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Posted: 4/17/2006 7:26:21 AM EST
I am building a 20" A2 service rifle and I ordered a set screw FSB. I had noticed when I got it that it is an "F" marked base. Will this throw off my zero due to the extra height or will it be ok?

Thanks,
Justin
Link Posted: 4/17/2006 7:30:28 AM EST
You may have problems if you're running an A2 upper receiver. What do you mean by set screw? Like armalite does without the pins?

Link Posted: 4/17/2006 7:41:44 AM EST

Originally Posted By markm:
You may have problems if you're running an A2 upper receiver. What do you mean by set screw? Like armalite does without the pins?




The F-sight base has to be used with the taller Colt detachable carry hand or corresponding rear sights.

The set screw front bases I have experience with are designed to be used with windage flats. The set screws are drilled and tapped in where the pins would normally be and line up with flats machined into the barrel.


Link Posted: 4/17/2006 7:41:47 AM EST
Well, kinda, its not the same as the armalite, it has setscrews where the taper pins would normally be. I have one of them too but the sling swivel on the FF tube gets in the way of the armalite FSB
Link Posted: 4/17/2006 12:40:06 PM EST

Originally Posted By markm:
You may have problems if you're running an A2 upper receiver. What do you mean by set screw? Like armalite does without the pins?





No he won't.


All he needs do is screw the sight blade down about 4 -5 notches.

You know. Those cute little cutout thingies around the sight base
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