http://www.kxly.com/news/?sect_rank=1§ion_id=559&story_id=11184
It seems the shooter was a white guy with an SKS rifle. To my knowledge (I have an SKS) the SKS is semi-automatic only and uses a 7.62mm round (same as AK47). It is classified as a curio and relic by the ATF.
They are now saying he had an AK-47 *and* an M-1 (Garand or carbine they don't say). They also say that about 125 shell casing were found outside near the courthouse as was the M-1, and another 60 or 70 inside the church. He either had a full auto AK, or a very tired trigger finger, since all this shooting took place over about a 30-45 minute period. For the AK, that could represent more than 6 fully loaded magazines.