Leave it to Griffin to bring you the best. Did they really have to make this gas block in 416R stainless steel? Not really, but they did, and they included set screws and a wrench and a gas tube roll pin for convenience. And, just in-case you want more protection, they pre-drilled the gas block for a pin, and included the pin.
The PRIMO Gas Block is a low profile billet machined 416R crucible alloy steel composition with a QPQ nitride finish in a 0.750" journal ID. 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.
