K-Spec 5.56x45mm NATO Complete Upper Receiver - K-Spec 5.56 NATO 16'''' Bbl 1-7 Twist Complete Upper Black
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KAK Industry
Overview
The K-Spec 5.56x45mm NATO Complete Upper Receiver is designed for AR-15 builds, featuring a 16-inch barrel with a 1:7 twist rate that stabilizes a range of bullet weights for optimal accuracy and performance. This complete upper assembly simplifies the building process, allowing builders to easily swap out their existing upper or start fresh with a reliable and precise option. This upper receiver is commonly used in various tactical and sport shooting setups.
Specifications
K-Spec 5.56x45mm NATO Complete Upper Receiver - K-Spec 5.56 NATO 16'''' Bbl 1-7 Twist Complete Upper Black
Build history on GunPartPicker
Builders on GunPartPicker first added the KAK Industry K-Spec 5.56x45mm NATO Complete Upper Receiver - K-Spec 5.56 NATO 16'''' Bbl 1-7 Twist Complete Upper Black to a build in March 2026.
It was hard to find in August 2026, in stock on only 6 of the 11 days we checked, and today the one retailer we track is out of stock. Prices barely moved in August 2026, holding around $599.99, so there haven't been real sales lately. Listed prices start at $599.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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