well yes there is right know
Fluttermedic (hands are glitched when using non starting items)
I just went on TF2 to look at the previous models, from Kassgrein's Rainbow Scout to your Applejack Engineer. Your engineer's muzzle is actually different from the sniper and scout, but of course you and Kassgrein are two different people so this is to be expected. The engineer's muzzle is fine though.
The problem I'm having with this is it looks like you've pushed Rarity's muzzle upward, which to me looks unnatural and pushed in. Also I'm not going to lie, but this current muzzle to me just makes it look... masculine.
I understand if there are issues with the mask, and you may not want to go back to what it looked like before if the clipping is going to keep happening. If I were you, I'd take a look at Kassgrein's scout and sniper models, as those muzzles are very precise with the MLP:FIM show. Who knows, maybe those muzzles may work out with the masks?