Colt M4 CQB-R
Colt Licensed M4 CQB-R Carbine Airsoft AEG Rifle by Cybergun / CYMA (Package: Add 9.6v NiMH Battery + Charger)
make sure you watch these videos at the timestamps.
• Video
4:10
• Video
5:10
• Video
3:00
Thank you so much trifecta airsoft.
https://www.evike.com/products/66391/