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Posted: 12/30/2013 5:32:46 PM EDT
Still have some more work to do. The tube is long now...it will get trimmed to 3" OAL...1" diameter will be reduced to save a little weight... Bore diameter is 0.280". It's meant to be used with an ablative and the endcap will utilize a wipe design if I choose to do so. Will find its final home on a Beretta 21a. Baffles still need a Dater hole and ports. Enjoy!
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I'm always jealous of people that know how to use a lathe. Nice work. Can't wait to see it done! I have about 10 hours on a lathe...hardly know how to use it to its full potential...but I know enough to keep all concentric and the basics of suppressor design. |
More progress. The dimples on the endcap will be gone after I turn it to about 1/2 its current width. They're just for ease of removal after life fire testing. I'll likely mill a slot or make a spanner wrench hole. The baffles all have a .280" bore and the endcap has a .320" bore to allow for some yaw as the bullet passes through the wipe. I altered the endcap design from what I had originally intended. It will still allow for the use of wipes, but requires endcap removal to replace. I want to get an idea of how it will sound wet and wiped before I go about spending 2-3 hours building the part. That's also the reason for the aluminum endcap. Once I get it tuned in I'll go to a stainless endcap. The rear endcap, which will be threaded for the muzzle, IS going to be stainless. Once I hear how it sounds I'll go ahead and mill the ablative port and thread the ring which will cover the port. Progress is slow but progress is progress.... Enjoy!
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Quoted: End cap??? Quoted: Quoted: What are the internal threads for in the last picture? If you're looking to smooth out the finish of the exterior of your tube, try running a super slow auto-feed and use coolant mister if you have one. End cap??? I figured that's what the external threads were for.
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I figured that's what the external threads were for. Quoted:
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What are the internal threads for in the last picture? If you're looking to smooth out the finish of the exterior of your tube, try running a super slow auto-feed and use coolant mister if you have one. End cap??? I figured that's what the external threads were for. The muzzle end is threaded internally and externally. Rear end cap is threaded internal. The external threads are for a collar that will be worn on the outside of the can which can be opened to expose a port into the blast chamber in order to add an ablative...more than likely water...possibly gel depending on the host. On a Beretta 21A it's easy enough to tip the barrel forward to ensure a clear bore path. On a Ruger MK II/III, water will likely be the best choice. Ultimately it's designed to be shot wet because of its small volume/size, so why not be able to add an ablative without taking the can off of the host. It's really just a novelty and an idea that's going from idea to reality. I don't see why it won't work. Wouldn't try it on a centerfire pistol can, but on a .22 can why not. Worst case scenario we'll pull the baffles and use them for a full size can and ditch the tube on the micro can. Dave, No coolant mister. The finish shown was done at something like 104tpi (slowest on the lathe IIRC) at 270 rpm with a finishing tool and no coolant. Just building a functional can at this point and will work on something a little "prettier" if it actually work.....but I appreciate the tip. I'm an amateur on the lathe... |
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I like it. I saw the thread over on ST.
I made a micro can..well, a small one anyhow 1"x4"... for .22 out of titanium and stainless, but my baffle design was different. Looked more like the Spectre 2 baffles. It supressed better than I thought it would have. Loud FRP, but a little rearranging of the spacing took care of that. Overall, I wasn't really happy with it, so I never showed it publicly, but seems lots of people have a real interest in yours. I just figured for 2-3 more inches, I got a tremendous reduction in sound, so I make all my .22 cans minimum 6" now. I've got a 22 can coming up soon, Titanium will be here Wed, that will be an all titanium rimfire can. There are a few, but not many. I'm stoked about it. |
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I like it. I saw the thread over on ST. I made a micro can..well, a small one anyhow 1"x4"... for .22 out of titanium and stainless, but my baffle design was different. Looked more like the Spectre 2 baffles. It supressed better than I thought it would have. Loud FRP, but a little rearranging of the spacing took care of that. Overall, I wasn't really happy with it, so I never showed it publicly, but seems lots of people have a real interest in yours. I just figured for 2-3 more inches, I got a tremendous reduction in sound, so I make all my .22 cans minimum 6" now. I've got a 22 can coming up soon, Titanium will be here Wed, that will be an all titanium rimfire can. There are a few, but not many. I'm stoked about it. Nice! Like I said on ST...there's likely a reason there are no cans this size out there. I expect one of two outcomes. Either 1...it will be loud regardless of the use of wipes and an ablative...or 2...it will work. The point is to have a very small and light can for pistol use that's handy and practical...and for good sound performance when shot dry with sub s out of a rifle. Ill know once the rest of the tooling gets here and I make the ablative port cover/collar. Ill drop it on a postal scale when its finished. It weighs about 6 oz right now. I have two other baffle designs to try if K's aren't quiet enough...including a monocore if I can master milling on a lathe in a day or two... 
I'm interested in seeing your TI can build. Ill keep an eye out for it on ST! |
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Got it together today...VERY pleased with how it sounds on a rifle. Dare I say little discernible difference from my pilot and sparrow out in the open, which are quite a bit larger. It's louder than I want on the pistol...but haven't shot it wet or wiped yet so we'll see...
Video on both the rifle and pistol: http://s2.photobucket.com/user/cms81586/media/VID-20140107-00007_zpsa6086d6a.mp4.html 
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It would probably be a better candidate for a .250 bore. Quoted:
It would probably be a better candidate for a .250 bore. I'm still going to try shooting it wiped and wet, but I agree. I'll go with a slightly tighter bore next time around. I'll probably ditch the wipe endcap, which will save me a little room and possibly allow for the addition of a 5th baffle. I'll be able to get the endcap a little tighter as well. Trial and error at this point. Once I'm happy with it I'll turn one in all stainless. and likely tig weld it up that "should" save me some weight in materials on the front endcap and just dip it once it gets nasty. Quoted:
Looks and sounds good. I will have to view the video again when at home and have better speakers. MAHA Video doesn't give a very accurate representation of actual suppression levels....but on the CZ in person...it is about as loud as operating the bolt. On the Ruger pistol....that's another story. It's pretty loud. Not enough to bother the ears in the open and quieter than a sonic crack, but it still sounds like a gunshot and it's slightly uncomfortable when shot inside the garage. |
Shot it today with wipes. Wiped and wet (with wire pulling gel) , it was very comparable to my AAC Pilot. Not great but acceptable. I did experience some bullet destabilization with the rubber gasket wipe (2 out of 15 shots). I'm going to try a few other materials including vinyl to see if it will punch through the wipe cleaner. Here's an accuracy comparison. About the same except for the one flier that gave an oblong bullet hole (top left hole on the left target). Not bad for 15yds out of a Ruger MK III. I'll try shooting it wiped out of the rifle to see how it does, but honestly it's quiet enough on the rifle that it's not necessary. I grabbed a box of 50 that I had apparently shot 1/2 of already, so I shot 15 wiped and 10 more without, informally offhand.
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