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  1. #1
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    The Mother of all Rail Articles

    My contract with Military Times prevents me from copying the information from one site to the other. Hit the link below for more information, pictures, and the writeup. The condensed version can be found below.

    I get a few email/ IM/ PM a week regarding rails. Free float vs non, long rails, cheap rails, cut out FSB, anti-rotation, etc etc.. Instead of writing out a short version each time, I decided to write something out that is a bit more lengthy.

    Please don't look to this article to give you names, or tell you what you have to go buy. Its a list of question you may or may not have thought of, and hopefully the answers presented will hep you out.

    Its a long article, but it should help some people out.

    http://gearscout.militarytimes.com/2...rail-articles/


  2. #2
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    Noveske NSR Rail



    In collaboration with VLTOR, Noveske introduced the world to Keymod. The NSR handguard was designed with the goal of being the lightest and smallest free floating forend option to the M16 family of weapons. The width of the NSR handguard before accessories have been installed is only 1.48" The NSR handguard is available for sale as standard equipment on our rifles and upper assemblies, as well as a separate component for sale to the public. Available in 7", 9", 11", 13.5", 15" and 16.7" lengths.

    The KeyMod inter-locking rail system is a collaboration between Vltor Weapon Systems and Noveske Rifleworks. Separately, both companies were in development of their own systems, but later realizing that both systems were similar, a standardization of the KeyMod system came to be.

    The KeyMod system offers a mounting platform for a variety of (future) accessories and components. The days of the Picatinny Rail (MIL-STD-1913) are numbered. The future of the direct mountable accessory is here and now. The KeyMod self-contained components/mounting hardware index and V-block onto the platform, achieving a secured and accurate hold to the system, while separate lugs take the recoil force off the fasteners. The pass through attachment method eliminates the need for loose screws and backing plates that can easily be lost, or difficult to install. Another advantage of the KeyMod system over the 1913 system is the direct attach eliminates the need for the 1913 system as a "middle Man" thereby reducing weight and accessory off-set from the center of the handguard.

    --Hard Coat Anodized Aluminum
    --Ultra Light and Robust Design
    --1913 Continuous Top Rail
    --Innovative Keymod Modular Direct Attachment System
    --Steel Barrel Nut

    Includes:
    --Handguard
    --Barrel Nut
    --Mounting Screws
    --T25 Wrench
    --Instructions

    Not included:
    --1 1/16" Crowfoot Wrench
    --Medium Strength Thread Locker

    INSIDE DIAMETER: 1.35"

    WEIGHTS:

    7" - 4.4 oz.

    9" - 5.6 oz.

    11" - 6.6 oz.

    13.5" - 7.9 oz.

    15" - 8.7 oz.

    16.7" - 9.4 oz.
    BARREL NUT WEIGHT:3.1 oz.

    Available in Black only

    Made in USA

    http://www.shopnoveske.com/products/noveske-nsr-rail
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  3. #3
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    Centurion Arms CMR Rail



    Description

    Our patent-pending CMR rail system is a lightweight, rugged, one piece, free float hand guard that, when installed, gives the upper a continuous 12 o’clock rail. The CMR system clamps to a proprietary barrel nut that can be installed on 5.56/.223 based AR platform systems. It was designed with the top 1913 rail for mounting the most common accessories, yet does away with the need for 1913 rail at the 3, 6, and 9 o'clock positions. Here, other accessories can be directly mounted to it with a dedicated, simple, light-weight, mount. However, it does allow for 1913 rail to be added, if needed, for some less common accessories. Additionally, we built in anti-rotation QD sling swivels in 4 positions. The main objective was to have a smaller, lighter weight, more ergonomic, hand guard that maintains or enhances functionality for the end user. As professional end users ourselves, we know the importance of keeping things simple and that was our design intent here... a K.I.S.S. (keep it simple, stupid) system.




    Features:

    Material: 6061 T6

    Finish: Type III hard coat anodized

    Integrated QD Attachment sockets - Limited Movement

    Weight :9.5in-9.4oz with barrel nut

    :11in-10.4oz with barrel nut

    :12in-10.7oz with barrel nut

    :14in-14.5oz with barrel nut

    Length :9.5in (9.418”)

    :11in (10.994”)

    :12in (12.56")

    :14in (14.25”)

    Width: 1.56(body of tube) 1.75 (at QD sling swivels)

    Height: 1.995

    Inside diameter: 1.12

    Rails: 1913 spec rail on top

    Made in USA

    http://www.centurionarms.com/category-s/1819.htm
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  4. #4
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    Bravo Company MFG KMR



    Developed by the "Father of KeyMod™", Eric Kincel, the BCM KeyMod™ Rail(KMR) delivers a robust, ultra-light modular handguard for the AR platform, second to none on the market today.

    Next Gen Materials

    Aluminum-Magnesium Blended Alloy

    Manufactured from an exclusive blended aluminum and magnesium alloy, the BCM KMR weighs 30-40% less than pure aluminum with the same strength properties. The BCM KMR also features a proprietary patent pending mounting, indexing and lock up system that mitigates 12:00 rail movement due to heat generated from the barrel nut.

