I own a PLR-16 and recently purchased a SU-22. I like the optional operating handle (Kel-Tec calls it - DYNAMIC DEFLECTING OPERATING HANDLE Standard) on my PLR-16, so I put it on my SU-22. Big mistake! The 22LR cases were being deflected back into the chamber. I quickly changed the handle back to the one that comes with the SU-22. I wonder if the pistol trigger/grip on the PLR-16 would fit the SU-22. This would make a long barrel PLR-22.