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Posted: 5/1/2011 10:08:40 PM EDT
So, whats the difference?
Link Posted: 5/1/2011 11:33:26 PM EDT
The difference is all in the throat. The spec II has a longer throat and the more shallow leade at the origination of the rifling. These 2 differences allow the use of higher performance loads in the spec II. The difference is similar to a comparison of 5.56mm & the .223 Rem.
Link Posted: 5/1/2011 11:34:54 PM EDT
You want a Spec 2 Chamber.
Link Posted: 5/1/2011 11:50:48 PM EDT
Originally Posted By mcrik:
The difference is all in the throat. The spec II has a longer throat and the more shallow leade at the origination of the rifling. These 2 differences allow the use of higher performance loads in the spec II. The difference is similar to a comparison of 5.56mm & the .223 Rem.


this plus

I wanna

Spec II Chamber 4 groove 1:11 twist  (or Noveske's version)

In order to shoot higher pressure Silver State Armory tactical loads
Link Posted: 5/2/2011 12:11:27 AM EDT
[Last Edit: 5/2/2011 12:11:27 AM EDT by Zhukov]
this is covered in detail in the ar variants forum
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