MDT Sporting Goods M-LOK Multi-Caliber Spare Round Holder Black Polymer

The MDT M-LOK Multi-Caliber Spare Round Holder is a compact, purpose-built spare ammunition carrier designed to keep two quick-access rounds staged on the side of a rifle chassis or handguard. Constructed from durable black polymer, this holder clamps directly to any M-LOK slot, giving precision rifle shooters and tactical rifle users a streamlined way to carry backup rounds without adding bulk to a chest rig or belt.

The holder is engineered for wide caliber compatibility, accepting a broad range of common rifle cartridges including .223 Rem, .300 Blackout, .224 Valkyrie, 7.62x39, 6.5 Grendel, .308 Win, 6.5 Creedmoor, .243 Win, .260 Rem, and 7mm-08 Rem. An adjustable spacer system using Mil-Spec washers and O-rings allows the user to tune retention for each cartridge, keeping rounds secure yet easy to deploy for faster follow-up shots. The reversible mount design lets the shooter choose which side of the rifle the holder sits on.

Designed primarily for AR-15, AR-10, and LR-308 style rifles equipped with M-LOK handguards or chassis systems, this holder integrates cleanly with the rest of an MDT-built precision rig. It is a simple, lightweight solution for competitors, hunters, and duty rifle users who want immediate access to two extra rounds in the field.