    Corrosion Resistant Finish

    The KMR's propriety finish is a plasma deposition process originally developed for the Aerospace industry. The finish creates a stabilized, ceramic-like surface coating with superior wear resistance when compared to anodized or even hard chrome. The stabilized nature of the coating means it has a higher corrosion resistance as well, due to the lack of 'pores' in the surface.

    Unprecented Customization

    The KeyMod™ interface system was originally developed by Eric Kincel (now the Director of BCMs' product development team) to work in parallel with the current Picatinny rail handguard system. In many applications, the KMR will offer modularity and customization exceeding the current 1913 rail systems with baked-in rails.
    The BCM KMR also allows for a greater range of customization, offering an additional 4 offset mounting points between traditional 3,6,9, and 12:00 positions.

    The KMR is available in lengths:

    9"
    10"
    13"
    15"

    http://www.bravocompanymfg.com/kmr/
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  5. #5
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    MEGA Arms Wedge Lock Rail



    Designed in collaboration with Hodge Defense the Wedge Lock is MEGA's first stand alone rail system.

    • Cutting edge new design Ultra strong and lightweight. Simple one screw fastening system.

    • Made from 7075-T651 extruded aluminum

    • Titanium barrel nut

    • Black Nitrided wedge system

    • Compatible with any Mil-Spec upper.

    • Includes handguard and comes with wedge system, titanium barrel nut, assembly tools, one M-LOK or KeyMod rail.


    Available in lengths:

    •WLH-250 - CARBINE LENGTH HANDGUARD, , 7 Inches, BLACK HARD ANO. MSRP $249
    •WLH-350 - MID LENGTH, HANDGUARD, 9 Inches, BLACK HARD ANO. $272
    •WLH-450 - RIFLE LENGTH, HANDGUARD, 12 Inchs, BLACK HARD ANO. $295
    •WLH-550 - EXTENDED RIFLE LENGTH HANDGUARD, 14 Inches, BLACK HARD ANO. $326
    •WLH-650 - MEGA EXTENDED LENGTH HANDGUARD, 16 Inches, BLACK HARD ANO. $357

    http://megaarms.com/ar-15/wedge-lock...ery/thumbnails
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  6. #6
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    LANTAC USA SPADA-S Rail

    Lantac USA is pleased to announce the SPADA-S Handguard. The handguard features anti-rotational features on the barrel nut itself, so none of the handguard comes over the upper receiver. This prevents any incompatibility issues, commonly seen with Billet Uppers. In the photos below the 12.5" SPADA-S Handguard is featured along with the upcoming Lantac Billet Upper Advanced Receiver or UAR. Check in with Lantac USA for their current offerings and upcoming products.


    SPADA-S Handguard Features:

    Patent Pending attachment system.

    1.Will mount to any receiver as none of the handguard comes back over the upper.
    2.Anti Slip Tab that engages with the barrel nut so that the handguard cannot slide forward without both clamping screws being removed fully.
    3. Barrel Nut install does NOT require timing or adjusting to line up. Can be installed quickly and simply and torques to the correct setting without re adjustment to get correct alignment.
    4. Powerful clamping of Handguard onto Barrel Nut with Anti Rotation Insert that is captured between the upper and the rail without any fixings.
    5. Built in anti twist QD sling Swivel point on both sides.
    6. Stainless Helicoil Inserts in key attachment positions.
    7. RAIL EXTENSION SYSTEM R.E.S, allows users to extend the top rail via bolt in sections at different heights and lengths. More on that later.
    8. 1.5'' Outside Diameter, making this one of the lowest profile handguards available.







    http://www.lantac-usa.com/
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  7. #7
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    Midwest Industries K-Series Keymod & SSM M-LOK Series

    Both K-Series & SSM series are offered in a lightweight profile that excludes part of the picatinny rail (MIL-STD-1913).





    http://www.midwestindustriesinc.com/...ategory_ID=149
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  8. #8
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    Knights Armament URX 4



    Description:

    The KAC URX 4 Rail is a fully modular design that utilizes the revolutionary KeyMod accessory mounting system. The URX 4 Rail is stronger and more stable than previous URX designs due to its one piece construction. It is also lighter due to its Integral Barrel Nut (IBN) system of attachment. The IBN system allows the rail itself to act as the barrel nut when torqued onto the rifle, completely eliminating the need for a separate steel barrel nut. KeyMod accessories may be mounted anywhere along the URX 4's length, making it one of the most user configurable designs on the market.

    Specifications:

    Inside Dia: 1.55"
    Outside Dia: 1.68" (Side to Side)

    Each URX 4 Rail comes complete with an installation wrench, shim kit and instructions.

    Available in lengths:

    8.5"
    10"
    10.75"
    13"
    14.5"

    http://www.knightarmco.com/commercial/?term=rails
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  9. #9
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    Geissele SMR(Super Modular Rails)



    Geissele first released a HK version of the SMR in 2012. The SMR was later released for the AR-15 platform as the MK1. The SMR line ranges in sizes from 9.5" to 15", and available in black and desert dirt color. Here are some of the SMR that are available:









    http://geissele.com/rails.html
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