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Posted: 10/19/2003 1:35:11 PM EDT
Hello. Okay I need your help. I am trying to decide between the ARMS SIR #46 and the #50 Bi-level rail. I want to mount an Aimpoint Comp ML2 on the SIR. I already have the ARMS Aimpoint mount with the forward extending spacer. Which SIR is best for this optic? Is it better to mount the Aimpoint forward or rearward on the SIR? Also, I know that the SIR comes with at least one side rail that has a sling attachment. Do the SIR's have the same rail on the opposite side? What I mean is do the SIR's have a side rail on each side? I want to mount a Surefire M962 on the right side of the SIR and attach my SOP sling on the left. Or is it possible to mount the M962 with throw lever mount on the bottom and still have enough room for a vertical grip? If you can help me out with these questions that would be great. Thank you
Link Posted: 10/19/2003 2:30:19 PM EDT
I would suggest taking the extention spacer off the ARMS Aimpoint mount. Its easy to take off. Just loosen the large slotted screws on the underside. when you take it off, put the ring half back on the mount half using only the two smallest screws. Now you can use the mount on the top rail of the SIR. If you dont plan to mount the Aimpoint too far over the barrel, I would go ahead and get the #50 SIR, simply because its a little cheaper. If you wanted to mount the Aimpoint over the barrel a little more, get the #46, that will give you the uninturrupted top rail. All SIRs I am aware of come with three add on rails. Two shorter ones (marked 1 and 2), and one longer one (marked 3). The #1 rail has a side sling mount screwed in to it. Any one of these rails can be used on either side or the bottom of the SIR, so you will have plenty of rail space to mount whatever you'd like.
Link Posted: 10/19/2003 10:12:20 PM EDT
Thanks for the info.
Link Posted: 10/19/2003 10:32:28 PM EDT
I'm sure there in a reason for the bi-level, but I don't know what it is. I've got the #45. Works great! The farther you mount your aimpoint down the rifle, the easier it will be to aquire a target using both eyes open. new-arguy is right about the rails. I keep the longer of the three on the bottom of the guard. The rails are not very large but, they can be placed at different areas along the SIR. It is a very versitile system.
Link Posted: 10/20/2003 1:38:56 PM EDT
Originally Posted By newbe: I'm sure there in a reason for the bi-level, but I don't know what it is.
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Sighting systems like the EOTech that are designed to be at the same height as the iron sights when mounted at the height of the reeceiver rail but will completely block the irons if mounted on a regular SIR.
Link Posted: 10/20/2003 10:11:41 PM EDT
Ahhhh. That makes sense. I was wondering why the only time I see the EOTech mounted on a SIR is with the bi-level system. Thanks.
Link Posted: 10/21/2003 7:33:16 AM EDT
People use the Eotech on sirs that are not bi-level. I think the advantage of the bilevel is the ability to co-witness the sights. Look in the optics section. There are guys that have way more information on this than me.
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