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AR15.COM
7/6/2017 10:57:34 PM EDT
Is this normal or is something wrong? I've tried it on two uppers so far with the same results.

Attached File
7/6/2017 10:59:23 PM EDT
[#1]
I don't think it's an issue, it's just the way it fits your rail.
7/6/2017 11:48:36 PM EDT
[#2]
Quote History
Quoted:
I don't think it's an issue, it's just the way it fits your rail.
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It fits the same on a PSA, Aero, and RRA upper so I guess it's normal.
7/7/2017 9:15:08 AM EDT
[#3]
It is normal, the sheer lugs will have a gap at the bottom. As long as the 1/2 nuts are snugged, you are good to go!

-Geissele Customer Service
7/7/2017 9:37:57 AM EDT
[#4]
I have also noticed that usually only 1 lug will make contact when the mount is pushed forward all the way. I have often wondered why multiple lugs were used in the design, considering it's a near physical impossibility that all 4+ will actually abut the rail slots identically, but as long as ONE of them does so squarely, and the 1/2" nuts are even remotely snug, it is just fine.
7/7/2017 9:46:44 AM EDT
[#5]
Quote History
Quoted:
I have also noticed that usually only 1 lug will make contact when the mount is pushed forward all the way. I have often wondered why multiple lugs were used in the design, considering it's a near physical impossibility that all 4+ will actually abut the rail slots identically, but as long as ONE of them does so squarely, and the 1/2" nuts are even remotely snug, it is just fine.
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Yeah, we would need a Super Precision upper with tolerances exactly matched to the scope mounts to use all four lugs.

It does seems likely that four lugs would give a higher probability of two lugs touching than a standard two lug mount.
7/7/2017 9:51:28 AM EDT
[#6]
Quote History
Quoted:

Yeah, we would need a Super Precision upper with tolerances exactly matched to the scope mounts to use all four lugs.

It does seems likely that four lugs would give a higher probability of two lugs touching than a standard two lug mount.
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Agreed, but falls under the "doesn't matter" heading. I just found it interesting they use 4. I've seen 1 lug imprint maybe 1 thou or so, so I understand 2. I just found four superfluous, but it LOOKS sexy.
7/7/2017 10:30:26 AM EDT
[#7]
Good to know that it's normal, thanks!

Now on to the next issue, this isn't the mount I ordered . I've already sent an email so no worries.