Titanium 22LR K-Baffle Build

[trevor1058]

Hi guys, long time lurker here. Finally have time to start machine work on my first form 1 build. All 6al-4v titanium including tube, machined from bar stock. Weight is around 5 oz. 6.075 long. Tell me what ya'll think, look good?

[noscoe30]

It looks like you could stuff the last baffle inside the end cap and make the whole tube shorter.

[Enfield577]

I have made many 22 cans like that over the years and found that I have best results with the blast chamber spacer between 1/2" and 5/8"

Saying that my baffles don't have Tirant (I think???) additional scoops in the rear face, so no sure what difference that would make

Cheers

[T-Rex]

I wouldn't put the last K in the endcap, simply because you would need another design. Just shorten the end cap to 0.2", get rid oof the shoulder and make the OD all threads. Youll lose about 0.3", or so. Personally, I have great experience with a muzzle to blast baffle distance of .125". I have yet to meet any frp with this dimension.

Also, you need to modify your K design a bit. The central bore needs to be a bit longer. While one would think this goes against concept, you need to improve your scoop and vent. By making the bore longer, you can have a deeper facial scoop. Also, the vent cut will be more pronounced and overlap the scoop to work as intended. This change will yield a, marginally, longer baffle. I think you be great with only 7

[ghostdog662]

I second the 1/2" blast chamber on a .22 build with that many baffles. I think you should drop it down to 7 baffles and dump that spacer at the end.

[Historian]

Hi guys, long time lurker here. Finally have time to start machine work on my first form 1 build. All 6al-4v titanium including tube, machined from bar stock. Weight is around 5 oz. 6.075 long. Tell me what ya'll think, look good?

I am not ashamed to express my envy at your talent, machining skills, and result.

Thank you for allowing me through your presentation to experience
for a passing moment the delusion that I might
someday be able to attain that level of machining skill.

No matter how far a guy succeeds in his own field
the admiration that started so long ago never diminishes
for those master hands-on productive machinists
who actually turn(ed) out real things.
Best.

[trevor1058]

ok, here is the new baffle design. also will make blast spacer .375 instead of .250 and shorten endcap/remove shoulder and drop one baffle. looking better? thanks guys

[T-Rex]

Looks much better, couple things:

Use a larger bit for the frontal scoop. I usually go equal to bore dia.

The vent hole does not need to be that large. Not the bit size, but the penetration dimension. You want the gas to vent to the outer chamber, but not easily return. Just bring the bit towards the centerline, a bit more. It is easier to remove a bit of material, if needed, than add.

What are your wall thicknesses? Hard to tell from pic, w/ Ti you should be fine around 0.04". All depends on your level of precision.

On the precision note, I'd enlarge the bore a tad, unless your machine is dead on. I go for 17/64 w/ 22cal.

Be careful with those semi-circular grooves, in the face. They are patented by AAC. If you dare to cut them, do so at your own risk.


Lets see a final rendering

[trevor1058]

Ok, increased front scoop to .250 wide and decreased vent hole size. Tube wall is .050 and baffle thickness is .040. will probably go with .260 bore. I have some micro boring bars so it will be concentric. OAL in model is 6.125 with a weight of 4.96 oz.

Should start machining tomorrow morning, I'll be sure to post more pics.

[trevor1058]

Every thing done except tube. Also decided to drop the 2 smaller face grooves.

[T-Rex]

Looking good.
I know its Ti, but you can trim some fat from the end caps, if you wish. Especially the front.

[LavaRed]

Those endcaps are way too long. At most, 3/16 of threaded engagement surface suffices. That's almost a whole inch you can lose from the can, or increase your baffle count. Also, I would suggest modifying the front endcap to have a cone shape or at least a scoop. It will dramatically boost performance.

[trevor1058]

I have been thinking about shortening the end caps, still need to make tube. What do you mean about modifying the front end cap?

[LavaRed]

I have been thinking about shortening the end caps, still need to make tube. What do you mean about modifying the front end cap?

After shortening it to 1/4" total length, don't make it hollow. Make it solid, then cut a scoop all around. Instant half baffle.