Geonox Airsoft does a gameplay video, using the Specna Arms SA-F03 FLEX as an LMG with the use of a box magazine... "In this gameplay I'm playing on the Area M. It's a 0.5 Joule game day from 14. The airsoft of choice is the Specna Arms F03 with ETU and Mosfet. Today, for once, not with 6 midcap magazines with 140 rounds each, but with a box magazine with a capacity of 2,500 rounds."