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Posted: 1/19/2015 10:59:39 PM EDT
this photo from the net sums it up
the threads do not go all the say back, the gap is the diameter of the major threads, and when I put a can on the rifle there is a gap. I don't want to have to machine the barrel or the cans if I have to. Can I use a shim? I know washers are bad but what about a wave washer? |
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Posted: 1/19/2015 11:03:11 PM EDT
[#1]
Quoted:
this photo from the net sums it up http://www.gunsumerreports.com/Remington_700_SPS_Tactical_AAC-SD/Remington_700_SPS_Tactical_AAC-SD_049.JPG the threads do not go all the say back, the gap is the diameter of the major threads, and when I put a can on the rifle there is a gap. I don't want to have to machine the barrel or the cans if I have to. Can I use a shim? I know washers are bad but what about a wave washer? If the threads are cut to spec, and concentric it wont hurt a thing to use a crush washer. |
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Posted: 1/19/2015 11:07:27 PM EDT
[#2]
I had the same problem with my 700 AAC-SD. I used shims.
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Posted: 1/20/2015 3:39:20 AM EDT
[#3]
Ah, that Remington QC.
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Posted: 1/20/2015 8:44:11 AM EDT
[#4]
mine is the same way, i cut my form 1 can, so it would shoulder...id say all those guns where spec'd to use a AAC QD mount. early guns shipped with one.
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Posted: 1/20/2015 9:09:59 AM EDT
[#5]
I'd buy a jam nut for it to shoulder on.
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Posted: 1/20/2015 9:51:57 AM EDT
[#6]
Quote HistoryQuoted: Ah, that Remington QC.  |
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Posted: 1/20/2015 9:52:52 AM EDT
[#7]
AAC's "special" thread spec for 5/8x24 direct thread doesn't call for a thread relief. I guess they are counting on a counterbore on the thread mount.
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Posted: 1/20/2015 12:56:43 PM EDT
[#8]
Quote HistoryQuoted:
Ah, that Remington QC. Doesn't look like a quality control issue to me |
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Posted: 1/20/2015 2:04:41 PM EDT
[#9]
Quote HistoryQuoted:
I had the same problem with my 700 AAC-SD. I used shims. What shims? Jam nut? |
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Posted: 1/20/2015 2:14:25 PM EDT
[#10]
My cmmg was the same way. I used a crush washer.
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Posted: 1/20/2015 3:46:29 PM EDT
[#11]
A crush washer is to NEVER be used on a Gemtech can. It is spelled out on their site and in the instructions. I wouldn't use one on any can.
A shim can be used, however, a relief cut is what is missing on those threads. Some suppressors have a slight bevel at the entrance of the threads to ease installation, and to clear this area in the event a relief cut is missing. If your can doesn't bottom out on the shoulder, or on shims, you will have an end cap strike. This is how I found out about this issue. Luckily mine was very light and I notice my bullets tumbling by the special sound that makes.  Wave washers are a bad idea too. I have had it happen a few times. I have sent can adapters back to have them cut properly. I have also sent two barrels back. |
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Posted: 1/20/2015 3:50:38 PM EDT
[#12]
Quote HistoryQuoted: What shims? Jam nut? Quote HistoryQuoted: Quoted: I had the same problem with my 700 AAC-SD. I used shims. What shims? Jam nut? |
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