CMMG 57B18AF Banshee 300 MK4 Upper 5.7x28mm Black
CMMG
Overview
The CMMG 57B18AF Banshee 300 MK4 Upper 5.7x28mm Black is a upper receiver. Compare prices from multiple merchants and find the best deal.
Specifications
Price and stock
The CMMG 57B18AF Banshee 300 MK4 Upper 5.7x28mm Black was out of stock everywhere we track for all of August 2026, and today the one retailer we track is out of stock. Listed prices start at $618.03 at BattleHawk Armory for when it comes back.
Prices checked · refreshed daily across 35 retailers
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