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Page AR-15 » A2 Builds
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Posted: 5/1/2017 2:02:36 PM EDT
I have a budget minded/ assembled rifle with a flat top receiver and A2 front sight post/ gas block. What rear BUIS is compatible with this configuration?
Link Posted: 5/1/2017 2:32:44 PM EDT
[#1]
I used mag-pul BUIS:

https://www.magpul.com/products/mbus-sight-rear
Link Posted: 5/1/2017 2:57:52 PM EDT
[#2]
I use Magpul mbus, Wilson Combat and Matech.

DD A 1.5 rocks too.

Eta:
LMT A2 stand alone is nice also. Or chopped carry handle sight.
Link Posted: 5/1/2017 3:00:53 PM EDT
[#3]
The Smith M&P-15 original came with that setup with a Magpul back up rear sight.
Link Posted: 5/1/2017 4:24:25 PM EDT
[#4]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
The Smith M&P-15 original came with that setup with a Magpul back up rear sight.
View Quote
As did a boatload of 6920s.
Link Posted: 5/2/2017 1:06:04 PM EDT
[#5]
You talking a 20" barrel? If so you won't have any problems. if you're talking a 14.5" carbine then a A2 FSP/GB can cause problems, you'd need a M4/A4 FSB/GB.

William
Link Posted: 5/2/2017 1:49:01 PM EDT
[#6]
I'm going to use a Daniel Defence fixed rear sight on mine.
Link Posted: 5/2/2017 3:07:54 PM EDT
[#7]
Quoted:
I have a budget minded/ assembled rifle with a flat top receiver and A2 front sight post/ gas block. What rear BUIS is compatible with this configuration?
View Quote

Does the fsb have a "F" stamped on it somewhere? Most do these days. The f marked ones are designed to go with flat top uppers and buiss, a real a2 fsb may require a taller sight post, or your sight post just be screwed out quite a bit. Personally, I've never had any issue at all.
Page AR-15 » A2 Builds
AR Sponsor: bravocompany
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