In my cleaning, I found a longshot that I had intended to sodizzle. So I up and started in again and this time, was determined to make use of this Pak D clip. I won't go into detail about creating the sodizzle breach, but will explain what I've done specifically for this version. Please view some videos or a write-up to get more details on a sodizzle breach:
My sodizzle write-up
Sodizzle's video on his breach
Bolt
The bolt is really the tricky part. Once I got this measurement down, I adjusted the barrel to work with this length. This is really the part that you want to get working correctly before you determine the placement of your barrel. It has the usual 45 degree angle and is coned out to help with feeding. The lip of the bolt to the front of the plunger tube is 4.5" and probably another .5" that is embedded into the base of the bolt that is inside the plunger tube.
The bolt length may or may not affect the spring(s) that you are able to use as well. In my tinkering, I didn't have the plunger rod + spring when testing the length. When it was all assembled, I found the travel was off because of the spring, so keep that in mind if you are trying this out that you may have to tinker with this measurement based on your spring set up.
I am currently using a length of k18 spring.
Barrel
For the barrel I used a 10" length of CPVC. I wasn't able to easily use the stock dart tooth as a ramp in this version because the barrel had to be moved further back. I used Maverick AR's as spacers to get the correct placement of the coupler and used a cut down version of the stock dart tooth (ramp) to help feed darts. The ramp is glued directly to the coupler. In order to have the barrel not move backwards, a spacer will be used at the front part of the barrel. Here I am using a length of 2k pump that will be glued in place. I had to completing afix the barrel in place, so I am thinking of using another method so that the barrel can be removed if needed.
The seal of this is okay. It's not completely air tight around the coupler, but it's pretty close. I pondered attaching an o-ring within the coupler, but decided against it. Overall, this mod was to be able to work with the different clip, but I believe it will be able to work with both types of clips now. And apparently, I threw out the plunger head, so it's working with a make shift one at the moment. The seal is good, but hopefully I can find a stock replacement one soon.
Expanded and completed views
Close up of barrel and bolt
Close up of the front barrel
This is definitely not the cleanest mod, but I believe it works well and this time I had a better sense of what I needed to accomplish.
