PRIMO Gas Block .750" 416R crucible alloy

Now: $54.95
(You save )
(3 reviews) Write a Review

The PRIMO Gas Block™ is a low profile billet machined, .750” ID block, made from nitrided 416R crucible alloy steel. The block has two provisions for mounting, set screws and / or pinning. The included splined pin allows qualified gunsmiths and experienced builders the option of having a military style secured gas block. A 1/8” carbide drill bit and three ton press are recommended for pinning. Knurl grip cup pointed fasteners ensure a secure attachment to host barrel. The PRIMO's pre-drilled hole helps locate the drilling operation on pre-dimpled barrels for fixture free installation.

  • 416R Crucible Alloy Steel
  • QPQ Nitride finish
  • .750" gas block diameter compatible
  • low profile design
  • included splined pin
  • Knurl grip - cup pointed fasteners
  • inlcuded hex key
  • Included gas tube roll pin
  • Pre-drilled for ease of barrel pin installation
Type Of Part:
Gas Block

3 Reviews

  • 5
    Will buy again!

    Published by Chang on 25th Oct 2023

    Awesome gas block to have i highly recommend it, it is a tight and secure gas block with a reasonable price just dont use set screws for your barrel pin it too. I will buy again!

  • 5
    General review

    Published by Red on 24th Apr 2023

    Griffin makes great products. That was the reason behind my choice in this gas block. I’ve purchased other products made by Griffin that have held up. I will continue to be customer.

  • 5
    Fixed My Problem

    Published by Brandon on 8th May 2020

    I am what many would consider a poor, so while building my AR10 I used a PSA upper. The adjustable gas block didn't work and I had constant cycling issues. Griffin Armament being less than 30 miles away from my house had the best quality part and it fixed my problem. Very pleased to say that I no longer have issues with my rifle.