STANAG magazine
The M27 usually draws ammunition from a standard 30-round STANAG magazine. The improved STANAG magazine with the tan-colored anti-tilt follower is favored over the previous version with the green follower because it can be inserted more easily, and the anti-tilt follower can handle high rates of fully automatic fire with less chance of malfunction. There have been issues with some STANAG magazines sticking in the magwell, especially when painted and or damaged. While a rifleman normally carries 7 30-round magazines, an IAR gunner has to carry up to 16 and may carry as many as 21, because of his role and fully automatic rate of fire. The magazine well has a flared opening that aids in magazine insertion, but a PMAG 30 GEN M2 magazine cannot be inserted because of the frontal plastic bevel on the PMAG.