I would measure the bolt face depth and the overall length of the bolt from the tail to the face of the bolt. Measure the firing pin overall length. There is a .008 tolerance in fringing pin protrusion minimum length .028 to maximum .036.
AR-15 6.5 Grendel bolt face depth .136 AA bolt length 2.810 +or- manufacturing tolerance (usually .001-002)
Firing pin spec 3.2800 tolerance up to -.009.
A few 6.5 Grendel bolts are sold where the overall length is 2.800 and these bolts need a shorter firing pin to reduce the risk of slam fires or pierced primers. A standard 5.56 bolt face depth is .125 with an overall length bolt of 2.800 +or- manufacturing tolerance. A few 6.5 Grendel bolts have the .136 bolt face depth but use the shorter 2.800 overall length.
There have been a few instances over the years reported on this forum where the bolt and firing pin produced an out of spec firing pin protrusion.
If someone had a 6.5 Grendel barrel head spaced to use a .125 Type 1 (7.62x39) bolt but used the deeper .136 bolt face depth 6.5 Grendel bolt this could contribute to a minimum firing protrusion or excessive head space.
AR-15 6.5 Grendel bolt face depth .136 AA bolt length 2.810 +or- manufacturing tolerance (usually .001-002)
Firing pin spec 3.2800 tolerance up to -.009.
A few 6.5 Grendel bolts are sold where the overall length is 2.800 and these bolts need a shorter firing pin to reduce the risk of slam fires or pierced primers. A standard 5.56 bolt face depth is .125 with an overall length bolt of 2.800 +or- manufacturing tolerance. A few 6.5 Grendel bolts have the .136 bolt face depth but use the shorter 2.800 overall length.
There have been a few instances over the years reported on this forum where the bolt and firing pin produced an out of spec firing pin protrusion.
If someone had a 6.5 Grendel barrel head spaced to use a .125 Type 1 (7.62x39) bolt but used the deeper .136 bolt face depth 6.5 Grendel bolt this could contribute to a minimum firing protrusion or excessive head space.