She's not bad. Actually, to be honest, she has better DPS than Lee-Enfield until Lee's special equipment is available, and is pretty reliable. However, she is releasing after other rifles have come out on EN like R93 and M14mod that supplanted her on other servers, so she might not be a priority for you depending on what you have.

FN49 for short. Has a mod that turns her into a more powerful FP-buffing rifle than baseline Lee. Until then, she's okay-ish for a free unit to pair with M14, but has plenty of better alternatives available.

For more info on her mod look at this article

The famed Tactical Tuna. Will do as well as OTs-12 if you're extremely hard up on resources and need another AR immediately for whatever reason. You won't likely need it since you get the AR team early but if you absolutely must have something or it must be 2 star...

The Right Arm of the Free World

There was a time she was good. That time was before we got grenadiers that shot as fast as she does. She does fire three grenades though, although they are weaker than everyone else's. Has the odd use here and there, but time and powercreep have not been kind to her.

Decent Aura shape with very good benefits. 30% RoF/20% Crit is nothing to sneeze at, and even more from her skill. Used heavily in teams that benefit from RoF/Crit boosts (mostly general use Rifles). Be thankful EN got her with little effort. Also has a 97 dodge, if you need something to temporarily take the front. Also, the source of a lot of Korean memes because she was a total pain to get. Also wears a ferret costume sometimes.

Also somehow still relevant in ((current year))

Choco tabemase? You get her for free and she performs OK. Has a long history of suffering in the game and may suffer from PTSD. Damage bonuses are nice, and she's just strong enough to take down a Jupiter cannon by herself, provided you have some cannon fodder between her and the Jupiter (which is mostly why she has PTSD).

She used to perform really well, and she does perform OK for cost to raise, but a 5-star and 3-star AR cost the same to actually use, and the newer ARs are much, much shinier. She's still OK but don't get too attached, you'll have better soon enough. Maybe she'll get a mod someday.