You have to get some Sticks, the Coffins are a pain to load and the drums are big and do make holding the front odd.. Those stick mags are double stack and nice!
The new upper is about 8 Lbs., the lower is 3 lbs., a full drum 5 lbs., plus the subgun silencer is another 1.5 lbs. and sticking out 12".........I might just slap on a bi-pod on and shoot her off the bench.
But bring some sticks with you to the next shoots. I'll definitely be at the 5/20 shoot (I'm the RSO), but not sure about one on the 5/12.