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