MRP-L M-LOK 5.56/300 BLK 13.25" Assembled Upper Receiver

Name: MRP-L M-LOK 5.56/300 BLK 13.25" Assembled Upper Receiver
Brand: LMT Defense
Availability: InStock

LMT Defense · Upper Receiver

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MRP-L M-LOK 5.56/300 BLK 13.25" Assembled Upper Receiver

Best price

$940.50at Brownells

In stock Lowest in 30 dayschecked Nov 13, 2026

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Fits and works with

Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Barrel length: 13.25" · Handguards

Specifications

Manufacturer: LMT Defense
Color: Black
Type: Complete
Platform: AR-15
Caliber: 300 Blackout
Barrel length: 13.25"

Where to buy

Store	Price	Availability	Buy
Brownells Best price 17.76% off · ends Nov 15 · exclusions apply	$940.50checked Nov 13, 2026	In stock	Buy at Brownells
Battlehawk Armory	$940.50Salechecked Nov 13, 2026	Check store	Buy at Battlehawk Armory
Palmetto State Armory	$940.99Salechecked Oct 12, 2026	Check store	Buy at Palmetto State Armory

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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Lowest in-stock price in the last 30 days: $940.50 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Battlehawk Armory	$940.50	$940.50	$940.50
Brownells	$940.50	$940.50	$940.50
Palmetto State Armory	—	$940.99	$940.99

Since Sep 27, 2026.

About this part

The MRP-L M-LOK 5.56/300 BLK 13.25" Assembled Upper Receiver is an AR-15 complete upper receiver from LMT Defense. It's sold by 3 stores (1 in stock), from $940.50 to $940.99. The lowest in-stock price in the last 30 days was $940.50 at Brownells.

From the manufacturer

MRP-L M-LOK 5.56MM ASSEMBLED UPPER RECEIVER The patented LMT Monolithic Rail Platform, MRP(TM) upper receiver. The receiver and handguard are made from a single piece of forged aerospace aluminum. The barrel is held in place with a proprietary locking system that utilizes two locking bolts accessible from the right side of the receiver. The only tool needed is a standard T-30 Torx bit to tighten the bolts. This receiver requires the patented LMT monolithic barrel assembly which has a low profile gas block with straight gas tube. The MRP-L MLOK 9.25 is the carbine length receiver designed for 10.5a ^2 barrels up to 18a ^2 barrels with M-LOK compatible attachment points o Mfg: Lmt Defense