So I recently acquired an old Sheridan with the janky push button safety you have to hold while firing and it’s got a weird problem going on. So the rifle pumps and holds air all day and the trigger system works flawlessly; however, when I fire the gun the air escapes out of the breech/bolt area. It’s missing the little cam plate cover but I wasn’t sure if that was the only thing causing it. It seems like there’s more to it than that but so far I’ve only worked on old crosman and Benjamin pistols so this model is completely new to me. I attached a photo and video, it’s hard to tell what it’s doing in the video but ALL the air is escaping out of the breech. Any help would be greatly appreciated!