I just bought my first AR. It's a Stag model 1 with detachable carry handle. I always shot expert with my M-16 in the USAF but it was only at 25m on different size silhouette targets. I shot the Stag at 50 yards and did pretty decent. At 100 yards I had a hard time focusing on the yellow targets I had with black crosshairs and a black diamond bullseye. These were standard printer paper size and I had a hard time seeing the center of the paper let alone the bullseye. I'd like to get proficient with open sights before I get into optics. I'd like to shoot at 100 and 200 yards. I just bought a spotting scope today to see where I'm hitting. Any ideas on targets for these ranges?