Point Store and CS:S guns

IS there any way I can add CS:S guns to the points store and allow users to buy them? I have tried before and it didn’t work properly. You where able to see the guns in the point store and would allow the user to buy it but would not give the user the gun. Is there any way?

Get the old code you used to use and make sure the player doesn’t already have an item equipped because then it’d not give it