http://www.thetruthaboutguns.com/2012/06/joe-grine/gun-prreview-remington-modular-sniper-rifle-msr/
If this info is accurate and this does go into service, then 22" looks to be the barrel length.
Hitting clay pigeons at 1000 to 1400yds without issue. That is some fine shooting for sure.
Send them out to a F class match, I think they will do very very well.
Jerry
Well shyte, now I want one of those!