420RD HI-CAP POLYMER MAGAZINE FOR AR-15/M4 – BLACK

If you want more capacity, but don’t want an extra long mag which gets in the way when you are prone, this magazine fits the need! The 420rnd High Capacity Polymer magazine holds a whopping 420 rounds, but in the same length of magazine as a standard 300 round high-cap! The magazine is constructed from high density polymer and weighs less than a steel 300 round mag to boot!