Shop › matchsaver double spare 12g holder Image 1 of 3 Image 2 of 3 Image 3 of 3 matchsaver double spare 12g holder $16.95 3d printed with steel M-Lok hardware. Allows you to keep 2 spares right next to the chamber for quick grab and drop in Quantity: Add To Cart Added! 3d printed with steel M-Lok hardware. Allows you to keep 2 spares right next to the chamber for quick grab and drop in