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Questions & Answers
Is this a go/no go set of two? Expert Answer

This is not a set, it is a single field gauge.

by Nick B., Gear Expert, August 26, 2021
Can I use this gauge on a 6:5 creedmore barrel Assembly on a rpms 308 lower ? Expert Answer

A 7.62x51 Min/Max gauge should not be used for 6.5 Creedmoor. Here's the proper gauges.

https://www.opticsplanet.com/forster-rimless-headspace-gage.html?_iv_caliber-193146313=6-dot-5mm-creedmoor

by Kurt Colbourne, Gear Expert, March 31, 2021
Customer Reviews
Most Recent Reviews Bolt carrier checking using Forster gages by Armed, Verified Owner, October 25, 2024
Saw an article that stated not all bolt carrier groups will work in your particular rifle and I had a spare one plus I wanted to check for overall wear on original carrier so I ordered Forster 223 go / no go gages from Optics Planet and both carriers...
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Product Info for Forster Headspace Gage

Every gunsmith knows that proper use of a Gunsmithing Tools is the most reliable way to test the length of a rifle chamber. "Headspace" is the distance between the face of the breech and the base of the cartridge when the action is closed and excessive headspace can be dangerous and impair accuracy. For instance, unsupported brass fired in a rifle action with excessive headspace can rupture allowing gas to blow rearward like a rocket exhaust. Because your safety is on the line Forster Headspace Gage are made with meticulous care and exacting manufacturing standards to ensure accurate testing of your rifle's chamber. If a rifle closes on a GO gage the rifle chamber will accept any ammunition that is made within S.A.A.M.I. (industry standard) specifications. If a rifle closes on a NO GO gage, the chamber might have excessive headspace. Most gunsmiths chamber a rifle's headspace between the GO and NO GO dimensions. If a rifle closes on a FIELD gage the rifle chamber is dangerously close to or already over the S.A.A.M.I. specified maximum chamber size.image

Package Contents:

  • Forster Headspace Gage

Forster Headspace Gage Orderable Models

List of Orderable Models

Forster Headspace Gage, for 5.56 NATO--length is 1.4736 plus zero minus .0003 maximum chamber, HG556NATOMax , MPN: HG556NATOMax , UPC: 757253997815 , Code: 2RJ-HSG-FRHSGE-HG556NATOMAX
Forster Headspace Gage, for 7.62 NATO--length is 1.6455 plus zero minus .0003 maximum chamber, HG762NATOMax , MPN: HG762NATOMax , UPC: 757253997792 , Code: 2RJ-HSG-FRHSGE-HG762NATOMAX
Forster Headspace Gage, for 7.62 NATO--length is 1.6355 plus .0003 minus zero minimum chamber, HG762NATOMin , MPN: HG762NATOMin , UPC: 757253997808 , Code: 2RJ-HSG-FRHSGE-HG762NATOMIN

Forster Headspace Gage Unavailable & Discontinued Models

List of Unorderable Models

Forster Headspace Gage, for 5.56 NATO--length is 1.4636 plus .0003 minus zero minimum chamber, HG556NATOMin , MPN: HG556NATOMin , UPC: 757253997822 , Code: 2RJ-HSG-FRHSGE-HG556NATOMIN
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