Anybody has any recommendation which Trijicon should I get for my A2 Colt Match HBar 20 " barrel, I can't decide which one should I get the TA31 or TA31F. I like the reticle on TA31F but from what I did read TA31F is design for flat top receiver.

How accurate is that red doughnut on TA31 @ 200 yards

Any empirical knowledge,recommendation? Thank you.

The ACOGs are designed for specific configurations and calibers

The F model TA31 is a flat top model 14.5's

The TA31 (donut) is designed for the carry handle and 16's

I believe the TA31 RCO A4 is the ideal flat top for 20"ers

Of course you can make them work otherwise but it would be best to consult the customer service desk at Trijicon

or call Mike @ csgunworks.com.................he knows this stuff inside out.

Quoted: The ACOGs are designed for specific configurations, calibers, and Load The F model TA31 is a flat top model 14.5's The TA31 (donut) is designed for the carry handle and 16's I believe the TA31 RCO A4 is the ideal flat top for 20"ers Of course you can make them work otherwise but it would be best to consult the customer service desk at Trijicon or call Mike @ csgunworks.com.................he knows this stuff inside out.

Fixed it for you