Back Up Sight with an ACOG

"A pistol is what you use to fight your way back to the rifle you never should have left behind!" Clint Smith, Thunder Ranch

Moderators: carlson1, Keith B


Topic author
LTUME1978
Senior Member
Posts in topic: 1
Posts: 305
Joined: Wed Nov 18, 2009 12:25 pm
Location: Alvin, TX

Back Up Sight with an ACOG

#1

Post by LTUME1978 » Tue Jan 01, 2013 1:30 pm

I have an ACOG on my M-4. Any suggestions on what to do for a back up sight? I had though about removing the ACOG, installing the back up sight (sight that came with the rifle) and sighting it in, then removing it and reinstalling the ACOG. How repeatable is this? Hoping someone here can offer a better option.

User avatar

williamkevin
Senior Member
Posts in topic: 1
Posts: 528
Joined: Fri Feb 20, 2009 5:10 pm
Location: EL29LM

Re: Back Up Sight with an ACOG

#2

Post by williamkevin » Tue Jan 01, 2013 1:59 pm

LTUME1978 wrote:I have an ACOG on my M-4. Any suggestions on what to do for a back up sight? I had though about removing the ACOG, installing the back up sight (sight that came with the rifle) and sighting it in, then removing it and reinstalling the ACOG. How repeatable is this? Hoping someone here can offer a better option.
You might look at something like this.....
http://soldiersystems.net/2011/07/03/ka ... ng-sights/

Just do a search for "offset backup sights" on most search engines. There are a lot of different styles available.
Member-Brilliant Backstraps Shooting Team
"Ueniant et auferant illud"


PanhandleofTX
Junior Member
Posts in topic: 1
Posts: 1
Joined: Tue Jan 01, 2013 9:42 pm

Re: Back Up Sight with an ACOG

#3

Post by PanhandleofTX » Tue Jan 01, 2013 10:28 pm

Troy makes a low profile flip up sight that you might be interested in.

User avatar

MadMonkey
Senior Member
Posts in topic: 3
Posts: 1229
Joined: Mon Nov 09, 2009 3:23 am
Location: Grapevine, TX

Re: Back Up Sight with an ACOG

#4

Post by MadMonkey » Tue Jan 01, 2013 10:53 pm

I have an ACOG on my 20" AR, and use a 45 degree mount with a Burris FastFire III mounted on it. It was difficult to sight in, but it seems to work well.
"Rebellion to tyrants is obedience to God" - Benjamin Franklin

User avatar

The Annoyed Man
Senior Member
Posts in topic: 6
Posts: 23844
Joined: Wed Jan 16, 2008 12:59 pm
Location: North Richland Hills, Texas
Contact:

Re: Back Up Sight with an ACOG

#5

Post by The Annoyed Man » Wed Jan 02, 2013 12:15 am

My AR has an "ACOG-like" optic—a Burris AR536. Like the ACOG, it does not have a long eye relief, and it is fixed power (5X). Consequently it hangs over the rear flip up sight, preventing it from being deployed unless the scope is removed. you can get a quick release mount for your ACOG that is guaranteed to return to within 1 MOA of zero after removing and then remounting the scope. That is close enough to zero to still be usable at any distance you're likely to use an AR. So if I pop off the optic, I can deploy the rear sight. BUT.....there's more! I have a Burris FastFire II reflex sight mounted on top of the AR536, and that is zeroed for 25 yards. So the BUIS are literally for a last resort.
Give me Liberty, or I'll get up and get it myself.—Hookalakah Meshobbab
I don't carry because of the odds, I carry because of the stakes.—The Annoyed Boy

User avatar

The Annoyed Man
Senior Member
Posts in topic: 6
Posts: 23844
Joined: Wed Jan 16, 2008 12:59 pm
Location: North Richland Hills, Texas
Contact:

Re: Back Up Sight with an ACOG

#6

Post by The Annoyed Man » Wed Jan 02, 2013 12:16 am

MadMonkey wrote:I have an ACOG on my 20" AR, and use a 45 degree mount with a Burris FastFire III mounted on it. It was difficult to sight in, but it seems to work well.
Which 45º mount did you use for the FastFire?
Give me Liberty, or I'll get up and get it myself.—Hookalakah Meshobbab
I don't carry because of the odds, I carry because of the stakes.—The Annoyed Boy

User avatar

gigag04
Senior Member
Posts in topic: 1
Posts: 5474
Joined: Wed May 04, 2005 7:47 pm
Location: Houston
Contact:

Re: Back Up Sight with an ACOG

#7

Post by gigag04 » Wed Jan 02, 2013 2:50 am

Offset RDS. DR Optic, for example:

Image

Image

More reading:
http://www.ar15.com/archive/topic.html? ... 8&t=507079" onclick="window.open(this.href);return false;

http://www.m4carbine.net/showthread.php?t=68459" onclick="window.open(this.href);return false;
Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison

User avatar

MadMonkey
Senior Member
Posts in topic: 3
Posts: 1229
Joined: Mon Nov 09, 2009 3:23 am
Location: Grapevine, TX

Re: Back Up Sight with an ACOG

#8

Post by MadMonkey » Wed Jan 02, 2013 9:31 am

The Annoyed Man wrote:
MadMonkey wrote:I have an ACOG on my 20" AR, and use a 45 degree mount with a Burris FastFire III mounted on it. It was difficult to sight in, but it seems to work well.
Which 45º mount did you use for the FastFire?
Uh... good question "rlol"

IIRC it was a cheapo I threw into an order from PSA, figuring I could find some use for it.
"Rebellion to tyrants is obedience to God" - Benjamin Franklin


Abraham
Senior Member
Posts in topic: 2
Posts: 8019
Joined: Tue Aug 14, 2007 8:43 am

Re: Back Up Sight with an ACOG

#9

Post by Abraham » Wed Jan 02, 2013 10:58 am

Acog vs Burris

Differences or maybe similarities...?

