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January 9, 2019, 08:46 PM | #1 |
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How much shoulder do I need?
Looking at getting a suppressor and just wondering how much shoulder do I need for a direct thread suppressor with 5/8X24 threads. I have a couple rifles already threaded as such, and have a couple others that I want to thread. Both barrels are .660" at the muzzle so I'll roughly have .0175 of shoulder for the suppressor to thread against. Is this enough?
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January 9, 2019, 10:12 PM | #2 |
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.0175 of shoulder for the suppressor to thread against. Is this enough?
NO. You don't mention caliber but ASSuming more than .224. I think the machinist who threaded my barrels wanted to see .650-.680 for a 1/2x28. If you wish to maintain this barrel length, have the muzzle threaded 1/2x28 and silver solder a 5/8x24 adaptor with an increased diameter base in place. |
January 9, 2019, 11:56 PM | #3 |
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Here are the SilencerCo recommended thread specs for centerfire rifle threads:
https://s3.amazonaws.com/com.silence...read_specs.PDF
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January 9, 2019, 11:57 PM | #4 |
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6mm barrels 6x45 and 6X47 Rem. That answers my question, I just will not go with a direct thread suppressor.
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January 10, 2019, 07:44 AM | #5 |
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A few silencer quick-attach muzzle devices are designed to shoulder on the muzzle, but most shoulder up against the regular thread shoulder. So you're probably going to run into the same problem with a quick-attach silencer as you would a direct-thread: They're both using your barrel's shoulder in the same way.
I know that some gunsmiths would fix your problem by machining a collar that gives the barrel a proper-diameter shoulder, but I guess that all depends on the gunsmith and also whether they charge too much to be worth it. Sometimes in these types of cases it just makes more sense to sell the whole firearm (or just the barrel if practical) and buy a new one that's better for use with a silencer. You might try posting in the gunsmithing subforum, since this is more of a gunsmithing question than a silencer question, and I'm not a gunsmith.
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January 10, 2019, 11:23 AM | #6 |
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The thread specs above are a decent reference.
But, as a general rule: You want at least 0.100" over thread diameter for the shoulder.
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January 10, 2019, 02:17 PM | #7 | |
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Quote:
I've got to get Household Six on board, and so far she likes the idea of the suppressor after shooting a friends AR15 with one attached. I'm planning on buying two to start one centerfire and to fire. I'm planning on the YHM Resonator for my multi caliber centerfire suppressor and I'm thinking the SC Switchback for my rimfire rifles and pistols. The YHM is a little heavier than I wanted but it seems to do well as a multi caliber suppressor, and I like the modular design of the Switchback especially for use with pistols.
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January 10, 2019, 02:49 PM | #8 |
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Good point, I didn’t think about that. But it still might not work depending on the size of bullet the muzzle device is designed for. For example, I’d worry about sending a bullet much larger than a 5.56 down a 1/2x28 muzzle brake designed for 5.56. Sure, you’d probably be fine with a 6mm, but you still might want to check first. I know some companies have made muzzle devices designed for .308 in a 1/2x28 thread pitch (I think AAC did, at least) but that specific issue is something I haven’t looked into for a while.
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January 10, 2019, 04:12 PM | #9 | |
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Quote:
Just to use the suppressors, I had to thread a "starter pack" of six barrels/rifles. (I pulled some barrels, dropped others off as complete rifles.) Muzzle diameter and caliber were such with two of them that I had to make the painful call to chop the barrels. It was the most difficult decision with my go-to .270, but proved to be just fine. Even with 4" of barrel missing, I lost less than 40 fps. *I had several threaded barrels on hand, but didn't want to use them. I also assembled another threaded barrel AR upper during the long wait. But it wasn't in the picture at the time the money changed hands.
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January 24, 2019, 07:45 PM | #10 |
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Well I just put an Omega and Sparrow in jail today. Got a Good enough deal on them, that made me choose them over the Resonator and Switchback.
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May 1, 2019, 08:48 PM | #11 |
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Sparrow check cashed 30 April, Omega check cashed 1 May.
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May 1, 2019, 09:56 PM | #12 |
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Progress.
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May 2, 2019, 08:50 PM | #13 |
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I hope so!
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May 2, 2019, 09:04 PM | #14 |
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Indeed. I hope it moves smoothly and quickly for you.
My next one is still stuck on the Form 3. "Awaiting ATF response..."
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