I recently switched my Aimpoint T2 to my main HD gun which is a 16 inch Daniel Defense lightweight barrel. The 2 MOA dot really helped tighten my spread from the previous T1 4MOA. From bench with Atlas bipod and rear bag I was able to get 1 - 1 1/2 inch groups at 50 yards with IMI razor core ammo. At 100 yards the groups were around 3 inches (no magnification and stock trigger which isn't precision oriented). Just having the smaller dot helped tighten it up. The Daniel Defense was rock solid reliable.. don't think it's had a hiccup yet of any kind in several thousand rounds.

My old T1 4MOA I put on my Angstadt Arms PCC 9mm. From bag no bipod and Blazer ammo I could get groups basically touching at 25 yards (far exceeding my Glock accuracy). I did the custom version $1849 which they roll out every few months a different color scheme and has the upgraded Timney PCC trigger. It uses Glock magazines and locks back. I've had 1 FTE through about 500 rounds. Super fun gun to shoot.