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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/5/2005 6:55:13 AM EDT
Hey guys,

I have both front and rear (300m) Knights Armament BUIS. I have them mounted on a LMT upper with a Knights Mid-Length RAS. I installed them and took them to the range but I have to screw the front sight all the way out to get a 50yrd zero. If I go two more clicks up the sight post will fallout of the sight base. Is there some way to fix this where my zero is in the middle of the range of movement? Can I get a longer sight post or can I install them differently to correct this?

Thanks for your help!

Cheers,

Bill
Link Posted: 8/5/2005 7:16:48 AM EDT
You can get a longer sight post to correct for this. Bushmaster sells them.
Link Posted: 8/5/2005 7:24:39 AM EDT
sounds like there is something wrong.

why wouldnt kac front and rear sights work together?


Link Posted: 8/5/2005 7:27:25 AM EDT
Did you try zeroing at 25yds since that is the distance that KAC recommends?
Link Posted: 8/5/2005 7:40:15 AM EDT
[Last Edit: 8/5/2005 7:40:38 AM EDT by wea]

Originally Posted By altav:
Did you try zeroing at 25yds since that is the distance that KAC recommends?



Yes I did try a 25yrd zero and that gives me about 4-6 more clicks down. (Can't remember exactly?) But I'm not too happy with having the zero so close. I was under the impression a 50yrd zero gave the best results over most distances.

I will also check on the longer sights on Bushmaster...

Thanks for your help!

Cheers,

Bill
Link Posted: 8/5/2005 7:41:19 AM EDT
[Last Edit: 8/5/2005 7:42:24 AM EDT by markm]
Stand by.
Link Posted: 8/5/2005 10:21:44 AM EDT

Originally Posted By altav:
Did you try zeroing at 25yds since that is the distance that KAC recommends?



Nobody recommends zeroing at 25yards. It's either 25 meters (27.3 yards - which is usually a 1 click difference) or 50 yards.

Yes WEA the 50yard zero is superior.
Link Posted: 8/5/2005 10:30:37 AM EDT
[Last Edit: 8/5/2005 11:56:30 AM EDT by altav]

Originally Posted By Forest:

Originally Posted By altav:
Did you try zeroing at 25yds since that is the distance that KAC recommends?



Nobody recommends zeroing at 25yards. It's either 25 meters (27.3 yards - which is usually a 1 click difference) or 50 yards.

Yes WEA the 50yard zero is superior.



Opps, wrote yds when I meant m - my bad.

ETA: Are you trying to zero with the plastic insert in or out?
Link Posted: 8/5/2005 9:39:48 PM EDT

ETA: Are you trying to zero with the plastic insert in or out?


I have the plastic insert in. Not so sure I need the restricted peep. Is it best in or out?

Cheers,

Bill
Link Posted: 8/6/2005 12:49:38 AM EDT
I had the same problem with my KAC front sight on my 9mm and on my midlength.I am going to try Bushmasters longer front sight post.SJR556.
Link Posted: 8/6/2005 4:54:21 AM EDT

Originally Posted By wea:
Hey guys,

I have both front and rear (300m) Knights Armament BUIS. I have them mounted on a LMT upper with a Knights Mid-Length RAS. I installed them and took them to the range but I have to screw the front sight all the way out to get a 50yrd zero. If I go two more clicks up the sight post will fallout of the sight base. Is there some way to fix this where my zero is in the middle of the range of movement? Can I get a longer sight post or can I install them differently to correct this?

Thanks for your help!

Cheers,

Bill



Keep in mind that the 300 meter BUIS you have was required to provide a 300 meter point of aim = point of impact. So the front sight issue you describe is comon when one attemps a shorter range zero. That is one of the reasons our (KAC) alternative BUIS (2-600M) starts out at 200 meters. However, a taller FSP is the easy answer.
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