Alpha Parts CNC Charging Handle Cocking System Set For Systema PTW M4 (7.5 - 9.5 inch/ Short Version) Net-Weight-(g)_977 so it was proposed that

so it was proposed that the modularity of the M16 series would allow a user to replace the upper receiver of an existing weapon with one more suitable to the task

Style: Nunchuck / Crane Stock Type

Cheek support

G&G Dual-Profile Fiber Optic Flip-up Iron Sight

This will have less resistance on the BB and will NOT decrease the velocity but increases Accuracy instead

Alpha Parts CNC Charging Handle Cocking System Set For Systema PTW M4 (7.5 - 9.5 inch/ Short Version) Net-Weight-(g)_977 so it was proposed thatKey Feature Metal Construction Airsoft Charging Handle Design For Upgrade the Original Airsoft Parts More Durable Suitable For Systema PTW M4 Series Airsoft Rifle (Outer barrel length: 7. 5 9. 5 inch)