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9/30/2013 9:31:04 PM EDT
I am doing a pistol build soon and I want to do an A2 look. I am looking for an A2 upper, and obviously an A2 front sight. My question is, how do you properly mount the A2 sight? I am guessing that a " run of the mill" Pistol barrel will not have the grooves for the A2 pins. Is that correct? Thanks.
9/30/2013 9:38:00 PM EDT
[#1]
NO barrels have the pin holes.

The site is pinned to the barrel at installation, and the holes drilled and reamed only then..  Send your barrel to ADCO.
10/1/2013 4:30:23 AM EDT
[#2]
ok... got it. thanks.
10/1/2013 6:09:17 AM EDT
[#3]
I was originally going to do the same, but found out drilling and pinning was a bigger task than I'd realized after buying the sight. Instead of sending it to ADCO (which I would have done had I continued in that direction), I ended up with the ARMS folding version which clamps on. I am VERY happy with it, and it will give more mounting options for the Aimpoint T1 I will be putting on top.

That said, there are also clamp on A2 sights available, though TBH I wouldn't be happy with one not drilled and pinned if I were building with a standard A2 sight. YMMV.

10/1/2013 9:13:48 AM EDT
[#4]
Heck, I'm Having a hard time finding. 10-11" barrel!! Back order like
Crazy!
10/1/2013 10:15:47 AM EDT
[#5]
There is also a height difference between an "Standard" FSB and a "F height" FSB. Its my understanding is that if you were to SBR or build a carbine, the height difference might be a small problem.



Someone else here might be able to ellaborate on this more.

Posted Via AR15.Com Mobile
10/1/2013 10:23:38 AM EDT
[#6]
I think the F is for flat top. I'm building an A2. Which would or should work with the h bar.
10/7/2013 7:17:56 PM EDT
[#7]
Nobody seems to have these clamp on Armalite's in stock... do they still make them??
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