Shop › CMMG HANDGUARD SLIP RING KIT CMMG HANDGUARD SLIP RING KIT $13.99 CMMG Hand Guard Slip Ring Kit, Includes Slip Ring, Spring, and Retaining Ring, Black 55DA2CF Quantity: Add To Cart Added! CMMG Hand Guard Slip Ring Kit, Includes Slip Ring, Spring, and Retaining Ring, Black 55DA2CF