The new Black Box magazine from Black Collar Arms delivers 15 rounds of 223/5.56 or 300 Blackout from a smaller external footprint than our competitors’ 10-round mags.
Black Collar Arms
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The new Black Box magazine from Black Collar Arms delivers 15 rounds of 223/5.56 or 300 Blackout from a smaller external footprint than our competitors’ 10-round mags.