Thanks

User avatar

The Annoyed Man
Senior Member
Posts in topic: 6
Posts: 23844
Joined: Wed Jan 16, 2008 12:59 pm
Location: North Richland Hills, Texas
Contact:

Re: Back Up Sight with an ACOG

#10

Post by The Annoyed Man » Wed Jan 02, 2013 1:25 pm

Abraham wrote:Acog vs Burris

Differences or maybe similarities...?

Thanks
The Burris is the poor-man's ACOG. The Burris AR536 and AR332 are the same optic, but the former is a 5X36mm and the latter is a 3X32mm. All three have fairly short eye relief and, at least in my experience, work better with the rifle stock collapsed than with it extended.
Image

The Burris optics have the same reticles and everything, and only vary by magnification power. They both have the same reticle, which is a fairly well thought out bullet drop compensating reticle which is regulated for 55 and 62 grain bullets out to 600 yards. The reticle is illuminated and can be set to red or green at 5 levels of brightness. When the illumination is off, you still have the black reticle with the same BDC regulation.

The Burris AR332 & AR536 reticle:
ImageImage
Image

The ACOGs are all fixed power if I remember correctly, and the most popular magnification level seems to be 4X, although there are others. The better ones, have a fiberoptic doodad on the top which illuminates the reticle, and if I'm not mistaken, the higher end ones also have a tritium insert and/or batteries to power the reticle in lowlight/darkness. The reticles I have seen are fairly simple, but easy to use.
Image

Sample ACOG reticles (not by any means the ONLY reticles):
ImageImage

The clarity of glass on the Burris is fairly decent, but on the ACOG it is superb. Trijicon scopes have REALLY good glass. I paid $399.00 for my AR536, and I think that AR332s are going for around $339.00. A decent ACOG will set you back around $1,000.00 on up, depending on model.

Hope this helps.
Give me Liberty, or I'll get up and get it myself.—Hookalakah Meshobbab
I don't carry because of the odds, I carry because of the stakes.—The Annoyed Boy


Abraham
Senior Member
Posts in topic: 2
Posts: 8019
Joined: Tue Aug 14, 2007 8:43 am

Re: Back Up Sight with an ACOG

#11

Post by Abraham » Wed Jan 02, 2013 1:40 pm

TAM,

It helps immensely and thank you, thank you very much!

User avatar

jdhz28
Member
Posts in topic: 1
Posts: 175
Joined: Thu Jan 06, 2011 2:45 pm

Re: Back Up Sight with an ACOG

#12

Post by jdhz28 » Wed Jan 09, 2013 7:10 am

I too have a Burris mounted on one of my Ar's and it is a great optic...I do like these for back ups

http://www.amazon.com/Front-Degree-Rapi ... IBRPRWLZIH
Nemo Me Impune Lacessit


Z1166
Member
Posts in topic: 1
Posts: 69
Joined: Thu Jun 09, 2011 10:29 pm

Re: Back Up Sight with an ACOG

#13

Post by Z1166 » Wed Jan 16, 2013 7:46 pm

If you are a right handed shooter, would it make more sense to have the offset red dot/reflex sight on the left side of the rifle?
:fire :reddevil

User avatar

MadMonkey
Senior Member
Posts in topic: 3
Posts: 1229
Joined: Mon Nov 09, 2009 3:23 am
Location: Grapevine, TX

Re: Back Up Sight with an ACOG

#14

Post by MadMonkey » Wed Jan 16, 2013 8:00 pm

Z1166 wrote:If you are a right handed shooter, would it make more sense to have the offset red dot/reflex sight on the left side of the rifle?
Not for me. A quick counter-clockwise twist and I'm looking straight down it... clockwise would be uncomfortable.
"Rebellion to tyrants is obedience to God" - Benjamin Franklin

User avatar

AndyC
Senior Member
Posts in topic: 1
Posts: 9841
Joined: Sun Aug 12, 2007 12:34 pm
Location: Richardson, TX

Re: Back Up Sight with an ACOG

#15

Post by AndyC » Wed Jan 16, 2013 9:56 pm

Z1166 wrote:If you are a right handed shooter, would it make more sense to have the offset red dot/reflex sight on the left side of the rifle?
Generally-speaking, nope. It's a simpler and stronger movement for the right wrist to twist inward towards the chest (while holding a rifle in the regular shooting position) than outward - which would put a right-side optic into view easily.
Remember Kitty Genovese

Image

Amateurs skip safety-checks - pros don't.
Preferred Travel Agent - 72 Virgins Dating Club
There's nothing quite like the offer of 230 grains to a man's chest to remind him of his manners

Post Reply

Return to “Rifles & Shotguns”