I recently purchased a TA-31F that was fresh from the factory and have seen a newer TA-31RCO M4 come out on the EE. Is there any major difference besides the nifty side lines? Do these lines in the RCO compensate for windage or lead. I really like my TA-31F ALOT, but now i'm debating on trying to get rid of it for a TA-31RCO M4. Is the BAC and calibration different, maybe different grain bullets?
Anyone out there have an RCO M4, How do you like it???
I'm a Trijicon fanatic when it comes to ACOG's, I believe they are the best sight available IMO. I have no problem keeping real tight groups at 600+ yards with all the ones i own.

Search is your friend. There are 2 threads on this optic that were started in the past 30 days. Just use "31RCO" for your search.

Quoted: Search is your friend. There are 2 threads on this optic that were started in the past 30 days. Just use "31RCO" for your search.

Here's one:TA31RCO