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Posted: 8/6/2005 1:30:44 AM EDT
[#1]
ARMS doesnt make a mount that cowitnesses in the lower 1/3.
The only other option you have is the LaRue mount. |
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Posted: 8/6/2005 1:31:33 AM EDT
[#2]
ARMS 22M68 with full spacer is as tall as you are going to get, but its not quite a 1/3. I recomend a LaRue mount anyway, its the proper height and much stronger, with a more advanced mechanism that retains zero better.
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Posted: 8/6/2005 4:44:56 AM EDT
[#3]
Try a Knights Arms mount. I use one on my flat top, with an Aimpoint, and a ARMS 40. I get a perfect lower 1/3 co witness.
MB |
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Posted: 8/6/2005 5:13:11 AM EDT
[#4]
+1 |
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Posted: 8/6/2005 5:29:26 AM EDT
[#5]
Does anyone know what the actual difference in inches there is between absolute cowitness with a standard Colt FSB, and a lower 1/3 Cowitness? I have an Aimpoint QRP w/spacer in absolute and want to make it lower 1/3 cowitness. Need to know how high a riser I need or which one to use.
TIA |
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Posted: 8/6/2005 7:56:12 AM EDT
[#6]
Thanks for the info but which Larue do I need?
Tall Aimpoint Mount or Cantilever Aimpoint Mount? And who has them... for a good price? Thanks ~Dave |
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Posted: 8/6/2005 9:45:00 AM EDT
[#7]
What the hell is everyone talking about here? The ARMS #22M68 has ALWAYS been designed to cowitness in the bottom 1/3 of the optic.
 The setup  Bottom 1/3 cowitness  Looking through the center of the AimPoint, over the irons. -Troy |
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Posted: 8/6/2005 10:26:21 AM EDT
[#8]
ARMS #22M68 with full or cantilever spacer = Lower absolute co-witness (1.61" above bore)
KAC Reflex Extension mount = Lower absolute co-witness (1.57" above bore) Larue M68CCO straight or cantilever = Lower third co-witness (1.725" above bore) Height Data is from this MSTN Thread. I currently have 3 of the mounts listed (exclude the KAC) so I'm basing my definitions of co-witness types on personal experiences. While you may disagree with my definitions, you cannot dispute the actual heights because Wes knows his s--t.  ETA: Changed co-witness descriptions based upon Grant's post. |
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Posted: 8/6/2005 11:20:23 AM EDT
[#9]
Sounds like I need a half spacer then.
Thanks all. |
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Posted: 8/6/2005 11:46:55 AM EDT
[#10]
ARMS sucks, get a LaRue, and be done with it
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Posted: 8/6/2005 12:51:10 PM EDT
[#11]
Why do you think ARMS sucks? Curious, because I have the ARMS M68 mount and it has served well. |
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Posted: 8/6/2005 3:14:38 PM EDT
[#12]
I'm sure he bases his statement on well documented facts and years of field experience, and not just because Larue is the latest 'must have'. 
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Posted: 8/6/2005 5:01:57 PM EDT
[#13]
 C4 |
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Posted: 8/6/2005 5:04:16 PM EDT
[#14]
Not according to Dick S. He stated to me that the Military requires an absolute co-witness which is what the ARMS #22M68 and full spacer gives you. C4 |
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Posted: 8/6/2005 5:06:17 PM EDT
[#15]
While I do not disagree with your statement, it is MUCH better to explain WHY you like the LT mount of over the ARMS mount (instead of just saying that they "SUCK").  C4 |
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Posted: 8/6/2005 5:33:05 PM EDT
[#16]
Hate to see what everyone says about my QRP.
 Oh well, budget dictates at the moment. At least I don't have to use a Tacpoint and airsoft mount 
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Posted: 8/6/2005 5:42:02 PM EDT
[#17]
Nothin wrong with the QRP. C4 |
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Posted: 8/6/2005 5:57:02 PM EDT
[#18]
Well just read somewhere here that it doesn't hold zero if you take it off, put it back on. but I got the QRP mount and spacer for under $45 new, so I got a decent deal. I'm hoping it will work out OK. |
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Posted: 8/6/2005 5:59:32 PM EDT
[#19]
I never got my QRP to repeat zero 100% of the time, but you might have better luck. Try painting some witness marks on the knob and the mount. This should help. C4 |
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Posted: 8/6/2005 6:04:57 PM EDT
[#20]
I'll try that, thanks for the tip. |
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Posted: 8/6/2005 6:13:53 PM EDT
[#21]
As much respect as I have for Mr. Swan, measurements (and my visual evidence above) don't lie. Perhaps the ARMS mount originally had "absolute" cowitness, but it certainly doesn't anymore, at least with a full-height spacer. And I'm very happy about that, as are most users. -Troy |
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Posted: 8/6/2005 6:17:31 PM EDT
[#22]
This conversation happened recently so no old data. FYI, I have owned the #22M68 and full spacer for years and always thought it was an absolute co-witness. Everyone has their own opinion (including Dick). C4 |
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Posted: 8/6/2005 6:19:15 PM EDT
[#23]
I believe that LaRue is a better product. It is adjustable for different rail tolerances, has no spacer that will always come loose under recoil if you do not loctite it, and holds zero more reliably.
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Posted: 8/6/2005 6:30:17 PM EDT
[#24]
From my personal experience with ARMS mounts, I would agree with you. C4 |
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Posted: 8/9/2005 12:37:26 AM EDT
[#25]
I think anyone who has owned a larue mount truly knows they are great. I love mine and will always own one.
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