Search found 145 matches

by RPM509
Wed Aug 13, 2014 4:04 pm
Forum: Silencersmithing Forum
Topic: Stepped Cones - Benefit?
Replies: 4
Views: 853

Re: Stepped Cones - Benefit?

Appreciate it. Folow-up: assuming disruption of the gas movement can be beneficial, is there a realistic limit to this, i.e. too much can also me a bad thing?
by RPM509
Wed Aug 13, 2014 2:50 pm
Forum: Silencersmithing Forum
Topic: Stepped Cones - Benefit?
Replies: 4
Views: 853

Stepped Cones - Benefit?

Might be a question already covered, if so, sorry.
Do stepped cones offer any benefit to suppressing? For a mental exercise, they would appear to offer some benefit, if only to create additional disruption of the gases.
Thanks
by RPM509
Mon Aug 11, 2014 1:36 pm
Forum: Silencersmithing Forum
Topic: How do you end your internal tube threads?
Replies: 5
Views: 860

Re: How do you end your internal tube threads?

I think there would be benefit from ending on a shoulder, perpendicular to the bore's concenticity.
by RPM509
Wed Aug 06, 2014 12:23 pm
Forum: Silencer Talk
Topic: Nano and Abraxas Success! Finally!
Replies: 27
Views: 6260

Re: Nano and Abraxas Success! Finally!

Very interesting tests and results, following along for the ride as I currently own none of the device models used. You mentioned in the linked write-up light primer strikes attributed to the Storm Lake barrel? This confused me a bit, is it possible that the barrel in question has a deeper than norm...
by RPM509
Tue Aug 05, 2014 9:17 am
Forum: NFA Weapons
Topic: ATF has no record of my Form 1
Replies: 6
Views: 1405

Re: ATF has no record of my Form 1

On an SBR form 1 I sent in back in 11, they lost my check and then denied my F1 due to non-payment (let that sink in for a sec). Since they denied the form 1 instead of putting it in a 'hold' status, when they got around to telling me about it, too late to fix the problem and send them a new check, ...
by RPM509
Mon Jul 09, 2012 4:34 pm
Forum: Silencersmithing Forum
Topic: Does engraving on can/SBR have to be in english?
Replies: 26
Views: 2136

Re: Does engraving on can/SBR have to be in english?

It would still be fun to have a personalized QR symbol on a magwell.
by RPM509
Thu Jul 05, 2012 3:00 pm
Forum: Silencersmithing Forum
Topic: Something odd I have a question about, my can whistles
Replies: 14
Views: 1517

Re: Something odd I have a question about, my can whistles

This just goes to show, you can tune a piano and you can tuna fish, but you can't tune a can!
by RPM509
Mon Jul 02, 2012 3:52 pm
Forum: Silencer Talk
Topic: Form 4-- Why Not
Replies: 8
Views: 1129

Re: Form 4-- Why Not

I'm not saying this specifically is, but a lot of what they (ATF) do is mandated by law. You're best best is to write your Senator and Rep, and become active with NFA clubs and associations etc that lobby for change. Great idea though, lets take it a step further and have the ATF start a 'pre-approv...
by RPM509
Fri Jun 08, 2012 1:46 pm
Forum: Silencersmithing Forum
Topic: three lug mount
Replies: 24
Views: 1883

Re: three lug mount

How about a female 3-lug so you can design and mount a new-style flash hider, then hell, design a suppressor around it on a Form 1. It took longer than I thought before someone showed up with a attempt to get around the regs. The point is, intent. If you INTEND to make it a compatible mount for som...
by RPM509
Thu Jun 07, 2012 1:30 pm
Forum: Silencersmithing Forum
Topic: three lug mount
Replies: 24
Views: 1883

Re: three lug mount

How about a female 3-lug so you can design and mount a new-style flash hider, then hell, design
a suppressor around it on a Form 1.
by RPM509
Mon Jun 04, 2012 1:45 pm
Forum: Silencersmithing Forum
Topic: reapir my own F1 can
Replies: 58
Views: 3193

Re: reapir my own F1 can

I agree with the above poster in that I really don't think the ATF, in general, is going to bother with an individual doing a repair/replacement on his or her own F1 can provided the damaged parts are destroyed prior to the manufacture of the replacements. Also, who are lawyers in here? I was always...
by RPM509
Mon May 14, 2012 12:02 pm
Forum: Silencersmithing Forum
Topic: My .223 Takedown MonoCore
Replies: 112
Views: 35670

Re: My .223 Takedown MonoCore

That is an extremely sexy suppressor.

