Another guide from Krale Airsoft to help in making a purchase of a railn system for airsoft use... "Picatinny, KeyMod or M-LOK? In this video, we'll compare the different railsystems available for airsoft users, and help you decide which one is the best for you.
The Airsoft Milsim Squad show some Rail/RIS Systems that you can use with your airsoft HK416 rifle in this video... "The HK416, an incredibly popular airsoft weapon and well-tried in the sharp range. Which rails are available in the airsoft area, with which properties and in what forms? We clarify that in this video."
PTS Syndicate sent in updates on their rail systems geared towards serious airsoft players. These are the Enhanced Rail System (with or without KeyMod), and the fully-licensed Centurion Arms CMR Rails in 9.5-inch and 11-inch lengths. Check with your favourite airsoft retailers for availability and pricing.
"PTS Enhanced Rail Section