Performance Center T/CR22 Extractor Plunger can use the factory spring if you want to upgrade it at a later time. Some interesting facts about the new Performance Center T/CR22 Extractor Plunger. The 1/2-28 threaded barrel of the T/CR22 has the shorter "Pistol Length" threads at .4 inch (10mm) long and has an "O" ring. The very first modification you will notice is to the stock. The safety is over-sized, and the automatic bolt hold-open af