ACM Lan-style Adaptive Magwell for M4 / M16 Airsoft GBB / AEG - FDEAluminum construction Upper component is then slid on from the front and attached with two allen screws Increase the diameter of the magwell & speedy reloaded Fit for M4 M16 Airsoft GBB AEG

Oil resistance / bore up size for better seal

an extremely compact

- Enlarges loading entrance for easier and faster reload with Extension Pad

- Reinforced front and rear post with stainless steel screw

Item# GLK-13

Grip Screw (Gold)

- SFA Delta type

Item# AV-GLK-01

For Guns Modify housing only

- Barrel tip end has Negative -14mm Thread

- The same length with the lower

- RMR style Dot Sight x 1