is it possible that graboids, and a**blasters from tremors inspired the mutos?

i wouldn't think so

yeah i know, still though thought this might bring a few good laughs to everyone :)

There's definitely similarities in the jaws.

I am agree with Duratok. I remember that Gareth Edwards stated that to create his new monster had watched others evenfrom  B movies (for my opinion the original Tremors does not fall in this category, it was very well done for its time and it is one of my favs too), and doing so he created and amalgam. FOr me the similiraties in the physical look are with Cloverfield (pretty obvious), Graboids, Legion soldiers (Gamera), and the bugs from Starship troopers (whose have similairities with Legion soldiers and Mother Legion herself too).

i Loved this movie when i was little and i agree on the jaws

It is possible. Gareth didn't mention them by name, but their mouth shape is fairly Muto esque.

However, I'd say that Starship Trooper bugs were a larger inspiration, evidenced by the sharp curves rather than the slightly smoother droop of the Graboids mouths.

Naw I think the mutos were inspired by the Starship Trooper hunter bugs