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Mfg Item #: 7833021
Lyman MSR Ammo Checkers are machined from solid blocks of 6061 T6 aircraft grade aluminum and cut with custom tooling to minimum chamber dimensions. Their black anodized finish matches your favorite black rifle. Check the quality and consistency of both loaded rounds and purchased ammo. A must for any AR shooter. You cant afford mis-feeds so get the easiest Go gauge available for modern sporting rifle calibers. - Covers 223/5.56 6.5 Grendel 6.8 Rem. SPC 7.62x39 300AAC Blackout 450 Bushmaster 458 SOCOM and 50 Beowulf - CNC machined to minimum chamber specs - Confirm ammo will chamber smoothly