Help needed, can my laptop handle these games?

 i was wanting to play more games cuz summer is here! but i am not sure if my laptop can handle them!

i have an idea pad u460

4gb ram, intelcore i5 2.67ghz

geforce 305M

and a tonn of HD space

it playes mass effect 2 sMoothly, brink smoothly, Sins rebellion, dead island, tropico, split second, MW2 but not MW3- it lag's

but i wanted to try Arma2 CO mod Z , Mass effect 3 and BF3

i looked & talked to ppl but i am not sure anymore !

any opinions or help would be appreciated!

thanks!