I seem to always mention this but Brownells is one of the few companies to have a different overall length with their 6.5 Grendel bolt. Bill Alexander used the deeper .136 bolt face compared to the 5.56/223 .125 bolt face depth. AA lengthened the 6.5 Grendel bolt .01 to a overall length of 2.810. The Brownells bolt measure 2.800 with a usual tolerance of + or - .002-.003.
I would not switch firing pins between different AR-15 bolts without first measuring the firing pins. The specification for firing pin protrusion is minimum .028 maximum .036. The maximum AR-15 firing pin length is 3.279 with a tolerance of -.009. Excessive firing pin protrusion can contribute to pierced primers or failure to fire with a short firing pin. Forum members have measured Brownells firing pins and most measure 3.269 + or - .002.
This problem became evident when Odin Works released their 6.5 Grendel and people were getting pierced primers. The problem was 2.800 length bolt with standard AR-15 length firing pins and out of spec firing pin protrusion. Toolcraft released 2.800 length bolts for a short time but switched to 2.810 bolts. Brownells list a shorter AR-15 firing pin on their web site but Ive never seen them in stock. I called Brownells technical a couple years ago and they were unaware of the issue. I have never read where Brownells has started using the longer 2.8100 bolt.
As a safety concern I try not to get my AR-15 firing pins mixed up. Excessive firing pin protrusion can contribute to a slam fire with an AR-15 when chambering a cartridge.
As long as you use the correct length firing pin the Brownells bolt/BCG in 6.5 Grendel seem fine. I just wish all the 6.5 Grendel bolts were 2.810 length so their would be less confusion. Any time you use a different caliber in the AR-15 than 5.56/223 there isnt as much standardization.
I would not switch firing pins between different AR-15 bolts without first measuring the firing pins. The specification for firing pin protrusion is minimum .028 maximum .036. The maximum AR-15 firing pin length is 3.279 with a tolerance of -.009. Excessive firing pin protrusion can contribute to pierced primers or failure to fire with a short firing pin. Forum members have measured Brownells firing pins and most measure 3.269 + or - .002.
This problem became evident when Odin Works released their 6.5 Grendel and people were getting pierced primers. The problem was 2.800 length bolt with standard AR-15 length firing pins and out of spec firing pin protrusion. Toolcraft released 2.800 length bolts for a short time but switched to 2.810 bolts. Brownells list a shorter AR-15 firing pin on their web site but Ive never seen them in stock. I called Brownells technical a couple years ago and they were unaware of the issue. I have never read where Brownells has started using the longer 2.8100 bolt.
As a safety concern I try not to get my AR-15 firing pins mixed up. Excessive firing pin protrusion can contribute to a slam fire with an AR-15 when chambering a cartridge.
As long as you use the correct length firing pin the Brownells bolt/BCG in 6.5 Grendel seem fine. I just wish all the 6.5 Grendel bolts were 2.810 length so their would be less confusion. Any time you use a different caliber in the AR-15 than 5.56/223 there isnt as much standardization.