Shop › ODIN WORKS MAG EXT FOR SIG 320 +5 BK ODIN WORKS MAG EXT FOR SIG 320 +5 BK $37.05 Odin Works Pistol Magazine Base, +5 Rounds, Anodized Finish, Fits Sig 320 9mm, Black ACC-PMB-SS-320-BLK Quantity: Add To Cart Added! Odin Works Pistol Magazine Base, +5 Rounds, Anodized Finish, Fits Sig 320 9mm, Black ACC-PMB-SS-320-BLK