Jaeger Precision takes a look at the Tapp Airsoft Hybrid HPA lower for the Action Army AAP-01 pistol. The hybrid lower enables the AAP-01 to use AEG magazines and be powered by HPA. He got hybrid lowers for AAP-1, MP9, and GHKG5, but for this video he focuses on the AAP-1. The package includes the lower, feed lips, gas router, and screws, mostly pre-assembled. The lower uses ARP9 magazines, tested with a quad stack magazine. The video demonstrates installing the hybrid lower onto a standard AAP-01, connecting an HPA tank, and testing at 100 PSI, comparing performance to an AAP-01 with an Infinite kit.

Both G&G quad stack mags and PTS mags are tested, with PTS mags feeding more reliably after installing the provided mag release. The hybrid lower is compared to the Infinite kit, highlighting its use of readily available and cheaper AEG mags. The interchangeability of AAP-01 uppers is demonstrated. He gives a positive opinion on the hybrid lower, praising its comfort, performance, and the availability of AEG mags.