This is the Half Life FGD, but I changed it to be compatible with Counter Life. The HL weapons were deleted and now it has all CS1.6 weapons, except the Glock that already existed in HL, then, and when I put weapon_glock entity in my test map, always appeared a stack of money replacing it. I could add the cs1.6 ammo entities too. You won't find all weapons' clip in this FGD, because some weapons from CS use the same kind of ammo. Then, I thought it wasn't necessary to add all weapons clip. See below the kind of ammo each entity has:
ammoAK47clip: 7.62; ammoM4A1clip: 5.56; ammoM249clip: 5.56, only the ammo model changes; ammoAWPclip: 3.38 Magnum for AWP; ammoM3clip: Shotgun Shells; ammoDEclip: .50 for deagle; ammoFSclip: 5.7; ammoMP5clip: 9mm; ammoP228clip: ammo for P228 (I forgot the caliber); ammoUSPclip: .45acp for USP;
I'm sending in this file the ammo models too. I recommend to install them. You have only to copy or move the models to the cl/models folder and subscribe if they already exist.