I instantly felt in love with this MOC of LEGO by Sam Cheng.
This is a kinda BB / SD / Chibi version of the Dino mode!
The back of the details was good as well with moveable arms, legs and tail.
If you are wondering about the scale, here is a comparison with a LEGO T-Rex and minifigure.
Wait there is more! It comes with light in his mouth to breath FIRE!!
It get more awesome when it transform into Robot mode!
The detail like a custom Autobot stickers and original golden chrome rings make it stand out!
You can change the eye visor color to be angry mode.
or give him a crown as a King! Yes Grimlock is KING!!
In Bot mode he comes with his weapon just like the G1.
Personally I am very impressed by Sam creation of this version of Grimlock!
You can view more in high res at Sam account