SR M-LOK Rail 13.5"

Now: $184.95
(You save )
(7 reviews) Write a Review

Griffin Armament® M-LOK compatible SR rails (Suppressor Ready) allow up to 1.5” outside diameter silencers to be mounted inside the octagonal M-LOK rail. This provides suppressor aficionados a sleek, and compact overall length to AR15 type firearms.
Design objectives of this rail were to provide a suppressor compatible rail, with increased rigidity and durability over similar weight and profile current market options. A custom extrusion provides significant internal reinforcements to reduce flex when loading the carbine on the rail.

These reinforcements provide rigid mounting for IR laser aimers ensuring minimal POI shift when torque is applied to fore-grip type accessories, or when loads are applied to the rail such as practical shooting off barricades or when loading bipods for rapid follow up shots. Internal practical testing showed substantial reductions in POI shift with laser aimers versus competing "slim rails" that lacked this notable product feature.

The new SR rails features a close tolerance, heavy-duty, 7075 aluminum, T-6, type 3 hard coat anodized finish. The barrel nut can be easily installed to 35-85 ft/lbs using the included Griffin Armorers Wrench.  The new slip fit clamp design is extremely user friendly and does not require any shims or special timing methods. The clamp geometry in the rear section of the rail is low profile and ergonomically pleasing even for long durations of extended carry at static security positions. Flat head T15 torx screws should be tightened to 25/in pounds.  M-LOK flats on each 45 degree surface allow for mounting of your favorite M-LOK accessories. A contiguous picatinny top rail ensures repeatable and accurate mounting for night vision and thermal systems.

If you are looking for a high quality, feature rich, American made rail system for your AR15 type firearm look no further than Griffin Armament® SR rails.
Key points - price and inclusions:

  • MSRP from $184.95
  • Available Lengths 13.5”, 12.5”, 11.5”, 10.5”, 9.5”, 7.5”
  • 7 sides of M-LOK interfaces
  • Contiguous 1913 Picatinny top rail
  • Low profile, user friendly, clamp installation design
  • Multi-Function Griffin Armorers wrench included
  • 6061-T6, Type 3 hardcoat anodized SR Rail
  • 7075, T-6, Type 3 hardcoat anodized, aluminum barrel nut

45 degree Picatinny QD swivel mount (pictured but not included)

Specs : 

  • Length: 13.5"
  • Height 2"
  • Internal Diameter 1.54" (measured from inside of reinforcement spars)
  • Width: 1.79"
  • Weight Installed: 11.8 ounces
Gas Block and Furniture Included?:
Type Of Part:


7 Reviews

  • 5
    SR M-LOK Rail 13.5"

    Published by Michael Rogers on 19th Dec 2023

    This rail is top notch, the construction, fit, and finish are exceptional. This rail is easy to install and takes less than 10 minutes, it's lightweight, this rail is lighter than another suppressor rail I have e that is shorter in length. I just wish it came in a 14 to 14.5 in length so I can get the tucked look on my 14.5 rifle. I will be purchasing a lot more Items from Griffin.

  • 4
    13.5 SR mlok rail

    Published by Adam on 11th Dec 2023

    Quality piece

  • 5

    Published by Francis Anusky on 9th Mar 2023

    Looks just the way i was hoped it would. Feels great..

  • 5

    Published by Mountain Jew Josh on 24th Dec 2022

    I am very satisfied with this rail. Easy install, feels strong and looks good. I will likely buy another to spruce up an old rifle.

  • 5
    Mloc rail for suppressor compatibility

    Published by Sam worthey on 23rd Dec 2022

    I pined and welded a suppressor to a barrel and wanted a rail that would fit over the suppressor without being too bulky and this griffin armament rail was perfect.

  • 5
    Outstanding rail system

    Published by Genesys Tactical ) Master Level 1 #CRP Christopher Caldwell on 18th Aug 2022

    I have run suppressor ready handguards from 4 other manufacturers and haven't been happy with the feel or footprint any of them provided. I nearly gave up on the idea of having a handguard that could tuck away ant of the cans I run. This Griffin changed that. It fits perfectly, hugs my suppressor and feels comfortable shotting with my C-grip style. This is not the product ill be running on all of my suppressed rifles. Outfuckingstanding work Griffin!

  • 5
    Really nice rail

    Published by BW on 6th Dec 2021

    I have a few different rails from a various manufacturers on my rifles, but this is my new favorite. It’s lightweight but feels tough, and installation was a breeze with the included barrel nut wrench. I wouldn’t hesitate to use this rail on any rifle I own and will recommend it to anyone. The 13.5 length is perfect for a 16” barrel by the way.