If the trigger on your retro light gun is feeling mushy, here is a mod kit to help.
An eBay seller by the name of MagicTrashman is selling a (almost) drop in replacement micro switch and 3D printed bracket for a range of light guns. I bought a kit for the Sega Saturn Stunner and in this video I install it and give you my thoughts after a play through of Virtua Cop 2.
MagicTrashman on eBay: https://www.ebay.com/usr/magictrashman
They have replacement microswitches for
Sega Saturn Stunner
Sony Playstation 1 Guncon 1
Sony Playstation 2 Guncon 2
Sony Playstation 3 Guncon 3
Nintendo NES Zapper
Sega Dreamcast Starfire
Sega Dreamcast MadCatz
Sega Dreamcast HKT-7800
SNES / Mega Drive Konami Justifier (the blue and pink guns)
Sony Playstation 1 Konami Hyper Blaster
Tunes in this video are from Adam Silady Music. Go check him out, he is my cousin and one amazing musician and guitar player!