Well that's a great and truly appreciated response. Still waiting on M4 as it slowly wends it way via Canada Post to my dealer. The MT Handguard sounds fascinating - I'm guessing with that the right arm and the handguard absorb some of the recoil / blowback. Once I get the gun and all the basic stuff - tools etc - I'll look at improvements like the hand guard. Aimpoint scope sounds like the bomb - but I think that would be most helpful once I graduate to slugs and longer distance shooting. As you can see, I'm still very much learning! Thanks so much for the great response