From publisher blurb:
This sourcebook PDF is an additional continuation of the first three, Weapons of Power Armor Destruction, Weapons of Power Armor Destruction 2 and Weapons of Power Armor Destruction 3. We have added all kinds of new power armor superstructures, power armor weapons and all kind of new and interesting things that can be used in your local neighborhood game. Included in this PDF are such add ons as:
Skin Suits (PL 6)
Smart Light Power Armor (PL 8+)
Chaotic Mineral Array (PL 7)
Inertial Winder Power Core (PL 8)
Kirllian Aura Tap Power Core (PL 7)
Chaff Launchers (PL 5)
Point Defense Lasers (PL 7)
Chronal Punch Gauntlets (PL 8)
Firefog Dispenser (PL 7)
Omni-Weapon Skin (PL 8)
Warp Channel Weaponry (PL 8)
Tailgunner Suit Brain (PL 6)
Plus another additional 20 more interesting and unique weapons and equipment to use on your power armor.