I have not had the chance to closely check the type of rifle being used but the width of the magazines make me speculate that it fires 7.62mm caliber bullets. The soldiers are probably using the Belgian FAL rifles that chambers 51 rounds per magazine (the US M-16 use a smaller 5.56mm ammunition with 30 rounds/ magazine ). The FAL is arguably one of the deadliest rifles in the world. I dwelt a bit on this detail to illustrate the damage that it can cause on the delicate human flesh.
The photo is close to the actual size and the leftmost bullet is the 7.62mm. Imagine the damage that it can cause to the human flesh)
Stop the killings in Burma now. Bring the country under UN supervision until things have normalized.