A part of me hopes you'll not cover it in a finish.
by RPM509
Wed Apr 11, 2012 2:45 pm
Forum: Silencer Talk
Topic: How Hot Can .223 / 5.56 Suppressors Get?
Replies: 29
Views: 12036

Re: How Hot Can .223 / 5.56 Suppressors Get?

Man, that Titan QD looks pretty sweet color case hardened like that...gotta wonder, won't this really mess with the metals
after a little bit, specially the lighter steels?

That last one looks like it is sagging a bit, bad photo angle or is it really damaged?
by RPM509
Tue Apr 10, 2012 12:18 pm
Forum: Silencersmithing Forum
Topic: Wet can
Replies: 8
Views: 1150

Re: Wet can

One of the guys over on arfcom in the suppressor section, vendor rep from Gemtech stated he preferred to use #2 food equipment grease as his wetting grease. Thought this was interesting enough I've been looking for a local supplier for it in smaller amounts. Not sure how links to other sides are wel...
by RPM509
Fri Apr 06, 2012 9:28 pm
Forum: Silencersmithing Forum
Topic: Aluminum .223 silencer question
Replies: 29
Views: 35361

Re: Aluminum .223 silencer question

I've never seen nor do I know someone who has had a catastrophic failure of a suppressor. I don't think it is because people use 'aluminum', I think failures would be because 'they' would use the wrong kind of aluminum or use a poor design or a combination of the two. If you put crap in, you get cra...
by RPM509
Tue Apr 03, 2012 2:10 pm
Forum: Silencersmithing Forum
Topic: NEWB NEEDS HELP ON 308 STEPED CONE CAN
Replies: 3
Views: 667

Re: NEWB NEEDS HELP ON 308 STEPED CONE CAN

I can't answer in detail all of your questions, but I can a couple. The distance between baffles. The first baffle is usually set back a larger amount from the muzzle as this one catches the most heat, burnt & unburnt powder and pressure. This is called the blast baffle. The remaining baffles don't ...
by RPM509
Tue May 24, 2011 7:11 pm
Forum: Silencersmithing Forum
Topic: Thoughts on a silent backstop
Replies: 13
Views: 1635

Re: Thoughts on a silent backstop

Are you looking to quiet the impact of the round in the trap, quite the discharge of the weapon into the trap, or both?
by RPM509
Tue May 17, 2011 9:15 pm
Forum: Silencersmithing Forum
Topic: Form 1 Cans and Machine Shops
Replies: 15
Views: 2734

Re: Form 1 Cans and Machine Shops

dammitman wrote:
boatbod wrote:A Form 1 permits you to manufacture a suppressor yourself. If you outsource it to a company with a SOT, you'd be doing a Form 4 transfer.

OK, what about if no SOT? just outsourcing to someone who has a lathe? is that legal?
No
by RPM509
Wed May 11, 2011 6:43 pm
Forum: Silencersmithing Forum
Topic: Angles?
Replies: 12
Views: 975

Re: Angles?

Looking at the whole picture, you'll need to consider how sounds reflects from, travels through, is absorbed by and resonates in different materials as well. So not only the shape of the parts and their materials but how they are attached or fitted to one another can have a profound effect on its pe...
by RPM509
Tue May 10, 2011 11:11 am
Forum: Silencersmithing Forum
Topic: Angles?
Replies: 12
Views: 975

Re: Angles?

I'm going to take a guess and say that the 60 degree angle of the cones is a compromise. Too steep and the can becomes too long (with dB being equal), too shallow and you would need more for the same sound reduction, again making the can too long. Cone-shaped baffles in and by themselves are not the...