Search found 750 matches

by CMV
Fri Jul 03, 2020 5:14 pm
Forum: Silencersmithing Forum
Topic: on form 1: 7.62 or 30 cal
Replies: 3
Views: 80

Re: on form 1: 7.62 or 30 cal

I just put 30 cal on mine, but doesn't really matter. If you're diamond drag engraving, 30 cal is much easier stencils to trace :)
by CMV
Fri Jul 03, 2020 5:11 pm
Forum: Silencersmithing Forum
Topic: What would cause inaccuracy when hot?
Replies: 4
Views: 84

Re: What would cause inaccuracy when hot?

147gr ACME flat point bullets. They're coated cast. I can remove suppressor and immediately go back to good groups, so I think issue is in the can. Just weird. And can only tell it at 50 yds. Not bad enough to miss steel targets at 10-12 yds, smallest is 6" though so would take a lot to miss at that...
by CMV
Thu Jul 02, 2020 8:58 am
Forum: Silencersmithing Forum
Topic: What would cause inaccuracy when hot?
Replies: 4
Views: 84

What would cause inaccuracy when hot?

My 9mm is Ti tube & endcaps, 7075 K's. I *thought* it has been good to go all this time....nice sound & just fine running on a Beretta 92 at typical pistol distances ....~10 yds. Got a CZ scorpion & it sounds great there too. But now I'm shooting at 50 yds & notice after about 10 shots my accy goes ...
by CMV
Thu Jun 25, 2020 10:55 am
Forum: Silencer Talk
Topic: Teflon tape
Replies: 3
Views: 167

Re: Teflon tape

Never tried but remember reading in the past it made a mess. Have you tried anti-seize on the barrel threads? I end up with issue that tightening down a direct thread suppressor, the encap wants to stick to the barrel threads more than the tube & instead of removing suppressor, it wants to disassemb...
by CMV
Wed Jun 24, 2020 2:46 pm
Forum: NFA Weapons
Topic: ATF Form 5320.20 question
Replies: 2
Views: 54

ATF Form 5320.20 question

I'm in NC and visit family in PA, friends in TN. If i want to take an SBR and/or suppressors to either, I'm supposed to submit the 5320.20 or only if I'm permanently moving those items there? If it is required/good practice to do that for a visit, do i need to wait for an approved form back or just ...
by CMV
Wed Jun 24, 2020 11:41 am
Forum: Silencersmithing Forum
Topic: Welding endcaps
Replies: 9
Views: 253

Re: Welding endcaps

Hmmmmm....seemed like a good idea. I have 1020 tube & 4130 chromemoly round stock in the same sizes so could I stick those with something like a 3/32 6011? Or is it just the wrong process no matter what for thin walled tube? I don't really care about pretty and being a novice don't expect pretty. Ju...
by CMV
Tue Jun 23, 2020 2:51 pm
Forum: Silencersmithing Forum
Topic: end cap strike, 9mm threaded can
Replies: 9
Views: 282

Re: end cap strike, 9mm threaded can

You'd know that indicating it in 4-jaw. Gets down to almost no runout, move dial indicator back on piece a few inches and now there's runout. If no matter what there's runout when measuring a few inches apart your stock is out of round. If you have the needle type dial indicator vs the plunger type ...
by CMV
Tue Jun 23, 2020 9:07 am
Forum: Silencersmithing Forum
Topic: end cap strike, 9mm threaded can
Replies: 9
Views: 282

Re: end cap strike, 9mm threaded can

I'd still find where the issue is. .060" is a safety margin, not min clearance to work. Even if baffles have same bore size and bullet clears everything, being so far off center thru the suppressor bore is likely to play hell with accy. Again....ask me how I know..... :) Maybe not every single insta...
by CMV
Mon Jun 22, 2020 8:03 pm
Forum: Silencersmithing Forum
Topic: Drilling K cups and cones
Replies: 6
Views: 586

