Simple and easy - Vortex Spitfire HD Gen II 3x Prism Scope

Picked this optic up, saw some negatives, saw some positives. Will admit that the optic does have to be on the last rail next to the charging handle to get clear optic picture, but use is great. Sighted in low right, 15 ticks up, 6 ticks left and was smacking bulls eyes in a quarter grouping at 15 yards with a small target to simulate distance. Optic never broke free, never loosened on picatinny, and once set, did not have to readjust. This optic is definitely worth it's weight running at 100 lower. The rectical lights beautifully, and very easy to transition between one and two eyes. Getting the sight picture was very easy, had it almost as soon as I lowered my cheek to the butt stock. I still need to run distance, and use the distance hashes, but as it stands, 0-100 this optic will serve me well. Easy to install, easy to use, easy to sight, and not $4000