It states that the T-Fal caliber is .308 and you can read more information about it at http://forum.pafoa.org/general-2/76532-stg58-7-62-nato-caliber-fal-rifle.html
The SA58 FAL Spartan Rifle is a .308 Caliber rifle with an 18-inch barrel.
The FAL was predominantly chambered for the 7.62x51mm NATO round. FAL is a...
The T-rex rifle is .577 caliber.Is there anything else you would like to ask?!
A T sized shot is 20 caliber.
The .577 T-rex has a 14.9 mm diameter 750-grain bullet that moves at 2,460 ft/s...