My 50bmg suppressor journey

[Milan454]

Hello all. Recently I completely a form 1 can for my 300blk pistol. I am super satisfied with how well the can works. It was simple 1-7/8" 4130 tubing and stainless washers from the hardware store pressed into come shapes. My tools are very basic compared to many. I have no lathe at my disposal however and that will govern this build.
I have collected 2.5" stainless freeze plugs for my baffles and I will need to source some 4130 tube. Aside from a muzzle brake I'm at a loss for the barrel interface as far as threads go.
Thought and suggestions are welcome!
TIA
Milan

[Zero99z]

Onlinemetals.com is where I get most of my raw stock. They have decently priced 4130.

[Milan454]

I picked up some materials;
- 3' of 3" .125 wall 4130 tube with a 2.76" id.
- 2' of 2.75" OD .250 wall of 4130 to fabricate spacers.
- 2.5" stainless freeze plugs. For baffles.
- 2.5" stainless washers, for baffles.
- 1" -14 stainless flanges nut, for barrel adapter.

I plan to make a 17.5" x 3" suppressor . I will alternate flat and cupped baffles. I'm not sure how many baffles yet. The spacers will be build from the 2.75" tube that I will skeletons and weld to the baffles, essentially creating an inner core to be inserted into the 3" tube. I purchased enough material to make a second can down the road.

[Zero99z]

I'm doing a hybrid coaxial can using 1.80 dia freeze plugs.

http://imgur.com/a/smOEqEh

I'm still working on the spacing, and I may need to make custom washers, but I have decided if I'll use any yet.

[Milan454]

I'm still waiting on the 2.75, .25 tube. I have been pondering how to keep weight down as the .250 tube will be heavy. I will likely just us it for the blast chamber and for bushings to weld the washers and freeze plugs directly to the 3" outer tube. I will try and assemble a few sketches over the weekend .

[Zero99z]

I'm still waiting on the 2.75, .25 tube. I have been pondering how to keep weight down as the .250 tube will be heavy. I will likely just us it for the blast chamber and for bushings to weld the washers and freeze plugs directly to the 3" outer tube. I will try and assemble a few sketches over the weekend .

I'm using that 3" od x 2.76 id tube for my expansion chamber. 12 inches isn't terribly heavy. .25 wall will be too heavy.

[ECCO Machine]

That thing is gonna weigh about 20 pounds using so much heavy wall carbon steel tube.

If I were making it, I would go tubeless using 2.5" 17-4 H900 with .100" WT in the blast chamber and .065" from there forward.

[Zero99z]

That thing is gonna weigh about 20 pounds using so much heavy wall carbon steel tube.

If I were making it, I would go tubeless using 2.5" 17-4 H900 with .100" WT in the blast chamber and .065" from there forward.

Barrett's qdl is made from 4130, and not all of us have machining equipment. Personally, I want the extra weight to soak up recoil, but it's not likely it'll weight more than 8 lbs. My rifle is fairly light, being under 30 lbs fully loaded with optics and loaded mag.

[Milan454]

In hindsight I will not need to use the .25 tube for anything but "shim rings" for the baffles. Otherwise it will add too much unnecessary weight. I believe the 16" 3" can with baffles should come in at 6 pounds or so...

[Milan454]

Is there a range of number of baffles and spacing to shoot for? TIA