TAPP Airsoft present their Hybrid MP9 that can found at Evike.com. This takes the classic KWA MP9 and gives it a modern makeover by swapping out the lower frame. This new hybrid setup allows the gun to run on HPA power while using standard AEG magazines, including MP5 and ARP9 styles.

Jaeger Precision goes over the Tapp Airsoft Hybrid HPA MP9 Lower conversion kit, which converts the KWA MP9 gas blowback SMG to use High-Pressure Air (HPA) and compatible ARP9-style magazines. He states his preference for the shorter, 70-round G&G quad-stack magazines to maintain the SMG's ergonomics.

Jaeger Precision uploaded a video to help guide in upgrading a hybrid AAP-01 airsoft pistol with a HPA lower kit, enabling it to use ARP9 magazines. He demonstrates the assembly process, including converting a spare upper receiver and noting the need for additional parts. A power test is included, showing the upgraded pistol's performance and discussing plans for an upcoming airsoft game.

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.