Checkout my written Post over on the ReplicaAirguns.com Website:
http://www.replicaairguns.com/posts/2016/6/18/kjworks-beretta-m9-differences-explained.html

I was personally confused about some of the similarities and differences between several models of KJWorks Beretta M9 CO2 Blowback Airsoft Pistols, so I decided to make a video where I go over 4 models of KJWorks M9 Pistols and point out the commonalities and differences between them.

Here are the 4 versions of KJWorks Beretta M9 CO2 Blowback Airsoft Pistols:

KJWorks M92 VE Airsoft CO2 Blowback Pistol:
https://www.replicaairguns.ca/kj-works-m92-ve-airsoft-pistol-co2

KJWorks M9 Vertec Airsoft CO2 Blowback Pistol:
https://www.replicaairguns.ca/kj-works-full-metal-m9-vertec-gbb-pistol

KJWorks M9A1 Airsoft CO2 Blowback Pistol:
https://www.replicaairguns.ca/kj-works-m9a1-full-metal-blowback-co2-airsoft-pistol

KJWorks M9 Tactical Airsoft CO2 Blowback Pistol:
https://www.replicaairguns.ca/kj-works-m9-tactical-full-metal-green-gas-blow-back-airsoft-pistol