In Stock
Type
parts
Last Seen
May 19, 2026
CMMG 55CA9CB Receiver Extension Castle Nut Black Matte MK4
Sold byHinterland Outfitters•Posted Apr 27, 2026
Compare prices for CMMG Mk4 AR-15, LR-308 Buffer Tube Lock Ring$10.59
Price and stock data refresh continuously from Hinterland Outfitters.
Deal Summary
- Currently in stock.
- Category: parts
- UPC: 815835017426
- SKU: 216314
- Brand: Cmmg
Price History
Deal Details
CMMG 55CA9CB Receiver Extension Castle Nut Black Matte MK4
Other Offers for This Product
Active offers from your catalog for CMMG Mk4 AR-15, LR-308 Buffer Tube Lock Ring.
Comparing 7 retailers carrying this product
Lowest Price: $6.99
Highest Price: $17.49
You Save: $10.50
Avg Discount: 11% off
CMMG Receiver Extension Nut, Mk4 - 55CA9CB
CmmgPalmetto State ArmorySKU/UPC: 516551631247
$8.79$9.99Save 12%
View at Palmetto State Armory
CMMG Inc Nut Receiver Extension MK4
CmmgOptics PlanetSKU/UPC: 2CM-RBT-55CA9CB
$8.99$17.99Save 50%
View at Optics PlanetCMMG 55CA9CB Receiver Extension Castle Nut Black Matte MK4
CmmgHinterland OutfittersSKU/UPC: 216314
$10.59
View at Hinterland Outfitters
CMMG Receiver Extension Nut for the Mk4
CmmgGrabAGunSKU/UPC: GAG_RES-CMMG55CA9CB
$12.89
View at GrabAGun
CMMG Matte Black MK4 Receiver Extension Castle Nut
CmmgAmmunition DepotSKU/UPC: 55CA9CB
$17.49
View at Ammunition Depot