12-29-2017, 04:30 PM
Cam Pin, Firing pin retainer, gas rings, ejector, ejector spring, extractor pin, and any o-ring/extractor spring rubber insert (Think BCM's extractor improvement kit or the like) are all interchangeable with the 5.56 AR bolt. The firing pin has a potential to be slightly different in length, so measure your standard AR extras and compare to the firing pin included with your Grendel bolt for posterity. If your Grendel pin is the same length, your golden. If it's different in length over the standard length pin in your 5.56 rifles, then you'd be well advised to go find another for your Grendel for insurance. If you are of the mind that one is none... Same for the Grendel extractor. Also, measure your bolts and record the OAL of your Grendel set up for your records.
So: The Grendel specific pieces of your bolt are
1) Bolt - duh
2) Extractor
3*) Firing pin - maybe. Measure and compare to your other pins.
Someone with more knowledge and a better memory might even post with the exact dimensions of the different firing pin lengths, if you find yourself sans-alternate chambering. Or, a search would bring this up. I know the Cabelas bolt carrier thread from a few weeks ago has this information.
Hope this helps.
So: The Grendel specific pieces of your bolt are
1) Bolt - duh
2) Extractor
3*) Firing pin - maybe. Measure and compare to your other pins.
Someone with more knowledge and a better memory might even post with the exact dimensions of the different firing pin lengths, if you find yourself sans-alternate chambering. Or, a search would bring this up. I know the Cabelas bolt carrier thread from a few weeks ago has this information.
Hope this helps.