5.56 NATO GO NO-Go Set
Headspace gauges from precision ground hardened US steel to SAAMI’s ANSI tolerances. Headspace is the distance between breech face and the base of the cartridge when the action is closed. It is best to remove the extractor, ejector, and firing pin from the bolt to achieve optimal results when checking headspace. The use of both GO and NO-GO headpsace gauges is essential for all newly reamed chambers or a newly installed barrel to a trunnion . This ensures a safe and accurate chamber that will accept SAAMI maximum ammo. Warning – Never force an action closed on any gauge.
Great quality and service from AoA. Second set of gauges purchased from AoA, so I knew where to go when I needed this caliber. Better value too compared to other competitors that sell the gauges separately.
A definite must when building your own. There are components from top of the line companies out there that are not to spec. Never had an issue until recently. Complete bcg and barrel from same reputable company and it would not close on a go gauge. Yes the bolt was disassembled then checked. Don’t know why it wasn’t checked at company. So will never build another without checking this. Highly recommend to get them, not overly expensive either. Or better yet find a buddy who has them!!!!!! But check.
High quality Reasonably priced. An essential item for anyone who dismantles, alters and reassembled . Who can take a chance on not checking headspacing?
Gauges are excellent, clearly marked and still coated in a thin film of cutting fluid. AOA service was outstanding, especially under the circumstances, order was shipped immediately. Will be back for more.
I’ve needed a set of headspace gauges for a while and these are well made.
Definitely a great investment for peace of mind. Got them fast, and determined viability of the weapon in minutes. I'm definitely going with this set in another caliber, if the need ever arises.
A must have product for anyone who is assembling their build. Peace of mind knowing your headspace is good prior to sending that first round down the barrel. Highly recommended.