etc MUST BE PURCHASED SEPARATELY AS AN ADD ON ACCESSORY HERE
  • User Locate-able Barricade stop system compatible (requires purchase of rotating barricade stop)
  • Built In Inclinometer leveling system
  • Thumb Notch
  • R.A.T. System Compatible

MPA Muzzle Brake

  • MPA DN3 Premium Muzzle Brake
  • Direct Thread Attachment, User index-able (5/8-24 TPI)


  • Standard configuration: Trigger Tech Special or Timney Hit
  • Upgrade options available: Trigger Tech Diamond, Jewel HVR
  • Other trigger options – if you do not see your preferred trigger listed, please contact us

Accuracy Guarantee

  • 3/8″ MOA (3 shot group)

Rifle Case

  • Plano Basic Rifle Case


  • Chassis Weight – 6.2 lbs
  • Rifle Weight – Varies depending on barrel length and profile
  • Barrel Twist –  Varies depending on caliber and bullet weight
  • Barrel Length – Customers choice
  • Barrel Muzzle Thread – 5/8-24 TPI or 3/4-24
  • Barrel Profile – Customers choice
  • Coating – Cerakote
  • Length of Pull – 13.5-15″ (Shorter LOP can be achieved – please contact us for options)
  • Trigger Pull – 4 oz-3 lbs.
  • Magazine: AICS Type Magazine