We just got 350 brand-new FN M4A1s, same configuration. SOCOM barrel profile.
Damn things HAMMER out to 300 yards with M855A1 and ACOGs.
TA-01B with the 7.62 reticle -- crosshairs, not the chevron.
Three kids on the combat shooting team are using the TA-01B, two others the issued TA-31F. All other guns use the BUIS.
They all come with the bottom mount sling swivel. :D
M855A1. The steel-tip stuff.
The carbine and M855A1 seem to match the 7.62 trajectory to 500 yards. The TA-31F is close, but has the chevron instead of the crosshairs at 100 and 200. We're going for points and precision rather than just a hit anywhere on the E-type.
The X, 5, and 4 rings get pretty small past 300 yards:
https://targetsonline.com/store/images/7221472.jpg