I recorded this quick video showing the stuck feedneck in a PGI FROG a few weeks back. In the video I wedge a rubber screwdriver in the stuck feedneck to remove it.
PGI FROG with stuck feedneck – feedneck removal tool
Here are several photos of an ACI Sports or PGI bottomline regulator broken down. This regulator came off a PGI FROG.
The Sonic kit turns an ACI Griffin semi automatic into an electronic pneumatic. This kit was likely built with Leon Styles of PGI and was sold around 2001.
Ed "Smiley" Beale's modification for replacing the stock Piercing pin on a Nelson nelspot 007.