[grss1982]

Hey what ever happened to the knife mounted on the ARX-7's head?

Just to be sure....

Spoiler:

IIRC, Sagara first used it in the fight with Gauron (Episode 6/7 of FMP), but in the OP and even from the 1st to last episodes of FMP: TSR, it's not anymore there. Instead the Arbalest gets a knife mounted on its left hip.

Pics from FMP: TSR of ARX-7 without said knife.

Pics from OP in Episode1 TSR:
http://i2.tinypic.com/x38rrn.jpg
http://i3.tinypic.com/x38s1y.jpg
http://i3.tinypic.com/x38s51.jpg

Pics from EPISODE1 TSR:
http://i2.tinypic.com/x38sih.jpg
http://i1.tinypic.com/x38twn.jpg
http://i1.tinypic.com/x38unl.jpg