Dangit, I forgot to grind that flat on the back bottom/underside of the cradle! I've done it on other cradles in the past, so I swear I totally already know it's there, I mean it's fairly obvious. Hehe
But then there's a lot of details I'm kinda just not adding. This personal version of this blaster (MGC) has been a work in progress for like 6 or 7 years. Before that I had a Denix that I sold off, to someone right here on this forum. It had a MR old version bull barrel, and I really can't even remember what else, I'm pretty sure it had a Gavidoc flash hider, which was actually really nice. But I don't recall what scope/mount were on that one. Maybe MR.
Anyway, I guess what I'm saying is that I may EVENTUALLY take this one as far as you have, kpax, but that might be a few years, yet.
I don't abandon this one for very long before tweaking something else!