that looks like a KAC mount. - EDIT- Probably not KAC, but looks like the KAC standalone unit. The GL looks like a flare launcher, it cocks from the side above the trigger, and is made out of stampings, definatly Not a real M203
we can do a similar sort of mount though.
I never thoughy therre would be any demand for it....But seems i may have been wrong.
The nice thing about the MK203, is that you could go that route, and once URX's become more common, buy the mount, and be GTG.
Or looks like go Samson/Troy, then upgrade to URX and just need a new mount....etc.