i believe it is about 2 inches or less. i know ed at hdps threw one on a 14.5" barrel to make it a legal 16".
more importantly do you have a olds 442.......because i am looking into getting one. i have an 84 cutlass right now and thinking of going older.
how do you like it?



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I've been around Oldsmobiles my whole life and love them.
I'll be turning down an AR barrel in length so the thread rate doesn't present a problem either. 
