SpudFiles

**EDIT** I have assembled the rifle's internals and given it a bolt action system.
Planning on building an airsoft sniper using this qev/ pilot combo:





And I noticed that they were both PT. I live in america where we have NPT threads, is there an easy way to switch from one to another (e.g. some form of adapter)?

Assuming it's not just a typo, you're probably be better off looking around for something in NPT - 1/4" QEVs are sold in a thousand and one different places, but adaptors are just going to add more work, cost, bulk and joins (increasing the risk of a leak).

Thanks. I didn't get a npt qev because I can't find a npt slide valve to pilot it. Any ideas?

Nevermind, found one.

Well, two weeks later and most of my parts have arrived. 1/4 inch QEV and slide valve, .25 gram bb's, rifle scope and rails, etc. Just waiting for my 65-round magazine to come. Some pictures of the internals while drying:
Some test shots at 80 PSI and it will send a bb through 3 layers of cardboard at close range. Don't have a chronograph, but I'm assuming above 400 FPS? An idea I had was to make a board with marks for each inch, and record the bb flying with my 240 frames per second camera.

It's looking good!

I see you've gone for the commercially available breech, interesting!

An idea I had was to make a board with marks for each inch, and record the bb flying with my 240 frames per second camera.

240 fps is not really enough for meaningful data.

Yep, I've gone for the commercial breech. I figure that the more off the shelf, standardized parts I used, the easier it will be to build and repair. It was pretty interesting to attach to the pipe nipple; I had to solder a brass pipe to the inside of the iron nipple, then "crown" the other end to fit it over the breech. And of course, it wouldn't be complete without a good lather of epoxy

1nxtmonster wrote:And of course, it wouldn't be complete without a good lather of epoxy

As is written in the Holy Book, go forth and mix part A and part B!

Well, I've seen to have screwed up even the simplest tax of mixing epoxy. It is that two part putty stuff, It has been curing for 48 hours and it is still tacky. It should have been cured in 24 hours. Any thoughts?

1) did you mix it well enough, and in the right proportion as recommended by the manufacturer?

2) Is it curing somewhere very cold?

1) Yes I mixed it well enough, and give or take the right proportions. Maybe a little to much of the grey stuff.

2) About 60 degrees farenheight.

I figured I must have mixed the epoxy wrong, because 72 hours and it's still soft. So I peeled it all of, sanded up the surfaces, and mixed up a proper batch. It's now curing (again)

Epoxy 101: Follow JSR's advice!

jackssmirkingrevenge wrote:1) did you mix it well enough, and in the right proportion as recommended by the manufacturer?

2) Is it curing somewhere very cold?

jrrdw wrote:Epoxy 101: Follow JSR's advice!

jackssmirkingrevenge wrote:1) did you mix it well enough, and in the right proportion as recommended by the manufacturer?

2) Is it curing somewhere very cold?

I thought epoxy cures faster in warm weather