alias +MP5 "buy; ms3; ms1; mclr"

alias -MP5 "mclr"

I use the (+) and (-) signs for closing the menus. The (+) alias buys the items when you press the key and the (-) closes the menus when you release the key. I use the alias "mclr" from above in the (-) alias, since it is the alias I made to close the menus (which is just slot10).

Now repeat that for all weapons, it should look like this:

//Pistols - Menuselect 1//

alias +USP "buy; ms1; ms1"

alias -USP "mclr"

alias +GLOCK "buy; ms1; ms2"

alias -GLOCK "mclr"

alias +EAGLE "buy; ms1; ms3"

alias -EAGLE "mclr"

alias +P228 "buy; ms1; ms4"

alias -P228 "mclr"

//Shotguns - Menuselect 2//

alias +M3 "buy; ms2; ms1; mclr"

alias -M3 "mclr"

alias +XM1014 "buy; ms2; ms2; mclr"

alias -XM1014 "mclr"

//Submachineguns - Menuselect 3//

alias +MP5 "buy; ms3; ms1; mclr"

alias -MP5 "mclr"

alias +TMP "buy; ms3; ms2; mclr"

alias -TMP "mclr"

alias +P90 "buy; ms3; ms3; mclr"

alias -P90 "mclr"

alias +UZI "buy; ms3; ms4; mclr"

alias -UZI "mclr"

//Assault Rifles - Menuselect 4//

alias +AK47 "buy; ms4; ms1; mclr"

alias -AK47 "mclr"

alias +SIG "buy; ms4; ms2; mclr"

alias -SIG "mclr"

alias +M4 "buy; ms4; ms3; mclr"

alias -M4 "mclr"

alias +AUG "buy; ms4; ms4; mclr"

alias -AUG "mclr"

//Sniper Rifle - Menuselect 4//

alias +SCOUT "buy; ms4; ms5"

alias -SCOUT "mclr"

alias +AWP "buy; ms4; ms6"

alias -AWP "mclr"

alias +G3SG1 "buy; ms4; ms7"

alias -G3SG1 "mclr"

//Machinegun - Menuselect 5//

alias +M249 "buy; ms5; ms1"

alias -M249 "mclr"

//End Weapons Aliases//

At this point you can bind any of these if you want like:

bind "x" "+AK47"

bind "y" "+M4"

bind "z" "+AWP"

Most people don't want just a weapon, but if you want just a weapon bind those.