Cause of slam-fire in my 6.5CM AR10?

[mel]

Get out the q-tips and clean the firing pin channel. The pin should have bounced back after the bolt closed. Something created resistance. The weight of the pin should not create the force to fire without the hammer spring power.

As a note: drop the bolt on a round. Eject that round and you notice a small dimple where the pin bounces off the primer.



Question: Are you using a heavy buffer or extra power recoil spring?

i had just installed a strike industries flat wire buffer spring in it about a week ago , and also just upgraded the bolt to a brownels nickle boron bcg , prolly 20-30rounds on each , i did notice the firing pin on this new bolt does seem to protrude more then the bolt i took out when u push it forward