-PMI Piranha Pro TS (Added Storm Electronic Trigger, 14" All American barrel, and Ricochet AK Electronic Hopper)
-Sheridan PGP (Added C02 quick change, wrap-around rubber grips, velocity adjuster, quick loader, and new pump handle) held at my side by a cops911.com tactical holster
Mildly reduces heat in the mask. Easy to install.
I bought this hoping it'd really reduce the heat inside the mask, but it only did so mildly. You barely feel a small cool breeze from the fan, which helps, but it simply isn't enough. Luckily it isn't too expensive, and it's super easy to install. It just needs more power though.
Overall, if you have the money to burn go ahead and buy this product. It'll help a little bit. Otherwise your money is better spent on some elbow pads or a new bolt or something.