My MK 12 MOD 1 Clone

Published on August 12, 2024
Duration: 38:58

This video details the process of assembling a MK 12 MOD 1 clone upper receiver. It covers the installation of a Douglas SPR barrel from Compass Lake Engineering, the Allen Engineering A5 suppressor system, and the KNS Armament RAS quad rail. The presenter emphasizes proper torque specifications for the barrel nut and alignment for the gas block and suppressor collar, offering insights into sourcing specific components for an accurate clone build.

Quick Summary

For a MK 12 MOD 1 clone build, a Douglas SPR contour barrel from Compass Lake Engineering is recommended for compatibility with the Allen Engineering A5 suppressor system. This barrel profile features a shoulder designed to seat the suppressor collar, ensuring proper alignment and function for an authentic SPR configuration.

Chapters

  1. 01:00Introduction to MK 12 MOD 1 Clone Build
  2. 01:34Suppressor Overview: Allen Engineering A5
  3. 03:06Barrel Specs: Douglas SPR Contour
  4. 04:38Rail System: KNS Armament RAS
  5. 05:40Upper and Lower Receivers: N<bos>ESKI N4
  6. 06:34Optic Selection: Leupold Mark 5 HD
  7. 07:30Trigger and Furniture
  8. 09:49Replacing the Barrel
  9. 10:44Removing Old Barrel Components
  10. 12:51Installing New Douglas Barrel
  11. 13:45Matched Bolt Installation
  12. 15:39Torquing the Barrel Nut
  13. 16:32Gas Block and Collar Installation
  14. 18:00Muzzle Brake Timing
  15. 19:06Installing the KNS RAS Quad Rail
  16. 21:25Suppressor Mounting
  17. 22:01Lower Receiver Assembly
  18. 22:32Bolt Swap and Charging Handle
  19. 23:42Scope Mounting and Zeroing
  20. 24:29Trigger Installation: TriggerTech Duty
  21. 25:45Safety Selector Installation
  22. 27:06Badger Ordnance Condition One Mount
  23. 33:29Zeroing and First Shots
  24. 34:04Accuracy Testing: 55gr FMJ
  25. 34:20Accuracy Testing: 69gr Match Kings
  26. 35:50Long Range Shooting: 600 Yards
  27. 37:43Chronograph Data Analysis

Frequently Asked Questions

What barrel is recommended for a MK 12 MOD 1 clone build to accommodate specific suppressors?

For a MK 12 MOD 1 clone, a Douglas SPR contour barrel from Compass Lake Engineering is recommended. This specific profile is designed to work with the Allen Engineering A5 suppressor collar and muzzle brake, ensuring proper fit and function.

How is the KNS Armament RAS quad rail secured to the barrel nut on an AR-15 build?

The KNS Armament RAS quad rail is secured using two specialized pins that insert into the barrel nut at the 3:00 and 9:00 positions. These pins prevent the rail from rotating, ensuring a stable platform.

What is the purpose of a headspaced bolt in a rifle build?

A headspaced bolt ensures precise alignment between the bolt face and the chamber's datum line. This critical fit improves overall reliability and accuracy by guaranteeing proper cartridge seating and extraction, similar to custom bolt-action rifles.

How does the Allen Engineering A5 suppressor system attach to the barrel?

The Allen Engineering A5 suppressor threads onto a specific muzzle brake. Its rear design then seats onto a specially machined collar on the barrel, creating a secure and integrated fit characteristic of SPR builds.

What are the benefits of a rifle-length gas system on an AR-15 platform?

A rifle-length gas system provides a longer dwell time compared to carbine or mid-length systems. This extended dwell time allows for slower and smoother cycling of the firearm's action, contributing to a more comfortable shooting experience.

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