Can this be done?

[MT2008]

Are the current production Armalite AR-10s really that different from the AR-15 internally? Both guns are, caliber aside, more or less the same weapon. I would imagine that most sears that fit in AR-15s would fit in -10s. And I'm guessing that the methods used to render AR-10s as semi-auto are the same that differentiate the AR-15 from the M16 (re-designed bolt carrier, narrow bolt carrier channel, filled in rear lower receiver).

And an M203 would be an easy fit as well, I imagine. The sleeve that fits an M16A2 with 20" barrel should work fine, but if not, the M203A2 would work just as well with RAS kit (and I know I've seen that available for AR-10s).

I am, of course, talking out of intuition.