CMMG - AR-15 MK4 RECEIVER EXTENSION NUT

Name: CMMG - AR-15 MK4 RECEIVER EXTENSION NUT
Brand: CMMG
SKU: 100044623

Gun Parts CMMG UPC 815835017426 MPN 55CA9CB

$8.79

at Palmetto State Armory

Price last checked Aug 17, 2026

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10 retailers · $17.99 to $20.60 shipped

This listing: Brownells $8.46, out of stock

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Price history

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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