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Posted: 4/26/2017 1:47:56 PM EDT
[#1]
You don't have the MD mounted with a crush washer do you?
If so that crush washer needs to go. If the MD needs timing solid shims are the way to go. |
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Posted: 4/26/2017 2:06:17 PM EDT
[#2]
Quoted:
I shot my suppressor for the first time today. Wow, what a difference! I'm happy with the groups I'm getting with it mounted but was a bit surprised by how much the POI changed. POI shifted almost 8" low and 1" left. I expected a change but damn that seems drastic. Will this cause any problems when shooting at distance. Anyone else seeing a POI shift that large. Rifle is .223, 18" barrel and I'm shooing a Smith Enterprise Windtalker suppressor mounted on a Vortex flash hider. So for "Zero Height" input -8.0 For "Zero Offset" input 1.0 Of course doing this you will have to dial even at 100yds. |
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Posted: 4/26/2017 2:15:35 PM EDT
[#3]
Quote HistoryQuoted:
You don't have the MD mounted with a crush washer do you? If so that crush washer needs to go. If the MD needs timing solid shims are the way to go. |
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Posted: 4/26/2017 5:45:38 PM EDT
[#4]
the 1" shift is not bad but that 8" is a bit much. i'd be a little disappointed and probably just end up making it a dedicated set up.
my AAC newer model m4-2k shifted about 1.5" low and right. i shimmed it to get the windage dialed in, and now just have to compensate for being low. piece of cake now. |
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Posted: 4/26/2017 9:31:22 PM EDT
[#5]
I've checked alignment with a Geissele alignment rod and it passes. I'm thinking it's a combination of the weight(this suppressor is built like a tank and weighs about as much as one) and the fact that it's on an 18" fluted barrel. As long as it's consistent I guess I'm OK with it.
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Posted: 4/26/2017 9:56:25 PM EDT
[#6]
as long as your groups are good, you're fine on alignment.
The shift is coming from the fact that you have about 30 oz of weight on the end of your 18" barrel. If you want less shift, going down to 16" would help a little bit, but going to a lighter suppressor (omega with titanium parts is only 11 oz) would help the most. |
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Posted: 4/26/2017 10:12:07 PM EDT
[#7]
Quote HistoryQuoted:
No crush washer, shims or anything like that. I'm getting good groups, about the same as I'm getting unsuppressed. Guess I just expected more like a 1"-2" shift. |
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Posted: 4/27/2017 10:54:43 AM EDT
[#8]
AAC 7.62AD, 51T mount.
Was my first can and a good deal $-wise. Has been disappointing precision-wise. Ruger RPR is easily MOA all day if I don't flake out. With SD on routinely getting 1.5-1.75" at 100. But more to the point, zero'd at 100 - when SD attached impact drops 4" and slightly left. I guess I'm not alone in that much change. Should have researched more on suppressors and mounts for precision application. |
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