Shotgun opens up a lot of armors part wise. Now Hammerhead is needed for itself, Tiger and Mk10- Nightclub for itself and Romeo- and Sneaky is just Sneaky. The ones they can make now are in bold:
MKVIII
(Mk7, Centurion, Striker parts)
MKIX
(Centurion, Mk7, Heartbreaker parts, aka Python)
MKX
(Mk7, Hammerhead, Heartbreaker, Snapper parts)
MKXI
(Centurion, Mk7, Heartbreaker parts)
MKXII
(WM2, Centurion, Mk7, Shotgun, Heartbreaker parts)
MKXIII
(Mk7, Centurion, Shotgun, WM2 parts)
MKXIV
(Striker, Centurion, Mk7, Heartbreaker, Shotgun parts)
MK15 Sneaky
(one off design)
MK16 Nightclub
(one off design)
MK18 Casanova
(Mk7, Centurion, Heartbreaker, WM2 parts)
MK19 Tiger
(Mk7, Hammerhead, Mk7, Striker parts)
MK24 Tank
(Heartbreaker parts)
MK26 Gamma
(Striker parts)
MK27 Disco
(WM2, Centurion, Mk7, Shotgun parts)
MK28 Jack
(Heartbreaker, Mk7, Centurion parts)
MK29 Fiddler
(Mk7, Centurion, Heartbreaker, Starboost, Striker parts)
MK30 Blue Steel
(Centurion parts)
MK31 Piston
(Centurion , Mk7, Striker parts)
MK32 Romeo
(Nightclub, Centurion, Heartbreaker, Mk7 parts)
MK34 Southpaw
(Mk7, Centurion, Snapper, Shotgun, Heartbreaker, Striker parts)
MK37 Hammerhead
(one off design)
MK23 Shades
(Shotgun parts)