Griffin Armament Mk2 x Geissele Mk8 (Unboxing)

Published on May 9, 2025
Duration: 2:01

This video details the unboxing and assembly of a custom AR-15 build, combining a Griffin Armament Mk2 upper receiver with a Geissele Mk8 13.5-inch M-LOK handguard. The process includes disassembly of the original components, installation of the Geissele handguard, and a pin-and-weld procedure for the muzzle device to achieve legal barrel length. The completed rifle, featuring an Aimpoint T2 optic and Surefire light, is then tested at an indoor range.

Quick Summary

This AR-15 build combines a Griffin Armament Mk2 upper with a Geissele Mk8 13.5-inch M-LOK handguard. The video demonstrates the assembly process, including a pin-and-weld procedure to legally extend a 14.5-inch barrel to 16 inches.

Chapters

  1. 00:00Unboxing Griffin Armament Mk2 Upper
  2. 00:09Unboxing Geissele Mk8 Handguard
  3. 00:15Disassembly and Preparation
  4. 00:47Geissele Mk8 Installation
  5. 01:19BCG and Final Assembly
  6. 01:26Pin and Weld Process
  7. 01:35Range Testing the Build

Frequently Asked Questions

What components are used in this custom AR-15 build?

The build features a Griffin Armament Mk2 upper receiver and a Geissele Automatics Mk8 13.5-inch M-LOK handguard. It also includes an Aimpoint T2 optic, Unity FAST mount, and a Surefire Scout light.

What is the purpose of the pin and weld process shown in the video?

The pin and weld process is used to permanently attach the muzzle device to the barrel. This is typically done to extend a 14.5-inch barrel to the legal minimum length of 16 inches, complying with federal regulations.

What are the key specifications of the Geissele Mk8 handguard used?

The Geissele Mk8 handguard featured is 13.5 inches long and utilizes the M-LOK mounting system. Its part number is 05-285, and it's designed for AR-15 platforms.

What caliber is the custom AR-15 build chambered in?

The build is chambered in 5.56 NATO, which is also commonly referred to as .223 Remington. The muzzle device is threaded with 1/2x28 pitch, standard for this caliber.

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