User Panel
User Panel
User Panel
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Posted: 7/29/2018 6:02:39 PM EDT
[#1]
By virgin, you mean that the channels for the taper pins have not been drilled on the barrel yet, correct.
If yes, then someone like Adco should be able to handle such, and make sure you know that height FSB needs to be installed. Hence if carbine, then the FSB needs to be the taller F type. If for rifle, then standard height FSB instead. Also keep in mind that there are the Clamp type FSB's that you don't drill the barrel for taper pins isntead. 
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Posted: 7/29/2018 10:34:41 PM EDT
[#2]
Thanks...it’s a m16A1 retro...
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Posted: 7/29/2018 11:02:55 PM EDT
[#3]
Go and read in the AR retro forum. John Thomas can do it and do a great job. His email is: [email protected].
JT's current rate sheet (spring 2018) and he only charges $60 to mount a front sight. |
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Posted: 7/30/2018 6:59:17 AM EDT
[#4]
Thanks.
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Posted: 7/30/2018 3:22:39 PM EDT
[#5]
It is important to get an armorer who has the right tools and expertise. I think you found a good source.
No offense to others, who might be very well qualified, but this job is not one that I do myself. Getting a gas block drilled and pinned is easy, but lining up so that the front sight actually aims and is not canted is pretty specific work, and it does not take much to be off by an MOA or two. Think about it. An MOA is 1/60 of a degree, so 1/60 of 1/360 of the complete distance around the barrel, so 1/21,600 of the circumference, and with 3/4" diameter, C=2(Pi)r or 1.18", 1 minute of angle is 0.00005 inches. I cannot measure that, let alone get it correct drilling two holes. 
That is why we send this shit out to someone with brain surgeon hands and eyes. |
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Posted: 7/30/2018 4:49:31 PM EDT
[#6]
The problem is the FSB has to be TDC with the barrel extension pin once the taper pins are installed.
So it matter of jigging the FSB to the barrel on the same plane as the barrel extension pin, and holding that FSB and barrel on that index as the taper pin channels are drilled through bolt. Hence one you have the jigs built to hold the works together on the mill, then the rest is a snap isntead. |
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