Re: Drilling K cups and cones

https://makezine.com/projects/skill-builder-finding-the-center/ You can do this to find center on each one. Mark it, then use a spring loaded center punch to put a dimple dead nuts in the center. Then clamp your cone down to the table (will need a fixture) and use a a tiny (like 1/8" body diameter) ...
by CMV
Mon Jun 22, 2020 7:43 pm
Forum: Silencersmithing Forum
Topic: First Form 1 Build 6.5 CM
Replies: 4
Views: 305

Re: First Form 1 Build 6.5 CM

I'd do a P or 21/64 size. .060" over. That's just me, some would go tighter. There is very little gain going as tight as possible on bore size all else equal and 6.5CM is still going to be loud. I've never seen published subsonic load data for it but if you were planning to work down a light trailbo...
by CMV
Mon Jun 22, 2020 7:34 pm
Forum: Silencersmithing Forum
Topic: Form 1 Maker when is it officially made?
Replies: 10
Views: 317

Re: Form 1 Maker when is it officially made?

.....What happens if I buy an extra part to verify my limit machining skills.... You're buying parts or you're machining parts? Regardless, if you tear something up while making, scrap that piece and carry on. You complete the whole thing and decide it doesn't perform like you think it should, you ...
by CMV
Mon Jun 22, 2020 7:24 pm
Forum: Silencersmithing Forum
Topic: Serial number on silencer
Replies: 15
Views: 393

Re: Serial number on silencer

You said in a previous thread you're making a .308WIN can & using 17-4 internals. Aluminum of any sort should be 0% of that build. Any suitable material for your tube will not be marked with punch & hammer lettering. Recommend you find a shop local & have them do it. Even a trophy shop probably can....
by CMV
Mon Jun 22, 2020 5:47 pm
Forum: Silencersmithing Forum
Topic: Welding endcaps
Replies: 9
Views: 253

Welding endcaps

Have access to a smallish stick welder - a 120amp that runs off 110V plug. Have a can I'd like to weld with it. Since I know about nothing, have 2 big questions for now. #1 1/8" or 3/32" 319L rod is what I think I should use. Endcap is 416 & tube is 316L stainless. #2 I'm not sure exactly how the we...
by CMV
Mon Jun 22, 2020 5:39 pm
Forum: Silencersmithing Forum
Topic: end cap strike, 9mm threaded can
Replies: 9
Views: 282

Re: end cap strike, 9mm threaded can

an 11/32" aircraft extension drill will give you a close approximation w/o buying drill rod. snip... I have a Griffen style taper mount I made from 17-4 for the brake mount. I made the endcaps and threaded the tube myself. You did all these with your 4 jaw chuck and indicated the work every time? Al...
by CMV
Mon May 04, 2020 6:13 pm
Forum: Silencersmithing Forum
Topic: Back at it, new .223
Replies: 3
Views: 287

Re: Back at it, new .223

Interesting. More & closer than 5/8? Like 10 @ 1/2"?

Pat, hope you're doing well! I think I still have a tool I need to return to you....a couple years late :shock:
by CMV
Mon May 04, 2020 4:25 pm
Forum: Silencersmithing Forum
Topic: Back at it, new .223
Replies: 3
Views: 287

Back at it, new .223

Hi all, been a while! :) Doing another .223 can & would like some input. Plan is 1.625" OD, 0.065" wall, 1.495" ID 316 seamless tube, 7" OAL. 60° cones of 416, 0.060" thick Spacers 304 welded tube, 1.500" OD, 0.065" wall turned down to 1.490" OD leaving 0.060" wall Direct thread 1/2-28 0.281" bore (...
by CMV
Mon Jan 29, 2018 8:35 pm
Forum: Silencersmithing Forum
Topic: 300 blackout suppressor help
Replies: 11
Views: 3032

