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Posted: 7/8/2018 10:57:25 PM EDT
I recently finished a 9mm SBR using an A1 upper and standard FSB. I had to order the rear aperture separately, and wasn't all that easy to find. The peep diameters are the same on both, which I assume one is for longer ranges (didn't make any difference out to 25 yards with the 9mm). Will a dual peep A2 rear aperture work? I'd like to get a larger rear peep for the 9mm...
Link Posted: 7/9/2018 4:27:18 AM EDT
It will work fine.
Link Posted: 7/9/2018 11:23:43 AM EDT
A local Sheriffis office had a couple of AR-15’s with A-1 rear sights. One deputy struggled in low light & CQB drills with the small aperatures so a local gun smith drilled out one of the two aperatures. After being drilled out the smith used cold blue to darken the aperature and it was very difficult to tell it didn’t come that way from the factory. Worked great for the deputy.
Link Posted: 7/9/2018 4:00:33 PM EDT
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Originally Posted By VASCAR2:
A local Sheriffis office had a couple of AR-15’s with A-1 rear sights. One deputy struggled in low light & CQB drills with the small aperatures so a local gun smith drilled out one of the two aperatures. After being drilled out the smith used cold blue to darken the aperature and it was very difficult to tell it didn’t come that way from the factory. Worked great for the deputy.
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Was gonna suggest a similar fix
Link Posted: 7/9/2018 4:05:12 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By VASCAR2:
A local Sheriffis office had a couple of AR-15’s with A-1 rear sights. One deputy struggled in low light & CQB drills with the small aperatures so a local gun smith drilled out one of the two aperatures. After being drilled out the smith used cold blue to darken the aperature and it was very difficult to tell it didn’t come that way from the factory. Worked great for the deputy.
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Either way would work. Buying an A2 rear sight aperture would just be easier and might be cheaper. They can be found for under 10$.
Link Posted: 7/9/2018 6:30:48 PM EDT
Maybe but gunsmith modified the Deputy's AR-15 rear sight aperature for free. One of the advantages of living in Rural area with friends.
Link Posted: 7/9/2018 10:25:46 PM EDT
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Originally Posted By VASCAR2:
Maybe but gunsmith modified the Deputy's AR-15 rear sight aperature for free. One of the advantages of living in Rural area with friends.
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lol, I'm far far from that. A gun store turned a transfer down to me because he only deals in "tactical and self defense", and I was transferring a C&R Bolt Action.
No, I'm not joking. I have multiple other people I know who he said the exact same thing.
Link Posted: 7/9/2018 11:06:13 PM EDT
[Last Edit: 7/9/2018 11:11:05 PM EDT by VASCAR2]
Not a big deal but I was a full time Police Officer with Credentials and a Gun Shop in a bigger city refused to sell me a hand cuff key. I’ve seen other goofy stuff over the years but overall I’ve had pretty good luck with the good ole boys in rural areas
Link Posted: 9/2/2018 4:47:42 PM EDT
Yes, the A2 rear sight can directly replace the A1.

While doing so, you might also consider installing a windage knob in place of the standard
A1 adjustment drum (?).
Link Posted: 9/3/2018 4:59:25 AM EDT
Or an old school "low light" A1 rear.

https://www.gunpartscorp.com/products/552400A
Link Posted: 9/3/2018 8:17:26 AM EDT
I replaced mine w an AO same plane or was it one from an ARMS sight...? I forget, but its not the original sight & works much better for me.
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