KAK K-SPEC 5.56mm NATO Complete Upper Receiver

Description

Product Overview

The KAK K-SPEC 5.56mm NATO complete upper receiver is an AR-15 compatible, chrome-lined setup built for dependable function. It pairs a 14.5in 4150 CrMoV chrome-lined barrel with a mid-length gas system and a 1:7 twist, then adds a free-float 13in MLOK handguard for stable handling. For the bolt carrier group, this build uses a chrome-lined phosphate K-SPEC Enhanced BCG with a down-vent design and dual ejectors to help manage gas direction during suppressed or normal firing.

Key Features

• 14.5in 4150 CrMoV chrome-lined barrel with 1:7 twist and mid-length gas system
• Forged 7075 T6 upper receiver for a strong, rigid foundation
• Chrome-lined phosphate K-SPEC Enhanced BCG with down-vent configuration, dual ejectors, and slotted angled carrier rails
• 13in free-float MLOK handguard with heavy-duty barrel nut for secure mounting and stability
• 1/2x28 muzzle threads with Brownells-exclusive PentaComp muzzle device
• Large billet latch enhanced charging handle for positive operation

Test-fired to confirm reliable function, this complete upper is built for straightforward, long-term use.