MRP-L M-LOK 5.56/300 BLK 13.25" Assembled Upper Receiver
$940.50 at Brownells · 3 stores
In stock
Best price
$940.50at Brownells
In stock Lowest in 30 dayschecked Nov 14, 2026
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
Compatibility
- Caliber
- 300 Blackout
- Platform
- AR-15
Dimensions and weight
- Barrel length
- 13.25"
Materials and features
- Type
- Complete
- Handguard attachment
- Quad rail
- Color
- Black
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price 17.76% off · ends Nov 15 · exclusions apply | $940.50checked Nov 14, 2026 | In stock | Buy at Brownells | |
| AR15Discounts 5% off | $849.00checked Nov 14, 2026 | Check store | Buy at AR15Discounts | |
| Dirty Bird | $849.00checked Nov 14, 2026 | Check store | Buy at Dirty Bird | |
| Palmetto State Armory | $912.60checked Oct 12, 2026 | Check store | Buy at Palmetto State Armory | |
| Battlehawk Armory | $940.50checked Nov 14, 2026 | Check store | Buy at Battlehawk Armory | |
| GrabAGun | $1,109.99checked Nov 14, 2026 | Check store | Buy at GrabAGun | |
| Kentucky Gun Co | $758.99checked Nov 14, 2026 | Out of stock | Buy at Kentucky Gun Co |
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
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 |
|---|---|---|---|
| AR15Discounts | $849.00 | $849.00 | $849.00 |
| Battlehawk Armory | $940.50 | $940.50 | $940.50 |
| Brownells | $940.50 | $940.50 | $940.50 |
| Dirty Bird | $849.00 | $849.00 | $849.00 |
| GrabAGun | $1,109.99 | $1,109.99 | $1,109.99 |
| Kentucky Gun Co | $758.99 | $758.99 | $765.52 |
| Palmetto State Armory | — | $912.60 | $912.60 |
Since Sep 27, 2026.
About this part
The MRP-L Quad 5.56/300 BLK 13.25" Assembled Upper Receiver is an AR-15 complete upper receiver from LMT Defense. It's sold by 7 stores (1 in stock), from $758.99 to $1,109.99. The lowest in-stock price in the last 30 days was $940.50 at Brownells.
From the manufacturer
MRP-L QUAD 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 QUAD 9.25 is the carbine length receiver designed for 10.5a ^2 barrels up to 18a ^2 barrels with quad rail at the 3, 6, and 9 o' Mfg: Lmt Defense
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