Weight, simplicity and ease of use are the top three in my mind. My GF is 5’3 as well and she really doesn’t have any problems shooting my rifles, though the rifle she finds easiest to work with is my LMT 14.5". Its my lightest rifle and is very easy to handle and shoot as it is very simple. My light (x300) is run at the 12 o’clock in front of the FSB so its not in the way and she can place her hands anywhere comfortable, the VFG is a quick detach tango down so if she doesn’t like it (and this happens to be the case) she can take it off easily. No Redimag as it obscures the boltcatch and increase weight and difficulty of manual of arms. I made sure all the edges are smooth (i.e. file down rough edges on the forearm rail covers and pistol grip, most female hands are relatively soft. And I made sure to have a comfortable sling, so that she don’t have to hold it up the whole weight of the gun all the time (a padded sling is a plus, the Padded VTAC worked terrific).
Here is a picture of the rifle my GF prefers:
Here are my suggestions from my personal observations:
-Guns are loud, especially fired inside, make sure to double plug her earpro and don’t add a comp. The advantages of recoil control are not worth the potential flinching from the louder sounds, the recoil from 5.56 rounds is not bad to begin with and in my personal experience most shooters flinch from the report not the recoil impulse.
-If the recoil is beating her up, add the weight to the butt of the gun, its easier to support. And while we’re talking about buttstocks, an adjustable one is a must. I love magpul ctr’s and moe’s. If you need to go heavier I’d look at the viltor, ACS and MBR. I didn’t like the SPODMOD that came with my lmt lower because the edge of the stock was rough and would irritate my face (but thats just me). If I really cared I would have filed it down but I can sell it easily so no worries for me.
-Keep it as light as possible I would run a carbine length 14.5" w/ pinned flash suppressor, and a VTAC forearm if I was building a gun for my GF. Unless she wanted to run a light at the 12’ I would stay with shorter rails for weight considerations.
-Use rail covers everywhere necessary, especially if you’ve got a picatinny rail, and make sure the edges are smooth, no exposed rails.
-RDS make the rifle alot easier to shoot, get one that can cowitness with quality iron sights so that you can train and employ both. Aimpoint M2/ML2/T1/EoTech/all come to mind.
-I really like the magpul MIAD pistol grip as it is adjustable to fit small shooters and very comfortable.
-The VTAC padded sling is terrific and very comfortable on the neck during transitions and for supporting the rifle during long periods of time.
-I would not add a redi-mag, or any crazy pressure switches, buttons etc. Keep the weight down and keep it simple.
-For a light, use a simple G2 in a viltor / VTAC / Larue / etc mount. that is easy to activate and stays out of the way.
And finally make sure you two are having fun shooting together:D
GU