MRP-L QUAD 5.56MM ASSEMBLED UPPER RECEIVER – MRP-L QUAD 5.56/300 BLK 9.25” ASSEMBLED UPPER RECEIVER

Specifications

  • Cartridge: 300 AAC Blackout
  • Style: Assembled
  • Length: 9.25''
  • Model: Mars-L
  • Finish: Anodized
  • Color: Black
  • Make: LMT
  • Make/Model: LMT, Mars-L

MRP-L QUAD 5.56MM ASSEMBLED UPPER RECEIVER

The patented LMT Monolithic Rail Platform, MRP™ 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 10.5″ barrels up to 18″ barrels with quad rail at the 3, 6, and 9 o’clock positions. This receiver sports 5 QD sling swivel attachment locations. Barrel not included.

The MRP-L QUAD 13.25 is the rifle length receiver designed for 14.5″ barrels up to 20″ barrels with quad rail at the 3, 6, and 9 o’clock positions. This receiver sports 5 QD sling swivel attachment locations. Barrel not included.

SPECIFICATIONS:

  • Weight: 1.424 lbs – 1.742 lbs
  • Dimensions: 16.25 in – 20.25 in
  • Caliber: .204 Ru, .300 BLK, 5.56×45, 6.8 SPC
  • MRP Platform: MRP-L (Light)
Description

Original price was: $890.10.Current price is: $639.42.

MRP-L QUAD 5.56MM ASSEMBLED UPPER RECEIVER

The patented LMT Monolithic Rail Platform, MRP™ 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 10.5″ barrels up to 18″ barrels with quad rail at the 3, 6, and 9 o’clock positions. This receiver sports 5 QD sling swivel attachment locations. Barrel not included.

The MRP-L QUAD 13.25 is the rifle length receiver designed for 14.5″ barrels up to 20″ barrels with quad rail at the 3, 6, and 9 o’clock positions. This receiver sports 5 QD sling swivel attachment locations. Barrel not included.

SPECIFICATIONS:

  • Weight: 1.424 lbs – 1.742 lbs
  • Dimensions: 16.25 in – 20.25 in
  • Caliber: .204 Ru, .300 BLK, 5.56×45, 6.8 SPC
  • MRP Platform: MRP-L (Light)

Out of stock

SKU 430111515 Category

Description

MRP-L QUAD 5.56MM ASSEMBLED UPPER RECEIVER

The patented LMT Monolithic Rail Platform, MRP™ 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 10.5″ barrels up to 18″ barrels with quad rail at the 3, 6, and 9 o’clock positions. This receiver sports 5 QD sling swivel attachment locations. Barrel not included.

The MRP-L QUAD 13.25 is the rifle length receiver designed for 14.5″ barrels up to 20″ barrels with quad rail at the 3, 6, and 9 o’clock positions. This receiver sports 5 QD sling swivel attachment locations. Barrel not included.

SPECIFICATIONS:

  • Weight: 1.424 lbs – 1.742 lbs
  • Dimensions: 16.25 in – 20.25 in
  • Caliber: .204 Ru, .300 BLK, 5.56×45, 6.8 SPC
  • MRP Platform: MRP-L (Light)

Additional information

Weight 1.43 lbs
Style

Assembled

Length

9.25''

Cartridge

CCP_300 AAC Blackout, AKK_5.56 x 45

Model

Mars-L

Finish

Anodized

Color

Black

Make

LMT

Make/Model

LMT, Mars-L

Frequently Asked Questions

Are these brass cases and reloading components factory-new or once-fired? +

We stock both premium factory-new components and high-quality once-fired brass. Please check the specific product listing title and description carefully; once-fired brass is fully inspected, but we always recommend resizing and inspecting prior to priming and powder charging.

Will this case trimmer gauge or die set work with my progressive press setup? +

Our standard reloading dies and case length trimmer accessories utilize industry-standard threads (typically 7/8"-14) compatible with major single-stage, turret, and progressive presses like RCBS, Hornady, Lee Precision, and Dillon. Caliber-specific trim gauges must match your exact brass caliber.

Do you enforce shipping restrictions on powder, primers, or live ammunition? +

Yes. Non-hazardous reloading equipment (dies, case length trimmers, gauges, and unprimed brass) ships via standard ground carriers with no extra fees. Any orders containing smokeless powders or primers will incur standard federal HazMat handling fees and cannot be shipped via air transportation.

How can I track my shipment to ensure delivery safety? +

Precision reloading gear is valuable, so all orders are shipped with tracking enabled. As soon as your package is dispatched from our inventory warehouse, a tracking number will be emailed to you. You can monitor your shipment directly on our Track Order page using your unique Order ID.

Can I return precision measuring tools or die components if they don’t fit? +

We accept returns on unused, unaltered tools, case preparation equipment, and unopened component boxes within 30 days of item delivery. Due to safety and strict quality control on the reloading bench, we absolutely cannot accept returns on opened packs of primers, smokeless powder, or processed brass casings.