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Home » Firearms » Tactical Rifles » CQB1668
Hinterland Item #36593

LMT CQB MRP Defender 6.8 SPC Rifle CQB1668, 6.8 SPC, Semi-Auto, 16 in Chrome Lined BBL 1X10 Twist, Collapsible Sopmod Stock, Blk Finish, 25+1 Rds, Estimated Lead Time 4-8 Weeks

Manufacturer #CQB1668

Current Reviews: 0    (Write a review & get a $5 coupon)

Our Price: $2,049.00

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Please contact us to place a special order for this item, or with questions about availability and lead times.

Restricted Product

Guns can only be shipped to a location within the USA that holds an FFL (Federal Firearms License) - this can be your local gun shop, pawn shop, sporting goods store, etc. Your local gun dealer will then handle the transfer of the firearm to you.

Please ensure that you have familiarized yourself with the process before placing a firearm order. Please note that you must confirm your acceptance of all of these policies to place a firearm order:

Product Description

The LMT CQB MRP Defender 6.8 SPC Model CQB1668 rifle system comes with a optional 16 inch chrome lined barrel with a 1X7 twist. The LMT Defender 6.8 comes in a 6.8 SPC. The CQB MRP also comes in eight optional barrels in a 14.5, 16, 18, and 20 inch configuration. Ships with a sling, operators manual, tactical adjustable rear sight, tactical front sight, (1) twenty five round magazine, (2) heavy duty push button swivels (included as of 2011 orders), torque wrench/driver and (3) rail panels. California Legal versions available. Please call us toll-free at 1-877-446-8370 to learn about optional upgrades, optional features and current pricing.

LMT rifles are custom built and may take up to 4-6 weeks to complete depending on current demand. Many are ready for immediate delivery. All sales are final on custom firearms. Please call 1-877-446-8370 or email for more information on ordering, optional upgrades, and delivery times.

LMT Rifles

The LMT's 5.56 complete weapon systems are the go-to weapons for proven reliability. LMT selects only the finest independently-verified raw materials with which to manufacture our components, ensuring each operator that their weapon will function reliably, time after time after time. LMT barrels are cryogenically treated for increase accuracy potential, and have withstood a 70,000 psi Proof Round followed by a magnetic-particle-inspection without incident, failure or flaw. It's this attention to detail that leads to combat-reliable weapons and more accurate shots on target. All complete weapons and upper assemblies are 100% US made and comply with the Berr Amendment.

The MRP Defender 6.8 upper receiver is a 16' chrome lined 1:10' twist 6.8 SPC barrel, standard semi auto bolt carrier with 6.8 enhanced bolt assembly, tactical charging handle assembly, Defender lower with SOPMOD buttstock and standard trigger group.

Optional Barrels:

L7NA1B-14.5" Chrome-lined 1X7 Twist 5.56 MRP Barrel

L7PA1B-16" Chrome-lined 1X7 Twist 5.56 MRP Barrel

L7S1B-18" Stainless Steel 1X7 Twist 5.56 MRP Barrel

L7SB1B-16" Stainless Steel 1X7 Twist 5.56 MRP Barrel

L7CA1B-20" Stainless Steel 1X12 Twist .204 Ruger MRP Barrel

L7EA1B-16" Crome-lined 1X10 Twist 6.8 MRP Barrel

L7GA1B-18" Stainless Steel 1X10 Twist 6.8 MRP Barrel


  • Direct Gas Impingement
  • Overall length with SOPMOD collapsed: 33"
  • Overall length with SOPMOD extended: 36"
  • A2 birdcage compensator
  • 5/8 X 24 thread pitch
  • Low Profile Gas Block
  • Cryogenically treated barrel to increase accuracy, barrel life and easier cleaning
  • Electronically tested and recorded trigger pull

Lewis Machine & Tool Company (LMT) was founded in 1980 to provide the US military, law enforcement and government agencies with high quality weapons, components, and modular weapon systems. Since the beginning, the LMT™ mission has been to meet their customer's expectations of quality, price and delivery of precision machined parts, weapon systems, assemblies and engineering services. In their thirty years of doing business in Milan, Illinois, LMT has always been environmentally responsible, as well as working to become an asset of their community while providing their employees with a rewarding and challenging work place.

LMT continues to serve the US military, law enforcement and government agencies, and has expanded to include foreign military services as well as commercial retailers. LMT's engineers design and fabricate complete weapon systems, grenade launchers, and Monolithic Rail Platform (MRP™) systems specifically for the demanding environments that the military and law enforcement face on a day-to-day basis whether in urban environments or in desert combat situations. LMT produces a full line of accessories and components for the commercial market complementing any M16 or AR15 type weapon.

In response to the growing demand for quick-change barrel systems, Karl Lewis, President of LMT, designed the Monolithic Rail Platform. The MRP™ upper receiver is a one-piece lightweight upper receiver with an integral forend. Mil-Std 1913 rails run from front to the forend on each of the four sides. The MRP™ receiver comes in two different lengths, one traditional rifle and the other for Close Quarter Battle (CQB). With four rails, the MRP™ system offers plenty of places for accessories such as optics and lights.

Lewis Machine & Tool Company recently qualified as a 2005 GSA supplier. As a US Government Services Administration (GSA) qualified vendor, LMT™ products are available to over 300,000 Federal users worldwide.

Lewis Machine & Tool Company has also been recognized on several levels for their adherence to quality engineering and excellence in business. LMT is the recipient of the Illinois Quad City Small Business Government Procurement Award for Excellence in State and Federal Government Procurement. Other awards include the United States Army Armament, Munitions and Chemical Command Award for Contractor Excellence of Loyal Support and Contributions to the Readiness of the US Armed Forces for the period of October 1, 1991 through September 30, 1992 and the US Army Material Command for Outstanding Achievement in Value Engineering in 1994 and the Committee of Small Arms Producers (CSAP) for the period of April 1997 through February 2001.

Please Note: This description may represent a general group of products. Please read the item's title and specifications for more specific information about this particular item.

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Product Reviews

Reviews of LMT CQB MRP Defender 6.8 SPC Rifle CQB1668, 6.8 SPC, Semi-Auto, 16 in Chrome Lined BBL 1X10 Twist, Collapsible Sopmod Stock, Blk Finish, 25+1 Rds, Estimated Lead Time 4-8 Weeks

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