Master-crafted flamer?

I couldn't find a FAQ for this.

What would happen if you would master-craft a flamer? Since the flamer does not roll to hit it seems like it would do nothing.

Am I right?

That's a bit like asking what happens if you twin-link a power fist.

Yes, a Master Crafted Flamer would gain no benefit over a normal flamer.

Ah. Thanks Thor665!

I thought that template weapons re roll wounds under this situation.

Nope. That's if they're twin-linked, which has specific rules for what happens to template (and blast) weapons that are twin-linked.

The Master Crafted USR has no such rulings, thus it simply does what it says on the tin regardless of weapon type.

Oh yeah. You're right. I remember that. Thanks.

Master Crafted Krak Grenades...

There was a very obscure relevance in 5th: Palladins needed all 10 models in a squad to have different wargear in order to perform full wound-allocation shenanigans; taking a mix of different weapons alone didn't give 10 different builds, so adding a few master-crafted bumps solved this.
Mind you, it made more sense to Master-craft a psy -bolter or a Nemesis weapon anyway.

But it was there!