AR15.Com Archives
 FSB swap?
Church  [Team Member]
6/7/2011 6:07:22 PM EST
Is it possible to swap the FSB on a Polish tantal out for a Bulgarian FSB? With out turning the barrel down?
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bloodsport2885  [Team Member]
6/7/2011 9:29:20 PM EST
The barrel journal where the FSB sits are both different diameters and lengths. It would require a lathe.

The Tantal averages a diamter of .562" with a FSB length of .850"
The Bulgarian is .572x1.3"

Church  [Team Member]
6/7/2011 10:26:43 PM EST
Damn. Anyone know how much it would cost to shorten a AK barrel? Wouldn't mind mind bringing it down to 16.5" with a pinned on 4 slot FH.