I'm writing a series of "spec ops" short stories and need weaponry advice.?

Look up the MSR. It is currently being developed by the US Army. In every sense of the word it is next gen, using sophisticated integral optics, multiple firing modes, and uses caseless ammo.

If the current weapons will be retired how can the tell you what would be in service? All someone could tell you is what is being considered should they have a new completion out for a new weapons system.

A new rifle would likely have more and more synthetic materials such as polymer, carbon fiber vs. aluminum or other metal. Barrel would likely remain metal/steel.

Look at the XM8 that rifle did seem like it would be the next standard rifle but the competition was canceled. Also the SCAR would be one to look at for your story.

LAZER? it's laser.

Well I'm the type of Girl that likes Snipers and Special Opertions use sniper my fave is the AWP am also the type of person that likes missiles so u should add in ur story about a middle crisis that involves submarines

Two weapons have stood the test of time and are still a very useful thing to have are deadly quick and silent> the only noise they make is "WOOSH" Long Bow, and Cross Bow, and catapult.