Babushka says not one step backward. Every seventh shot, she gives a damage bonus! Also, the thing starts active, making her one of very few buffers with a start-of-battle skill activation. Her first skill is still defensive in nature, and the percentages got bigger. She's actually useful in a number of situations, either for reducing enemy firepower in specific fights (usually Gundam or tank related) or just the straight DPS boost from the get-go. You only really need her up to Mod 2, but the Mod 3 art is cute.

Her pre mod form is here

Comparable to the Browning Potato Digger. There must be something about early model machine guns. Her skill gives her an extra long belt that activates three seconds in, and unlike Potato Digger, who sacrifices accuracy and gains firepower, she instead sacrifices reload time while gaining accuracy. While the extra reload time is a pain, she does buff other dolls while reloading instead of being useless. The accuracy boost is nice, but not a game-changer. It may help vs. enemies with a moderate amount of evasion though, given typical MG accuracy is kind of mediocre.

Another of those HGs that buff based on leadership position, with the Squad Lead getting an alright shield and everyone else getting an FP boost (as opposed to P22 which is positional based). Sometimes you might need that mix. If you do, there you go. Else, she's basically a slightly off-brand P22.

3* Ribey.

The problem is Ribey herself is only borderline viable to begin with; she has some of the lowest DPS of any AR herself and almost completely relies on her buffs to make up for it, which usually works out to a net positive, but not always.

Vepr has both weaker stats and weaker buffs (both skill and tiles), and you won't get dupes of her. Really no point in bothering with her, the free SAA you get from career quests or any 4+ star AR will give better results.

3* equivalent of Colt SAA. Useful if you're short on REAL AMERICAN GUNS, but given that SAA is easier to get, probably more a trophy raifu.

At some point, G&K started running out of real guns and broke out more of the early 20th century guns.

Surprisingly, the dolls with them are actually not godawful.

If she's the leader, she gives a general buff, but whatever, most HGs do that. What makes her interesting is that if she's NOT the squad lead, she buffs the hell out of them, thus making her useful in any formation where you want to pack as much as possible into one doll's ability. Lookin' at you, M4, IWS. (And a few others)

Suffers from not only being an MG, but an inconsistent one due to her passive. Her stats are alright, but her passive skill is unreliable, not that it matters much since it only activates on reload. The active suffers from the problem of activating slowly enough that you'd expect MGs to have already killed most of what you'd want to stun anyway.