The Heresy Group shows the SCAR-L M-Lok Kit made by Airsoft Artisan which is based in Hong Kong. Installation is not a problem as Tim also does a step-by-step procedure on installing it on the Tokyo Marui SCAR-L NGRS AEG which can be done in 15 to 20 minutes. If you dig it, then you can get one for 30 quid.