Primary Weapons Systems MK1 MOD 1-M .223 Wylde 1:8 Twist Complete Upper Receiver

Name: Primary Weapons Systems MK1 MOD 1-M .223 Wylde 1:8 Twist Complete Upper Receiver
Brand: Primary Weapon Systems
SKU: 18-M107UA0B
Price: 1029.49 USD
Availability: OutOfStock

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Primary Weapon Systems Primary Weapons Systems MK1 MOD 1-M .223 Wylde 1:8 Twist Complete Upper Receiver - Upper Receiver for AR-15 - view 1

Primary Weapon Systems Primary Weapons Systems MK1 MOD 1-M .223 Wylde 1:8 Twist Complete Upper Receiver - Upper Receiver for AR-15 - view 2

Primary Weapon Systems Primary Weapons Systems MK1 MOD 1-M .223 Wylde 1:8 Twist Complete Upper Receiver - Upper Receiver for AR-15 - view 3

Primary Weapon Systems Primary Weapons Systems MK1 MOD 1-M .223 Wylde 1:8 Twist Complete Upper Receiver - Upper Receiver for AR-15

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Primary Weapon Systems

Overview

The Primary Weapons Systems MK1 MOD 1-M is a complete upper receiver designed specifically for the AR-15 platform, chambered in 5.56 NATO. With a 1:8 twist rate, this upper is optimized for stabilizing a wide range of bullet weights, making it versatile for various shooting applications. This upper receiver is commonly found in builds focused on both precision shooting and tactical versatility.

Specifications

MPN18-M107UA0B

AssemblyComplete

Twist Rate1:8

Caliber5.56 NATO

PlatformAR-15

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Primary Weapons Systems MK1 MOD 1-M .223 Wylde 1:8 Twist Complete Upper Receiver

Available Merchants(1)

Prices checked Oct 12, 2026

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BattleHawk Armory

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$1,029

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Price and stock

The Primary Weapons Systems MK1 MOD 1-M .223 Wylde 1:8 Twist Complete Upper Receiver 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 $1,029.49 at BattleHawk Armory for when it comes back.

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Prices checked Oct 12, 2026 · refreshed daily across 37 retailers