▼ 20% below avg
CMMG Mk4 AR-15, LR-308 Buffer Tube Lock Ring
Lowest Listed Price
$7.41
MSRP
$8.95
Savings
17% off
Retailers Reporting In Stock
10 Stores
Updated
Sep 8, 2026
Compare Deals from 18 Retailers
Sorted by lowest price
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["Castle Nut for Buffer Tubes","Fits AR-15","Matte black finish"]
Specifications
Description
CMMG offers replacement components for the AR-15 that are made to strict military specifications. These high quality components will provide excellent fit and reliable function in your AR series rifle and are perfect for upgrading existing components or replacing worn or broken parts.
