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AR15.COM
7/25/2012 9:25:32 PM EDT
Hello,

I have an upper with a 16" DD cold hammer forged barrel that has a 0.75" FSB pinned at mid-length.  The diameter of the barrel forward of the FSB is approximately 0.74".  I would like to convert this upper to a dissipator-like barrel, with a FSB taper pinned at rifle length with a Magpul MOE rifle-length handguard.  I presume that a 0.75" FSB cannot be pinned on the barrel at rifle length because the barrel is too thin.  If that is the case, then is this what I have to have done as my only option?

1.  Contour barrel in front of FSB $65––Profile down to 0.625"?
2.  Shave existing FSB to fit under handguards $38 ––Which handguard to select to fit under?
3.  Install new FSB at rifle length $130 + Taper pins $15––Do you have new 0.625" FSB's that you stock for this purpose?
4.  Upper disassemble/reassemble $50

Are there other options that I'm not thinking of?

Thanks in advance for your help!
7/26/2012 12:18:58 AM EDT
[#1]
Sorry, didn't understand what you were looking for. You know for the price that you are spending to rework that barrel, you could get a new one for cheaper.
7/26/2012 2:43:10 AM EDT
[#2]
you have it all correct, pick TROY for the GB shave, and yes we have 0.625 FSBs. Just pick the WE provide FSB option.

Unless the barrel is 0.75 forward of the GB, i wouldnt recommend it, we can do it but........
7/26/2012 4:45:52 AM EDT
[#3]
Thanks!

One more question.  When profiling the front of the barrel, will you just turn everything down to 0.625" and mount the new FSB in that area, or will you leave a shoulder on the back side for the new rifle length FSB to be properly spaced against?  Just wondering what to expect.
7/26/2012 6:05:49 AM EDT
[#4]
We'll leave a area to seat against, as well as a small shoulder behind the threads
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