In Stock
Type
parts
Last Seen
May 19, 2026
CMMG Matte Black MK4 Receiver Extension Castle Nut
Sold byAmmunition Depot•Posted Apr 27, 2026
Compare prices for CMMG Mk4 AR-15, LR-308 Buffer Tube Lock Ring$17.49
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Deal Summary
- Currently in stock.
- Category: parts
Price History
Deal Details
Transform your AR pistol with the CMMG Matte Black MK4 Receiver Extension Castle Nut designed for seamless conversion to a smooth-sided pistol tube. This assembly includes a sleek matte-finished pistol buffer tube and an ambidextrous sling receiver end plate allowing for enhanced versatility and comfort. Ideal for those seeking a streamlined look without compromising on quality this kit is perfect for upgrading your firearm while reusing your existing buffer spring and castle nut. Experience
UPC Price Comparison
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