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).
• Modular design allows lower to be changed to different lowers. This makes the adapter interchangeable between M4, ARP, Shotgun Shell, etc. (Lowers can be found here)
• Gas magazine included and pre-installed with single stack mod to allow faster BB flow.
• Friction-less BB stop allows smoother feeding and prevents BB loss while reloading.

Compatibility: Elite Force, UMAREX GLOCK and other GBB Pistols w/ VFC Blowback System | SAI BLU, ISSC M22, Lonewolf, ZEV, G&P Custom, P80, AAP-001 and other GBB Pistols w/ WE-Tech Gas Blowback System | Not compatible w/ KWC, WinGun systems