I have a friend who also has an AR-50 and have shot it several times on our 700 yd. range.
Recoil not bad at all, however the blast from the brake will clean off benches on both sides.
Pull is much too long and I have a problem getting up to the 42X scope but can usually keep milsurp on a 12" target at that range.
We trade out shooting each other's 50's, he likes to shoot my .500-3" BPE DR.