I had done a couple freeze plug suppressors in the past and after buying a 8x16" grizzly and putting a couple dozen hours tinkering on it and ruining expensive bar stock I was ready to cut out some K baffles.
The Ti tube and caps are premade solvent trap parts that I modified by turning down the OD on the front portion to get rid of the dimples on the front cap, I guess I like the stepped look, too.
The Ks are cut from 303 SS, pretty forgiving material for a novice. Cuts like butter with the right tool and held firmly in a mini lathe. I had to get a proper live center featuring bearings, because the one it came with was a plain hardened steel one. I bought a beefy 2" spinny live center for like $20 on amazon and that probably improved this lathe more than the hundreds I've spent on other tooling.
The tube ID is 1.355" x 7.6", the bores are drilled with a 13/32" bit and then cleaned up with a tiny round file.
I used a 3/8" ball mill for the vents and mouse holes. No dater hole, though I would be willing to add it if it actually works to decrease backpressure. Was getting spit on pretty good running cheap 147gn through my 92 Centurion.
The blast chamber is as large as it is to accommodate a muzzle brake with acme threads. The rear cap is threaded to fit multimount and liberty devices, so it's pretty versitile. I have a 3 lug, a booster and a brake mount.
It performs pretty well, but I think it should do better. Should I touch up the vents/mouse holes with a bigger ball mill? Add little holes to the bottoms of the skirts opposite the vents?
Here's some pics.
Built a K into the front cap
ETA: the Ks have a cone and wall thickness of 0.05" +/- a few thousands, the faces are thicker. It weighs 16.18oz without the mounts so it's pretty beefy.
