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CMMG
Overview
The CMMG Mk4 Banshee Upper Receiver Group is a complete assembly designed for AR-15 platforms, featuring an 8-inch barrel that offers a compact configuration ideal for maneuverability. The black finish gives it a sleek look while ensuring durability in various conditions. This upper receiver group is commonly found in short-barreled builds focused on quick handling and agility.
Specifications
CMMG MK4 Banshee Upper Receiver Group 4.6x30 H&K 8in Armor Black
September 2026 on GunPartPicker
CMMG MK4 Banshee Upper Receiver Group 4.6x30 H&K 8in Armor Black ranked #267 of the 615 upper receivers builders added on GunPartPicker in September 2026.
It was in stock most days in September 2026, but today none of the 3 retailers we track has it in stock right now. The best price drifted down from $699.34 to $660.23 over September 2026 without a real sale. Listed prices start at $660.23 at BattleHawk Armory for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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