How can I smooth out gun+player movement in my 2D platform shooter?

[RMDB]

i guess it’s an origin problem…
you should set the gun centering the handle e moving the origin at center to avoid the offset…
i also requested a feature to remove this problem.

Flip sprite from any given origin's point

Actually GD flip any sprite from 0,0 as basic origin… I wonder if it could be done for any origin position…as standard so u don’t need to correct the offset after flip…to have a perfect mirroring that can be achieved only centering the origin… i dunno maybe i need to call this flip from center…or mirror…i dunno… …i mean who gonna need an offsetted flip?..