The SR9 is essentially a redesigned HK91, to make it more of a sporter rifle. While all HK’s display good accuracy, the standard SR9 does not meet the everyday accuracy standards of sniping. But the (T) and (TC) versions of the SR9 can make nice sniper/marksman’s rifles.
The (T) is the target version of the SR9 and uses the PSG-1 trigger group with the MSG-90 adjustable stock. The rifle is tuned for better accuracy and will shoot down around 1 MOA with some good ammo and a good shooter. If a semi-auto is required for your team, and your running a pretty tight budget, the SR9(T) might deserve a hard look. HK has always made a high quality weapon.
The (TC) version of the SR9 even takes the accuracy of the (T) model one step further. You get the fully adjustable PSG-1 buttstock. This is suppose to be the competition version, and should be fairly accurate, maybe even sub MOA.