Firing pin

[jmatt511]

Does the .308 use a proprietary firing pin or is the standard AR-15 firing pin compatable?

[imschur]

They are different

[98Z5V]

Waaaaay different.  Design-wise, similar, but that's about it.  Size makes a difference...  <lmao>

[jmatt511]

Waaaaay different.  Design-wise, similar, but that's about it.  Size makes a difference...  <lmao>

Funny, all the girls at the dance said it wasn't so. 

Thanks for the help guys. 

[98Z5V]

Longer, wider, with an extra "bump" in it...  All the stuff you never like to hear, really.  <dontknow>  <lmao>

Here's a small pic of the .308 FP, in the BCG breakdown:

If I get the time tomorrow, I'll do a side-by-side pic of the 5.56 and the .308 firing pins.  <thumbsup>

[johncheek]

How far should the firing pin protrude out of the bolt face when fired? Specific dimensions, PLEASE!

 

[98Z5V]

9-year Necro on this one.  I'll go measure this now...  

Edit -bolt face depth from the front of the lugs is 0.130" on an Aero/ToolCraft BCG. Firing pin protrusion from the front of the lugs is 0.090".  Firing pin protrusion on this BCG would be 0.040". Measure multiple times, around the bolt face lugs - so at multiple lugs, both to the bolt face and to the firing pin protrusion.

I'll measure an Armalite AR-10 BCG and a DWilson BCG later, and report back.  Won't be tonight, though.

Edited April 9, 2019 by 98Z5V