About various HL/HL2 mods and accuracy, I'd suggest people try out Firearms. It's a smaller, more tightnit community which means less smacktards and the accuracy model is much much more er.... accurate
... than CS or DoD.
There are three modifiers in accuracy; 1. stance i.e. whether you are standing/running, crouching or prone 2. firemode i.e. full auto, burst or single shot and 3. use of the bipod (which can be used on any flat surface) for the weapons that have it.. m60 and m82 come to mind.
The recoil is also more accurate and predictable, using a gun climb model rather than random boucning or expanding x-hair. Each weapon has a different recoil depending on size and lethality. For example, the uzi has relatively little recoil due to the 9mm ammo but the g3a3 has much more due to the 7.62 ammo is shoots.
The animation of the attaching (well rebuilding) of the mp5 silencer has to be seen to be believed, just don't do while under fire