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9/16/2019 10:09:13 PM
Posted: 3/28/2009 2:24:39 PM EDT
I just got back from the range. I brought my Bushy. I just put a LaRue BUIS on it. I was zeroing it and had to move the front sight post wwaaaayyyyy up. This same rifle with the removeable carry handle was very accurate. Now it shoots real high. Do they make different front posts? If they do which one do I need and where do I get them? FYI it does not have an "F" marked from sight base.
Oh yeah.....do they make a tool for adjusting the post cause using a bullet tip is scratching the shit out of the front sight.
Thanks in advance for the help.
Link Posted: 3/28/2009 2:27:57 PM EDT
[Last Edit: 3/28/2009 2:28:42 PM EDT by Darkstar117]
Sounds like you need a .040 higher front sight, and yes they make a front sight tool.
Link Posted: 3/28/2009 2:30:31 PM EDT
Originally Posted By Darkstar117:
Sounds like you need a .040 higher front sight, and yes they make a front sight tool.


This^

Link Posted: 3/28/2009 2:40:47 PM EDT
Link Posted: 3/28/2009 2:43:20 PM EDT
[Last Edit: 3/28/2009 2:46:20 PM EDT by TacticalConcepts]
find it at this page:

http://www.bushmaster.com/products.asp?cat=21

A2 Front Sight Post for Flat-Top Colts

part number: 9349056-M

Bushmaster will mail direct to you.

Mark


ETA - Darkstar...sorry when I posted, I could see your links. Now I see them
Link Posted: 3/28/2009 2:56:48 PM EDT
Thanks guys. I just placed the order. I guess the height of the rear sight on the carry handle and the height of the LaRue BUIS is way different huh?
Link Posted: 3/28/2009 3:59:24 PM EDT
Originally Posted By rageracing:
Thanks guys. I just placed the order. I guess the height of the rear sight on the carry handle and the height of the LaRue BUIS is way different huh?

That depends on the carry handle. The Larue BUIS is built to milspec height, to be a direct replacement for milspec carry handles, rather than the commercial version :)


Posted Via AR15.Com Mobile
Link Posted: 3/28/2009 4:05:25 PM EDT
Sounds like you have a front sight post and the rear sight you are using is meant to be used with a Front Sight Block with removable sights. One sits higher than the other.
Link Posted: 3/28/2009 4:27:30 PM EDT
[Last Edit: 3/28/2009 4:31:40 PM EDT by CJan_NH]
Originally Posted By Muttt:
Sounds like you have a front sight post and the rear sight you are using is meant to be used with a Front Sight Block with removable sights. One sits higher than the other.

No, it's a known issue when using a milspec BUIS on a non milspec height FSB. More discussion here:

http://www.ar15.com/forums/topic.html?b=3&f=118&t=433994

Molon took this pic to show the difference between the two FSBs:
Link Posted: 3/28/2009 6:27:23 PM EDT
[Last Edit: 3/28/2009 6:27:50 PM EDT by rageracing]
Originally Posted By CJan_NH:
Originally Posted By Muttt:
Sounds like you have a front sight post and the rear sight you are using is meant to be used with a Front Sight Block with removable sights. One sits higher than the other.

No, it's a known issue when using a milspec BUIS on a non milspec height FSB. More discussion here:

http://www.ar15.com/forums/topic.html?b=3&f=118&t=433994

Molon took this pic to show the difference between the two FSBs:
http://home.comcast.net/~cjan99999/FSB.jpg


Thanks for the pic. Now I understand what happened.

Link Posted: 3/28/2009 7:47:23 PM EDT
Originally Posted By rageracing:
Originally Posted By CJan_NH:
Originally Posted By Muttt:
Sounds like you have a front sight post and the rear sight you are using is meant to be used with a Front Sight Block with removable sights. One sits higher than the other.

No, it's a known issue when using a milspec BUIS on a non milspec height FSB. More discussion here:

http://www.ar15.com/forums/topic.html?b=3&f=118&t=433994

Molon took this pic to show the difference between the two FSBs:
http://home.comcast.net/~cjan99999/FSB.jpg


Thanks for the pic. Now I understand what happened.



Cool, thanks for the education. Keeps me from giving out bad dope.
Link Posted: 3/29/2009 2:50:12 AM EDT
Originally Posted By rageracing:
I just got back from the range. I brought my Bushy. I just put a LaRue BUIS on it. I was zeroing it and had to move the front sight post wwaaaayyyyy up. This same rifle with the removeable carry handle was very accurate. Now it shoots real high. Do they make different front posts? If they do which one do I need and where do I get them? FYI it does not have an "F" marked from sight base.
Oh yeah.....do they make a tool for adjusting the post cause using a bullet tip is scratching the shit out of the front sight.
Thanks in advance for the help.


CLP and tooth brush will take off the copper marks
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