12 gram seal for BT SA-17 (that doesn't turn to moosh / old stock)

[mueller]

Looking for 12G adapter to get a BT SA-17 back up and running

hesitant to buy a parts kit, had a "new" one turn to moosh after 2 shots, need a good part.

[Alexndl]

Some member are printing 12g face seal in TPU
Maybe check with XEMON

[XEMON]

Its on my "To Do" list, but i have a few things ahead ...
Il post when i have them ready