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
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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 out of stock everywhere we track for all of September 2026, and today the one retailer we track is out of stock. Listed prices start at $599.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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