This is for those of you that may not know, but it is actually possible to bring the M41A and glock over to a map that you never opened in old level editor. Basically follow these steps:
1.) Create a new map and open in old level editor.
2.) Add a weapon and give it the model id: gun_m4a1 or gun_glock (many people probably know this by now)
3.) Save it and close the Old Level editor
4.) Open the level with the Advanced level editor.
5.) Click on the weapon and DO NOT modify the weapon model (if it says ERROR over weapon model, then you have done it correctly)
6.) With the weapon selected, hit ctrl+c to copy it.
7.) At the top of the screen, click "open map"
8.) Select the map you want the gun in and open it.
9.) Hit ctrl+V to paste the weapon into the map.
You can paste it multiple times, enjoy your OP weapons comrades!