2nd=Good+Substantial
Ultimate Member
It’s also good if you have 300BLK PMAGs in addition to 5.56 ones. The 300BLK ones don’t have a windowed variety so if you buy them and then only buy windowed ones for 5.56 you can easily tell the difference. Sure you could get FDE mags for 5.56 but some people prefer the black magazines.
I went the other way. Window for 300BO and non-window for 5.56. Other than being labeled 300BO, are those mags any different from the ones labeled 5.56?