If you liked the derringer you will love this as a bottom feeder. Fixes all the issues:
2 piece post/pin- no spinning, and in the odd case that it does you can tighten it down
Top air- no more leaks
Orings actually fit correctly.
Actually I never had any problem with the Derringers, I like um as much as the Stumpy's.
I don't have an issue with any atty I've received from you...!
Love um all.....!!!