MDT M-LOK Spare Round Holder, Black Polymer, 2-Round

The MDT M-LOK Spare Round Holder provides a compact way to carry two additional rounds on the side of a rifle. It uses interchangeable small and large polymer bodies with an adjustable spacer system to accommodate a broad range of cartridge dimensions. The spacer system employs Mil-Spec washers and O-rings to achieve a secure fit. The unit mounts to standard M-LOK slots or to accessory holes on compatible chassis and can be installed on either the left or right side.

Key Specifications

• The holder stores 2 rounds on the side of a rifle.
• The shell count/capacity is 2.
• The construction uses polymer components for the main body.
• The finish/color is black.
• Mounting is via M-LOK slots or compatible accessory holes on chassis.
• The kit includes small and large caliber bodies with an adjustable spacer system.
• The spacer system uses Mil-Spec washers and O-rings to tune fit.
• The design is reversible for left- or right-side mounting.
• Advertised multi-caliber compatibility includes .223, 300 AAC, .224 Valkyrie, 7.62×39, 6.5 Grendel, .308, 6.5 Creedmoor, 450 Bushmaster, 7mm, 300 WM, 300 PRC, and 6.5 PRC.
• The model/fitment identifier is listed as M-LOK.

Low-profile and purpose-built, this spare round holder keeps a pair of rounds accessible without significantly altering rifle balance or ergonomics. Its adjustable spacer elements and reversible mounting make it suitable for use in competitive shooting, range sessions, and field applications where compact, reliable spare-round storage is desired.