Bayonet and laser sight are useless. If you have a 16 inch barel bayonet wont fit anyways IIRC, and unless its an infrared laser for night vision shooting and target designation its useless as well. Remember the stresses that items that go on a firearm are under.
My first suggestion would be to make sure that you have a bunch of mags and ammo, and a back up iron sight. After that I would get a white light if you want a good light, pentagon (cheaper but still good) or surefire (the tits is all i can say about it). From surefire I would get a m951 and then get an aftermarket cree or seoul led head. Or a surefire scout light (very lightweight perfect throw for indoor use) The used lights can be picked up here on the EE for cheap. If your looking for a good magnified optic for a good price (also on the EE) get an Eotech 512 (AA battery model) do NOT get the N.Battery model (its a piece of crap) I would also recommend getting a good sling, that mounts on the sides of the rifle, either a two point (vcas) or single point (asp gear sector)
First learn to shoot with the iron sights though, then upgrade.\
Shop on the EE to get what you need.
ETA, just saw that you have a carry handle on there for now., i would just get a good white light and mount. If your wanting to go cheap on the light you could also get a surefire g2led and mount (alot of people use these, I wouldnt but hey its your rifle and your life)
Just ask if stuff is good before you buy crap like CAA, UTG, Fobus, and other crappily made products.