Griffin Armament MK2 Upper Review

Published on April 29, 2025
Duration: 2:45

This review covers the Griffin Armament MK2 Upper, highlighting its components and performance. Key features include the Griffin Taper Mount Stealth Flash Suppressor, a 14.5-inch 416R stainless steel barrel with R5 rifling, and a 13.5-inch M-LOK rail. The non-adjustable gas system and enhanced BCG are noted for reliability and minimal gas blowback, even when suppressed. Accuracy testing yielded approximately 2 MOA with an average shooter.

Quick Summary

The Griffin Armament MK2 Upper features a 14.5-inch 416R stainless steel barrel with R5 rifling, pin-welded to achieve a 16-inch legal length. It includes a Griffin Taper Mount Stealth Flash Suppressor and a 13.5-inch M-LOK rail. Accuracy tests yielded approximately 2 MOA with average shooters, and the non-adjustable gas system performed reliably, even when suppressed, with minimal gas blowback.

Frequently Asked Questions

What is the accuracy of the Griffin Armament MK2 Upper?

During testing with average shooters and a Sig Sauer 3-18x optic, the Griffin Armament MK2 Upper achieved approximately 2 MOA (Minute of Angle) accuracy. This indicates a group size of roughly 2 inches at 100 yards.

What type of barrel does the Griffin Armament MK2 Upper use?

The Griffin Armament MK2 Upper features a 14.5-inch barrel constructed from 416R stainless steel. It is designated as an HDP (High Endurance Steel Performance) barrel, designed for high durability and precision, and is pin-welded to meet the 16-inch legal length requirement.

How does the gas system perform on the Griffin Armament MK2 Upper, especially when suppressed?

The upper is equipped with a non-adjustable gas system and a low-profile Griffin Primos gas block. It performed very well when suppressed, with minimal gas blowback into the shooter's face, contributing to a comfortable shooting experience.

What are the key features of the rail system on the Griffin Armament MK2 Upper?

The Griffin Armament MK2 Upper includes a 13.5-inch Griffin 135 Pro Low M-LOK rail. It features M-LOK slots on the sides and bottom, a Picatinny rail across the top, and internal ridges designed to reduce weight while maintaining strength and stability.

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