PRIMO Gas Block .625" 416R crucible alloy

Now: $54.95
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(2 reviews) Write a Review

The PRIMO Gas Block™ is a low profile billet machined, .625” 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.

Not compatible with Griffin's HEDP barrels. Compatible gas block can be found here.

  • 416R Crucible Alloy Steel
  • QPQ Nitride finish
  • .625" 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

2 Reviews

  • 5

    Published by KING on 9th Sep 2022

    Quality gas block at a great price. I've bought two and they run flawlessly. I especially like that they include a pilot hole and pin.

  • 5

    Published by Rupert Pupkin on 30th Jul 2019

    Perfect fit, finish, everything well machined. Everything in photo was included in very nice packaging. Installed on a Faxon gunner, aligned set screws, then drilled for pin with 1/8 carbide bit. Very happy with purchase. Material and finish are identical to the Faxon barrel which was a plus, pin hole is pre drilled. very pleased.