[ARCHIVED THREAD] - installing A2 front sight base

Posted: 11/29/2015 7:11:51 PM EDT

Hey:
I have a CMMG .22 upper that came with a gas block, wife wants the front A2 standard front sight, that is what she has at work and prefers that, I happen to have one that I removed from a PSA rifle, I can not tell if the barrell is pre-drilled or not, is it possible to do this or does the base and barrell have to be drilled together? I remember reading something like that a while ago.

Posted: 11/29/2015 10:18:24 PM EDT

[#1]

Normally, you drill a virgin front sight base to a virgin barrel.

Posted: 11/29/2015 10:26:09 PM EDT

[#2]

Send the barrel to ADCO and have them drill the barrel and a new front sight base together.

Posted: 11/29/2015 11:26:55 PM EDT

[#3]

folks tap the FSB pin holes to use 8-32 or 10-32 set screws...you can re-use the fsb on the 22lr brl w/o having to send it out for gunsmithing.

Posted: 12/2/2015 2:25:27 AM EDT

[#4]

[youtube]https://www.youtube.com/watch?v=qRvbX_CzmYk[/youtube]

I saw this guy's idea, it kinda makes sense

Posted: 12/2/2015 9:19:58 AM EDT

[#5]

Quote History

Quoted:
folks tap the FSB pin holes to use 8-32 or 10-32 set screws...you can re-use the fsb on the 22lr brl w/o having to send it out for gunsmithing.

View Quote

I've done this to 4 of my AR FSB it easy with virgin & FSB with tapper holes.

[ARCHIVED THREAD] - installing A2 front sight base

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[ARCHIVED THREAD] - installing A2 front sight base

[ARCHIVED THREAD] - installing A2 front sight base