This tutorial will teach you how give the player the Shotgun.
Making it pickable
Create a test room. Insert an item_hlvr_weapon_shotgun entity. You can set the initial ammo via the property Spawn Ammo.
Giving it on spawn
Insert an info_hlvr_equip_player entity. Set the following properties:
|Equip on Map Start||✓|
You can set the initial loaded ammo with the following property:
|Loaded Shotgun Ammo||7|
You can set the backpack ammo amount with the following property: