M-LOK Mk111 Mod 1-M Upper Receiver 11.85 Barrel .223 Wylde

Name: M-LOK Mk111 Mod 1-M Upper Receiver 11.85 Barrel .223 Wylde
Brand: Primary Weapons Systems
Availability: OutOfStock

Primary Weapons Systems · Upper Receiver

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Best price

$964.99at Brownells

Out of stock checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$964.99checked Oct 1, 2026	Out of stock	Buy at Brownells

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

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Dashed line = out of stock. Tracking since Sep 28, 2026.

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Store	Latest	Lowest	Highest
Brownells	$964.99	$964.99	$964.99

Since Sep 28, 2026.

About this part

The M-LOK Mk111 Mod 1-M Upper Receiver 11.85 Barrel .223 Wylde is a 5.56 / .223 upper receiver from Primary Weapons Systems. One store lists it, Brownells at $964.99.

Fits and works with

Caliber: 5.56 / .223 · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups

Specifications

Manufacturer: Primary Weapons Systems
Platform: AR-15
Caliber: .223 Wylde

From the manufacturer

The MK111 MOD 1-M is perfect for shooters looking for a weapon with endless uses. Maintaining the shortest barrel length recommended for suppressed use, this compact upper receiver is one of the most popular from LE to heli-hunting. The MK111 upper receiver has an 11.85" barrel and a Triad556 Compensator. The MK116 MOD 1-M upper receiver comes from one of the most popular firearms PWS manufactures. Being a go-to for Law Enforcement communities looking for non-NFA items, this rifle can be seen in-use by over 85 LE communities in the United States. The MK116 upper receiver has a 16.1" barrel with a FCS 556 Compensator. Long stroke piston system M-LOK handguards Mfg: Primary Weapons