Re: 300 blackout suppressor help

Feel free to copy what you want from mine: http://www.silencertalk.com/forum/viewtopic.php?f=10&t=136120 Video in that thread somewhere comparing to a commercial can. It is very good on 300BLK for as simple as it is. My sub load data. Both are very accurate and cycle carbine gas AR all day long supp...
by CMV
Tue Sep 05, 2017 6:48 pm
Forum: Silencersmithing Forum
Topic: Baffle to tube clearance
Replies: 7
Views: 2694

Re: Baffle to tube clearance

I read here over and over .005" clearance. And that's what I did for my first several. And they are a bear to get the guts out after just a moderate amount of shooting. (all might be that way...I have no idea since I only own my form1 stuff and not commercial suppressors). So on one build I decided ...
by CMV
Tue Sep 05, 2017 6:35 pm
Forum: Silencersmithing Forum
Topic: First form-1. How much clearance for .22lr ?
Replies: 12
Views: 6365

Re: First form-1. How much clearance for .22lr ?

I use 17/64", but am not drilling freeze plugs with a cordless drill. So depending on how uniform the FPs are, how well they fit the tube, how precisely you can measure center, how accurately you can drill center, etc should increase your fudge factor from that min diameter. I had accuracy issues wi...
by CMV
Fri Jul 07, 2017 9:37 am
Forum: Silencersmithing Forum
Topic: Machining cerakoted parts
Replies: 8
Views: 1437

Re: Machining cerakoted parts

For cerakote, what you are describing will work fine. I cerakote, then engrave often to make the engraving standout or be blackened for a neat look. The issue you will have is creating bad wear areas. While I really like cerakote my one major gripe with it - or a lot of finishes - is that it wears p...
by CMV
Tue Apr 18, 2017 6:27 pm
Forum: Silencersmithing Forum
Topic: Threading Problem
Replies: 11
Views: 1383

Re: Threading Problem

I get that too. If I watch when the threading tool engages I can see the toolpost rock back a little. I don't get that with any other operation - or at least to a degree where it affects dimensions along the part. Only threading. To 'fix' it, my QCTP handle is to the left when tool is locked in - at...
by CMV
Thu Apr 13, 2017 7:19 pm
Forum: Silencersmithing Forum
Topic: 300 Blk suppressor--Design turned into 5.56 can
Replies: 29
Views: 6525

Re: 300 Blk suppressor

http://imageshack.com/a/img924/1687/CNvLKG.jpg So rifle build went a different direction. this will be primarily a 5.56 can that will sometimes see a 308 and eventually ill build a blackout upper. Made some changes to the design im also thinking ill weld the back suppressor cap and have the front o...
by CMV
Wed Apr 12, 2017 8:10 pm
Forum: Silencersmithing Forum
Topic: 300 Blk suppressor--Design turned into 5.56 can
Replies: 29
Views: 6525

Re: 300 Blk suppressor

Cmv, his spacing, clipping, and porting all seem to resemble the Sig silencers. Are they poor performers on 300Blk hosts? Clips should be aligned and baffles need more ports, but I agree; it resembles the Sig srd762ti No idea since I've never had one. I do know that for 1.5" OD, 8" OAL that looks l...
by CMV
Wed Apr 12, 2017 8:03 pm
Forum: Silencersmithing Forum
Topic: 30 cal can - all you need to make one
Replies: 46
Views: 43035

Re: 30 cal can - all you need to make one

What did you knurl the endcaps with? That pattern looks interesting. I have tools that do straight ridges or diamond pattern but haven't seen the dots. Hold off clipping the cones. You might find that you're perfectly pleased with its performance w/o clipping. You can always go back and do that late...
by CMV
Tue Apr 11, 2017 8:44 pm
Forum: Silencersmithing Forum
Topic: 300 Blk suppressor--Design turned into 5.56 can
Replies: 29
Views: 6525

Re: 300 Blk suppressor

What is baffle spacing? Those look WAY too close together for 30 cal. .600 - .700 neighborhood is a good place to be. .625 - .650 is good distance if 300BLK subs are your primary application. Why the tiny port in side of cone? Is that all cones or just first? Regardless, I don't think you want that ...