Alright.
Got my new upper sighted-in with irons and my micro. Smoothest shooting setup I've ever run.
Used a Vltor A5H4 buffer, wolff RP rifle spring, LMT E-carrier (w/ std LMT bolt), and a Rainier Arms Mountain Series 18" barrel with rifle length gas system. Rail System is Rainier Evo 15".
I had nobody to hold the camera for me, so I used one hand to hold the camera (away from the gun) and the other to shoot. I had a BFG VCAS padded sling, but it wasn't much help with one handed shooting.
Muzzle dip doesn't seem to be a problem....but I wasn't able to evaluate flash since it was very bright out.
Recoil impulse was softer than a BC...much more like my FSC556 equipped BCM 14.5" middy. However, the side blast and concussion was much reduced from the FSC556 when shooting from under a metal roof. I also shot from prone, but the ground was wet so no info on dust kick-up.
https://vimeo.com/83536152
Bottom line, I'm VERY pleased so far. Only ran about 90 rounds through it today...but I'm very happy with the performance. More shooting impressions later...I got a hot date for the evening.