Having a look at Weaver's musings on
What If the British Army bought the M113? as an alternative to the FV430 series, I'm curious if any M113 variant was ever produced with a low-profile hull along the lines of the FV433 Abbott SPH and 'Falcon' SPAAG variants of the FV430.
The only thing that immediately springs to mind are the sort of flatbed type conversions on the M548, Tracked Rapier etc. but they still have that high cab at the front that doesn't really lend itself to a traditional tracked SPH silhouette.
I suppose the silhouette of the Lynx reconnaissance vehicle (M113 C&R) isn't far off, bit it still seems fairly tall at the back (compared to the FV433 hull), and obviously would need expanding back to original M113 length (and width?) or even extending, to fit something like an Abbott turret.