Geissele 6mm ARC 20 Rounds Rifle Magazine Black. Specifications for Geissele 6mm ARC 20 Rounds Rifle Magazine: Manufacturer: Geissele Color: Black Finish: Nitride Magazine Body Material: 410 Stainless Steel Magazine Capacity: 20 Round Caliber: 6mm ARC Overall Length: 3.5 in Features of Geissele 6mm ARC 20 Rounds Rifle Magazine Improved one piece construction Laser welded 410 Stainless Steel Body and mating components Anti-Tilt Follower Corrosion Resistant Please note - this magazine will work with 6MM ARC and 6.5 Grendel cartridge Package Contents: Geissele 6mm ARC 20 Rounds Rifle Magazine Geissele 05-3232: 6mm ARC 20 Rounds Rifle Magazine Black