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Posted: 4/30/2009 11:16:56 PM EDT
Looking to order the 512  to put on a flat top Bushmaster and am curious as to whether i should put a riser under it to ensure the dot clears the fixed front sight.  If so a specific model  riser recommendation would be appreciated.
Link Posted: 4/30/2009 11:20:04 PM EDT
I have a 512 on my  16" flat top RRA...

No need for a riser...
Link Posted: 5/1/2009 1:34:06 AM EDT
It depends on whether you want to 1/3 co-witness or absolute co-witness your red dot. I like absolute, so I use no riser.
Link Posted: 5/1/2009 3:24:35 AM EDT
No riser here either.
Link Posted: 5/1/2009 3:32:26 AM EDT
Originally Posted By Hero:
It depends on whether you want to 1/3 co-witness or absolute co-witness your red dot. I like absolute, so I use no riser.


This, I prefer the 1/3 co-witness for Aimpoints but if using an eotech I prefer not to use a riser.  As of right now there is a 512 on my LMT with no riser and KAC 300m rear site.
Link Posted: 5/1/2009 3:35:24 AM EDT
I prefer a riser for a lower 1/3 cowitness for my 512. Less sight picture interference and more comfortable cheek weld to boot.  I prefer the the LaRue mount... simple and SOLID.

I'd recommend checking out an Aimpoint T-1 before you order the 512 though.  I own both, and I liek them both, but as I discovered in a recent Carbine class, for ME, teh T-1 was faster, easier to use, lighter... just BETTER. YMMV, but you owe it to yourself to check it out.  I used to be a total EOTech fanboy until I used them side by side in the class.
Link Posted: 5/1/2009 3:46:55 AM EDT



Originally Posted By renesis:



Originally Posted By Hero:

It depends on whether you want to 1/3 co-witness or absolute co-witness your red dot. I like absolute, so I use no riser.




This, I prefer the 1/3 co-witness for Aimpoints but if using an eotech I prefer not to use a riser.  As of right now there is a 512 on my LMT with no riser and KAC 300m rear site.


No riser here, no problems.  



 
Link Posted: 5/1/2009 3:53:23 AM EDT
No riser here either.
Link Posted: 5/1/2009 4:02:56 AM EDT
No riser, and I use a GG&G accucam QD mount.

Link Posted: 5/1/2009 4:28:57 AM EDT
Nice pic M4. I need one of those GG&G QDs.
Link Posted: 5/1/2009 4:53:10 AM EDT
When I had my 512 I didn't use a riser, and I never had a problem with it.
Link Posted: 5/1/2009 5:06:07 AM EDT
no riser for me, I have a Troy rear BUIS and my EOTech co-witnessed with my irons.  I don't even notice the front sight when using the EOTech.  One thing I really like about a co-witness is you get instant verification that your EOTech is zeroed.
Link Posted: 5/1/2009 9:27:24 AM EDT
No riser for me, although I have a flip up front sight.
Link Posted: 5/1/2009 9:42:52 AM EDT
[Last Edit: 5/1/2009 9:43:12 AM EDT by 230grains]
I have mine set up with no riser, for absolute co-witness. I'm actually considering switching though, have a fixed front sight on the rifle it's on.
Link Posted: 5/1/2009 9:48:57 AM EDT
Originally Posted By M4builder:
No riser, and I use a GG&G accucam QD mount.

http://i192.photobucket.com/albums/z96/M4builder/ARFCOM/A15.jpg


Same here. However, when using a red dot the shooter should be focusing on the target & not the dot to begin with. Therefore it doesn't matter that the FSP is "in the way" because it will become a ghost image or shadow which shouldn't affect your sight picture.
Link Posted: 5/1/2009 10:00:26 AM EDT
Originally Posted By Hero:
It depends on whether you want to 1/3 co-witness or absolute co-witness your red dot. I like absolute, so I use no riser.


Not to hijack the thread , but... What is a 1/3 co witness?
Link Posted: 5/1/2009 10:10:07 AM EDT
Originally Posted By ctznken:
Originally Posted By Hero:
It depends on whether you want to 1/3 co-witness or absolute co-witness your red dot. I like absolute, so I use no riser.


Not to hijack the thread , but... What is a 1/3 co witness?


If I'm not mistaken, its having the BUIS visible and lining up in the lower 1/3 of the field of view through the red dot sight.  

Link Posted: 5/1/2009 10:14:48 AM EDT
Originally Posted By martin_j001:
Originally Posted By ctznken:
Originally Posted By Hero:
It depends on whether you want to 1/3 co-witness or absolute co-witness your red dot. I like absolute, so I use no riser.


Not to hijack the thread , but... What is a 1/3 co witness?


If I'm not mistaken, its having the BUIS visible and lining up in the lower 1/3 of the field of view through the red dot sight.  



This
Link Posted: 5/1/2009 10:19:36 AM EDT
Link Posted: 5/1/2009 10:23:59 AM EDT



Originally Posted By Forest:





Originally Posted By Hawkeye59:

Looking to order the 512 to put on a flat top Bushmaster and am curious as to whether i should put a riser under it to ensure the dot clears the fixed front sight. If so a specific model riser recommendation would be appreciated.


I prefer using my EOTechs with the LaRue EOTech mount.  It puts the front sight in the lower 1/3 and gives you quick detach capability with absolute return to zero.



+1 to this



 
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