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Is this the tube I would need for a faxing adjustable gas block on a proof 18” barrel? — 1 Answer

by Scottish Tyrant, from CO, United States Asked on March 1, 2026

Name Faxon Firearms Gas Block (5)
As Low As $16.99 Save Up to 35%
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Answered by Faxon Firearms, Manufacturer from OH, United States, on March 04, 2026

The Faxon Firearms patented adjustable gas block uses a standard gas tube like this one. As far as the Proof Research barrel, it's hard to say what gas tube you will need without additional information on the barrel.

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