AR-15 MK1 Mod 1-M Upper Receiver Assembly 223 Wylde M-LOK - MK111 Mod 1-M 223 Wylde Upper Receiver W/11.85" Bbl
All Primary Weapon Systems upper receivers
Click to see full view
Primary Weapon Systems
Overview
The AR-15 Mk1 Mod 1-M Upper Receiver Assembly is a complete upper designed for the AR-15 platform, featuring an 11.85-inch barrel chambered in .223 Wylde. This caliber allows for versatility in ammunition selection, accommodating both .223 Remington and 5.56 NATO rounds while optimizing performance and accuracy. Ideal for compact builds, this upper is particularly suited for those looking to create a lightweight, maneuverable setup for close-quarters engagements or tactical applications.
Specifications
AR-15 MK1 Mod 1-M Upper Receiver Assembly 223 Wylde M-LOK - MK111 Mod 1-M 223 Wylde Upper Receiver W/11.85" Bbl
Available Merchants(6)
Prices checked
Price Alert
October 2026 on GunPartPicker
Primary Weapon Systems AR-15 MK1 Mod 1-M Upper Receiver Assembly 223 Wylde M-LOK - MK111 Mod 1-M 223 Wylde Upper Receiver W/11.85" Bbl ranked #232 of the 844 upper receivers builders added on GunPartPicker in October 2026.
It was in stock most times we checked in October 2026, but today 2 of the 6 retailers we track have it in stock. Buying today, the lowest price is $1,129.95 at Brownells, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
Not sure which upper receiver to pick?
We ranked every upper receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: Most Popular AR-15 Upper Receivers →Check it against the live catalog:
Frequently Built With
Popular alongside upper receivers on GunPartPicker
Smith & Wesson M&P15 Complete Lower 5.56x45mm/.223 Remington, Black - 812002
Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green
Bravo Company M16 Bolt Carrier Group Black
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Magpul AFG-2 Angled Fore Grip - Black
Magpul AR-15 MOE Stock Collapsible Mil-Spec Black
No reviews yet. Be the first to review this product!