This PANTAC Equipment Bag is suited for anything you want to put inside and if it had to be a rifle, anything the size of an M4 or smaller would fit inside so long as it's shorter than 71 cm in length and 34 cm wide.
There is plenty of space in ever compartment you look in but lets start at the main one. Anything you put inside will be safety secure without any possibility of falling out as there are zillers, buckles and velcro keeping it all contained and together. Inside is another bag L68cm X W22cm. This bag equals security.
Another compartment space is at the front that you zip open. It is the size of the bag but with hardly any depth as it holds something rather slim. You could hold it with your hands or you could carry it over your shoulder. Either, everything inside will be safe and secure!