Fitted the MKE pack and housing to the POF today. Yeah, fitted.
The hole in the front of the housing only needed lowered and opened a bit to fit the POF shelf. Took less than five minutes. The kicker came when I installed the pack and test fit the unit to the receiver. The pack fit up against the tabs on the receiver opening way too tightly. It took big pressure to even consider getting the unit pressed up against the receiver tight enough to install the butt stock, forget the pin.
After careful consideration I let the old but true mantra of "always modify the cheapest part" dictate my next move. Since this is a Turk pack and there are thousands of them out there, I decided to mod the pack frame vs filing on the receiver tabs.
Using a file I put about a .020 step in the pack frame when the tabs up front meet the frame and touched up the frame where the rear tabs meet with just a skimming, probably less than .010. Test fitting the unit to the receiver saw that with very minor pressure everything fit up nice and tight and the stock went on without trouble. Sweet!
It was now that I decided to message the rear stock pin hole a little. It had been somewhat bothersome to get in and out since the tube in the receiver is crooked just a few thou. A couple of minutes with a rat tail file and some polishing and the pin slips in and out nearly as easy as on an HK receiver.
After assembling the pack with my German ejector the pistol went back together like an HK should. A couple of loaded mags accompanied me and the gun to the back yard where the gun ran perfectly. Ejection was even better than with the doctored POF pack with HK ejector and ejection was distant and very consistent.
As seemingly crude as the MKE units can be sometimes, this trigger pack, even with it's left over auto parts, is an improvement over the POF piece that my gun came with. I like it and the plastic housing is a bit more comfortable on my middle finger where the trigger guard hits than the metal housing.
The gun is about to the point where I'm ready to refinish it now that all the fuss is done. Refinish. Reload. Enjoy.