No worries, guys. Let me give these valves a try with NPT fittings. If I blow myself apart, I'll make sure someone distributes these for me.

...If you're willing to pay shipping. These things are about 4lb each.

After some shaping: http://i237.photobucket.com/albums/ff155/PointBlank017/sword.jpg I just wanted to add: I thought all you guys were crazy for making your own knives when there are so many good ones already for sale... well after 5 seconds behind the grinder, I'm hooked. What an awesome hobby.

Well here it is: http://i237.photobucket.com/albums/ff155/PointBlank017/2012-11-05_14-01-51_133.jpg It's essentially your usual spring-piston mechanism with a twist: There is a break in the barrel for a system that delivers a pre-measured amount of salt into the path of airflow simultaneous with fir...

Ontario 22" Heavy Duty Machete http://i237.photobucket.com/albums/ff155/PointBlank017/ontario.jpg This is one of those little gems of the knife world... It's basically a heat treated 1095 full tang blade for <$25. The handles suck, the factory edge sucks, but it's a sweet chunk of metal for a low pr...

Well here they are: http://i237.photobucket.com/albums/ff155/PointBlank017/QEV.jpg Undoubtedly BSPP threads, not NPT. But, NPT male threads into them no problem. In fact since it's a straight thread, the additional insertable depth almost makes it seem more secure than the typical NPT-NPT connection...

Mr.Sandman wrote:How does k560 stack up against something like 52100? Bohler makes some top notch steel, i just picked up a spyderco paramilitary 2 in m390.

Nice knife. I've been looking at the Para 2 but the tip seems too fragile for a hard use folder. What are your impressions?

Much appreciated, Dewey. While I'm at it I'll pick up a cheapo belt sander for my knife sharpening needs.

Thanks for the pictures, Dewey! I do have a 3/4" NPT tap but I'll need to find a 59/64" drill bit.

I'm concerned about making a centered hole using my whacky drill press. Would you advise drilling from the hollow end, or drilling from the closed end using progressively larger bits?

I'd rather thread two bolts through the wall of a cartridge and have an electronic ignition source make contact with them externally. Primers would create sealing issues and not to mention your chamber will be filthy in no time.

bump re-purposed thread

Fnord wrote: We need to start reverse-engineering the tippman C3.

I've been fiddling with combustion repeaters for a year and a half.

Just never bothered to post I guess...

Is this gun connected to a constant air source? If so, the MJVO-3 has been proven at those pressures. A slide valve is always good too. If you have a "fill here and shoot over there" setup then you can use a pistol-grip blowgun for that trigger feel. What size QEV is this? A good modded blowgun can ...

As the title says, I need to connect something with male 3/4" NPT threads to something that has female 1" G threads. A direct adapter does not exist (afaik), so what other options exist that would minimize dead space? Tapping a 1" G plug maybe? Or will a male 1" G to female 1" NPT adapter plus a red...

Awesome one, Joerg!

New to combustions: what is the optical location of a spark gap? Close to the barrel or away from it?