CMMG Mk4 AR-15, LR-308 Buffer Tube Lock Ring

Gun Parts Cmmg UPC 815835017426

$8.79

at Palmetto State Armory

Price last checked Aug 17, 2026

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10 retailers · $17.99 to $20.60 shipped

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Lowest price across retailers each day.

Lowest seen: $8.46
Typical price: $8.75
Tracked since: Apr 10, 2026

Today's best price is $0.33 above the 212-day low and about typical.

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