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2/27/2008 4:20:14 PM EDT
I just ordered a new Bushmaster A2 16" upper Hbar with a birdcage FH

I am going to take the FH off and put on one of those nifty thread hiders. . .  I don't have the item in my hand yet, but want to order the thread protector before it even gets here. .. . . .  SO
My question is, how long are the threads, I can order these in a variety of lengths.


I am assuming they are 1/2 28TPI  am I correct in this?

I am guessing that I need to get one like 1/2 inch long. . . can someone tell me for sure?

Thanks.
2/27/2008 4:42:19 PM EDT
[#1]
0.6 is standard

ETA: Yes, they are 1/2 28.
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