I have had my Bushmaster for 13 days and just got some ammo for it today. (They were out of ammo when I got the upper!) When I got home, I took it out and shot a box through it. I had modified the mag per instructions found in one of the forums and it held 7 rounds. I also loaded up a 30 round Sig Sauer 556 mag with 12 rounds. (Also a suggestion for one of the forums.) I touched the first round off and was amazed at the felt recoil or lack of. (Been reading about it on several of the forums. I've got an adjustable buttstock with no limbsaver.) I finished off the other 6 rounds only to find that I had to unfold my folding front sight every 3 - 4 rounds. I then put my 12 round mag in and proceeded to finish it off.
On the way back to the house, I noticed that the rear sight/carry handle had also moved forward. It just didn't seem like there was that much recoil and my shoulder didn't hurt.
After an hour or so, my shoulder started to hurt and then it backed off. It is a warm, wonderful feeling reminding me of what fun it was and will be in the future. I love the wonderful deep bark and the love taps it gives me each time I pull the trigger.
Like I said, I'm in LOVE!