Features The Tapp M4 Modular Adapter converts your traditional gas airsoft gun to use HPA and accept standard M4 AEG magazines (super-feed mags recommended) Competition M4 Lower features flared magwell for faster reloads Modular design allows lower to be changed to different lowers. This makes the adapter interchangeable between M4, ARP, Shotgun Shell, etc. Friction-less BB stop allows smoother feeding and prevents BB loss while reloading Optimized internal design provides consistent feeding and performance Recommended 90-100 PSI Specifications: Compatibility: Tokyo Marui, EMG, WE-Tech, AW Custom, and Other Compatible Hi-CAPA Gas Blowback Airsoft Pistols Magazine Compatibility: Accepts most M4 Airsoft AEG magazines Materials: DuPont polymer ⬇️ Check my page for other items of interest! I combine shipping on multiple orders whenever possible, and will accept reasonable offers.