Name That Cup Seal

[DropDeadFred]

I found this inside an old Deringer Mach II and im having a hard time believing this cup seal is stock. Any ideas? Thank you.

[Ecapnation]

Looks home brew to be honest

[Painthappy]

Looks home brew to be honest

I would agree. Or worn all the heck... But yeah, looks like something someone made.

[bacci paintball]

Looks like a Wintec cup seal out of a Thunderbolt. I haven't used them enough to offer any insight on the effectiveness of the shape. The Derringer Mach II was made by Wendell at Wintec so likely the stock cup seal.

[capitalpaintball]

I have a bunch of them, tend to strip out pretty easy. I always thought they were Lapco, Dont know why.