Note:
CSP-P3 was a weapon developed by Site: Blackout in case of an emergency, there was only ever one made as they were extremely powerful and dangerous.
CSP-P3 looked like a Micro HID but with a longer barrel, this weapon would send any SCP it touched into an alternate dimension developed by the Foundation,
Made to contain extremely dangerous SCP subjects it was experimental and dangerous to put anything in that dimension, so it was not followed through with.
The dimension was could hold a maximum of 14 SCP subjects, any more than 14 and the dimension would corrupt morphing all SCP's into one god-like SCP.
The dimension was used as a temporary holding cell for some SCP subjects.