• Adams Arms **

  • AK-47 Parts and Accessories

  • Apex Machining Handguard

  • Apparel & Gift Certificates

  • AR10 & Variants Parts

  • AR15 Parts

  • Back Up Iron Sights BUIS

  • Battle Arms

  • Biometric Locks and Safes

  • Bipods - Quick Detach - Heavy Duty

  • CAA Command Arms Accessories EMA

  • cmmg

  • Complete AR-15 Upper Assemblies

  • Daniel Defense Inc.

  • Geissele SHIPS FREE

  • Eotech Holographic Sights **

  • FAB Defense & Mako Tactical

  • Flash Hider - Muzzle Brake

  • Flashlights & Lasers

  • GG&G Tactical Products

  • Guntec USA

  • Handguards - AR-15 Forearm - Quad Rail

  • KNS Precision


  • Magazines

  • Magpul Industries

  • Matrix Arms

  • MI Midwest Industries **

  • Mission First Tactical MFT


  • Optics - Holographic - Scopes

  • Pistol Grips Modular AR15 AR10 M16

  • Primary Weapons Systems **

  • RRA Rock River Arms

  • Samson Manufacturing **

  • Seekins Precision**

  • Shotguns

  • Sightmark

  • Slings and Accessories

  • Spike's Tactical

  • Stocks - AR15 M4 AR10 G3 FAL Buttstocks

  • Streamlight

  • Strike Industries

  • Triggers

  • Troy Industries

  • UTG Ultimate Tactical Gear

  • Vertical Forward Grips AR15

  • VLTOR Weapons Systems

  • YHM Yankee Hill Machine Company

  • View All Products ->

    All Products sorted by Categories ->

    All Products sorted by Manufacturers ->
    Specials more
    Magpul CTR Mil-Spec Stock MAG-310 for AR-15 M4 M16 MAG310 - Black
    Magpul CTR Mil-Spec Stock MAG-310 for AR-15 M4 M16 MAG310 - Black
     $79.95  $70.95 
    Manufacturers Info
    LMT Lewis Machine & Tool
    LMT Lewis Machine & Tool Homepage
    Other products LMT Lewis Machine & Tool
    Who's Online
    There currently are 32 guests and 
    1 member online.
    LMT Lewis Machine & Tool 16" Upper Assembly 1:7 5.56 .223 [L7UB1]  $573.46  $534.95 

    LMT Lewis Machine & Tool 16" Upper Receiver Assembly 1:7 5.56/.223 with A2 Flash Hider


    One of the Most Respected Names in M16 / M4 / AR-15's delivered to your door. NO FFL REQUIRED.


    Looking for a high quality & dependable AR15 UPPER to be the foundation of your new build?  The LMT 16" upper is the "Best Bang for the Buck" affordable solution!

    The upper is built off of the LMT standard forged A4 receiver with M4 feed ramps.  The barrel is mil-spec machine gun grade chrome-moly vanadium material, M4 profile, light government contour, 5.56mm chamber and bore, 1/7 twist ratio and 1/2x28 threaded barrel and chrome lined for corrosion and wear resistance.  All barrels are magnetic particle tested, Cryogenically treated for enhanced accuracy, easier cleaning and longer life, and put to the test with 50% overload Proof round without incident failure or flaw "because failure is not an option".  Utilizing fully implemented Quality Assurance methods and procedures to ensure the highest quality and reliability of products. LMT is ISO 9001:2000 Certified and MADE IN USA.

    LMT Barrel Specifications

        * Mil-spec certified 4150 chrome-moly vanadium steel barrel
        * Cryogenically treated for enhanced accuracy, easier cleaning and longer barrel life
        * Chrome Lined for corrosion resistance
        * M4 feed ramps/Barrel Extension
        * 1/7 twist to stabilize higher bullet weight & 11 degree recessed target crown
        * 1/2x28 Threaded Muzzle
        * Parkerized Barrel, including under the front sight base
        * M4 contour

    Each barrel is individually magnetic particle tested. Barrels are engraved MP 5.56 NATO 1/7.



    Why choose LMT?

    Lewis Machine & Tool Company (LMT) was founded in 1980 to provide the US military, law enforcement and government agencies with high quality weapons and components. Their quality has become recognized domestically and internationally and earned the distinction of being a General Services Administration (GSA) Supplier.  They have been awarded numerous special forces, law enforcement, and military contracts for their rifle's competitive stress test wins and have achieved the highest level of factory quality with ISO 9001:2000 certification.  

    What is Magnetic Particle Inspection (MPI) and High Pressure Testing (HPT)?

    The barrels are HPT (High Pressure Testing) tested which is a process wherein a proof load rated at 70,000 psi (far exceeding the pressure of a normal round) is fired trough the barrel. The barrel is then tested with a non-destructive process called MPI (Magnetic Particle Inspection).  MPI is a process that utilizes magnetic powder to detect any flaws in the barrel extension and barrel from the proof load.  Many manufacturers only MPI a couple rifles a batch.  EVERY LMT barrel is MP tested and engraved as such.


    What is Included?

    1. LMT Barreled and headspaced forged M4 upper
    2. A2 bird cage flash hider
    3. Fixed A2 Front Sight gas block with bayonet lug
    4. Front sight post assembly installed
    5. Front sling swivel installed
    NOT INCLUDED: Handguard, Bolt Carrier Group, Rear Sight, Charging Handle

    OPTIONAL UPGRADE TO LMT TACTICAL CHARGING HANDLE:LMT's new Tactical Charging handle features our newly designed tactical latch for easier manipulation of the charging handle. Improved ergonomics. ** For use on 5.56 or 6.8 system only ** 

    Can you put .223 Remington ammo in a 5.56 upper?

    Yes, you can put .223 into a 5.56 chambered upper, but NOT the other way around due to pressure related issues with slight variations in the chamber (5.56 are slightly longer). Do NOT purchase a rifle chambered in .223 if you EVER plan on shooting any military NATO 5.56 ammo, which is the most common, least expensive and most widely used AR15 cartridge available in all the world.  The problem is NATO cartridges have bullets that will become jammed into the rifling of a SAAMI .223 chambering (the throat is too short). This is VERY DANGEROUS, for a lot of reasons.  For best accuracy, 5.56 is recommended but .223 will shoot fine and safely.

    Available Options:
    Add Charging Handle :
    Kit Options:
    This product was added to our catalog on Friday 19 March, 2010.
    Reviews Add to Wish List
    Customers who bought this product also purchased
    McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams

    Quick Find
    Use keywords to find the product you are looking for.
    Advanced Search
    Your Account
    Your Email Address
    Your Password
    Featured more
    Dead Foot Arms MCS Modified Cycle AR15 Pistol or Side Folder Rif
    Dead Foot Arms MCS Modified Cycle AR15 Pistol or Side Folder Rif
    Reviews more
    Write ReviewWrite a review on this product!
    New Articles (0)
    All Articles (15)
    AR-15 Common Questions (15)
    Terms and Conditions
    Shipping and returns
    Is Inventory LIVE?
    What is PlugNpay?
    Is heartbleed safe?
    Gift Voucher FAQ
    Contact us
    Positive SSL on a transparent background
    VTSupply is PCI Compliant
    Follow VTSupply on Twitter
    Support GOA
    Take Action or Lose
    Support 22kill
    Support NRA

    McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams