EO Tech 551? What is the dot size? Bushmaster catalog saysd 1 MOA. That seems too small to beleive. Anyone have any comments about these, and who has them at a good price? Thanks.

It's a 1 MOA dot with a 65 MOA ring around it, so you can actually make pretty good use of it.

[IMG]http://pt.zkiller.de/uploads/eoreticle02.jpg[/IMG]

Thanks for that  nice picture. Could this scope actually be usefull at 600yd matches at a std. 600yd. prone target, which has a 36" diameter black aiming ring. Thanks.

i would suppose a 1 MOA dot would allow such a shot, but i don't shoot matches. i hope you'll get a better answer. Never shot an AR15 past 300m or so.

As most red-dots are on 16" ARs believe your not gonna get much practical use at the 600 yard line. As most 20" - 24" "service or F-class rifles need 11-13 minutes of elevation change and the outer ring if held at the 6 o'clock position would be 32.5 minutes up (or 195 inches up at 600 yards), ya'd have to take a "swag" in-between, which is not that practical, when your irons or BUIS will get ya on the money.... or much closer.

I have used my EOTech equipped 16" RRA M4 out to 400 yards and managed to place most rounds on the chest sized steel plate we have there, using Q3131A. FWIW, this is well past the frag range of M193 ammo, and although I have taken shots at 550, 625 and 700, using the same rifle, hits at these ranges using the red-dot or outer ring are mostly luck and inconsistent at best. Past 3-400 yards is typically not practical w/ a M4 16" rifle and is what having a 20" or 24" upper is for....

Mike

Good answer. Thanks for the info.