Shortly after NATO's acceptance of the 5.56×45mm NATO rifle cartridge, Draft Standardization Agreement (STANAG) 4179 was proposed in order to allow NATO members to easily share rifle ammunition and magazines down to the individual soldier level. The AR-15 rifle is the most commonly known weapon platform to use this type of box magazine.

PMAG rack is best for any mag that fits a STANAG (or NATO) magazine, which are AR-15 type magazines. If you are a little short on space and only own United States Government Issue (USGI) metal magazines, the STANAG model might be a better option.

I printed these on my P1S without any supports using default settings for PLA+.

Printables Tags: magpul; ar15magazineholder