Actually the Hammerhead turrets from the M113s weren't moved to the LAVs, same system but one wasn't popped off of one and put on the other, after all M113 TUA was a US Army vehicle, and the LAV TUA is a USMC vehicle....no way in God's green earth that the USMC would accept hand me downs from the army.

Also, the USMC turrets are of newer design, better optics and tracking.

M1134 AT Stryker uses a completely different system designed by General Dynamics Canada and was thought to be what we would put on our own LAVIII TUA vehicles (which there are none left of besides 2-3 prototypes, all have been re-done into ISC vehicles with a RWS MG), but they just took the Norwegian launchers off of our M113TUA, upgraded them and placed them on the LAVIII Chassis. The CDN system is slightly different than the Norwegian system, to the point that the Verlinden kit of the M113TUA conversion is far from accurate for a CDN version. Something I found out the hard way.