12-29-2017, 05:05 PM
GF, check your measurements. A dedicated 65G bolt, such as the ones I sell in group buys, has an overall length of 2.811". Since a 65G bolt with a boltface depth of 0.136 is 0.011 deeper than a standard 5.56 bolt with boltface depth of 0.125, we simply add that 0.011 to the tail of the bolt so that we can still use standard AR firing pins.
Somewhere on the internet is the original drawing for a mil-spec M16 bolt, and I'd have to dig it up to verify the original bolt overall length of a standard 5.56 bolt, but I'm thinking it's . . . wait for it . . . 2.800 or 2.799. Could be wrong, though.
U P D A T E : Yep, M16 bolt per my crappy copy of military drawing #8448510 specs it at 2.800.
Somewhere on the internet is the original drawing for a mil-spec M16 bolt, and I'd have to dig it up to verify the original bolt overall length of a standard 5.56 bolt, but I'm thinking it's . . . wait for it . . . 2.800 or 2.799. Could be wrong, though.
U P D A T E : Yep, M16 bolt per my crappy copy of military drawing #8448510 specs it at 2.800.
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