Taking inspiration from PVC Arsenal's suggestion of using a spring plunger, I decided to build something similar that still pertained to the "hardware store parts" idea of a SNAP. The spring plungers are not only very expensive, but must be ordered from McMaster.
Here is what I did:
I used the following parts plus a few more:
-1x 1/8" Brass Nipple
-4x 4-40 Set Screws (only 2 are pictured)
-2x Nylon Spacers (I'll edit in the exact size later)
-1x 1.5" 4-40 screw
-1x Small Spring
-1x 4-40 Nut
These 4-40 set screws were either the smallest or second smallest set screws I could find at Ace. Be careful, it's VERY easy to lose them.
To start off with, insert one of the nylon spacers into the end of the nipple. Make sure the end of the nipple and the end of the spacer are flush. Drill a hole (with an according bit for 4-40 screws) in the side of the nipple (about 1/8" down from the end of the nipple). Drill all the way through the nipple/spacer so that there is a hole going all the way through and exits the other side. Tap the holes with a 4-40 tapping bit.
Rinse and repeat for the other end of the nipple.
The nut I got (and I assume all other standard 4-40 nuts) didn't fit inside the nipple. I carefully dremeled it into a smoother shape so that it would slide inside of the nipple.
Put one of the nylon spacers in the nipple and run the set screws in from both sides. Next, make an assembly like so:
Insert the assembly into the nipple and insert the 4-40 set screws through the nipple and into the spacer, again.
The final product should look something like this:
I'm really happy with how this turned out. It's very adjustable and modifiable. SNAP triggers often take a lot of tweaking to get optimum performance, and this is perfect for that application. You can adjust how far the screw protrudes from either end by turning it in either direction. The nipple itself can be adjusted in the same manner to change how far it protrudes into the plunger tube. I have yet to install this into a SNAP, but I'm hoping to build a complete SNAP within the next few days to test it. I plan on grinding the end of the long screw, yes. As far as an actual trigger goes, I have some ideas, but they really need to be tested. I can post a video of assembly and basic demonstration of this if necessary, but it's fairly self explanatory.
Edited by venom213, 02 September 2010 - 02:20 PM.