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Questions & Answers
will this fit a Smith and Wesson M&P Sport 2? Manufacturer Answer

If your upper is Mil-spec in terms of how the barrel nut interfaces with the upper receiver, then it is compatible.

by Griffin Armament, Manufacturer, June 15, 2022
The pictures show with and without the integrated QD cups in the rail. Which one is being offered here? Manufacturer Answer

The integrated QD sling swivel was an older design. The rails being sold now have a barrel nut that does not need to be timed with the omission of the QD sling swivel socket.

by Griffin Armament, Manufacturer, August 31, 2022
Customer Reviews
Helpful Positive Review
great lightweight tough rail by VA Trav, Verified Owner, December 1, 2022
My 3rd low profile rail so far with the integral ribs inside it’s as tough and stiff as anything out there yet still smaller diameter and lighter weight. Win. Win. As tough and sturdy as a Geissele with no shift or lost of laser zero. At the same tim...
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1/1 found this helpful
Helpful Positive Review
High quality by Pat, Verified Owner, August 4, 2020
Ordered this product knowing they were a newer company but heard they build high quality stuff, that's what I like. Ordered it took a while to receive during covid season but now that I have it I would have waited twice as long to receiver it before ...
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1/1 found this helpful
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Product Info for Griffin Armament Low Pro Rigid M-Lok Rail

Griffin Armament Low-Pro-Rigid rails are a slim, low profile, ultralight, yet rigid M-Lok rail. Design objectives of this rail were to provide a slim, ultralight rail, with increased rigidity over similar weight and profile current market options. A custom extrusion provides significant internal reinforcement to reduce flex when gripping the carbine firmly in the shoulder pocket. Understanding the importance of low light targeting, 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 (shooting off barricades, loaded bipods etc). Internal testing showed 70% less POI shift with laser aimers versus competing "slim rails". Carefully positioned slots in the rail allow for rapid cooling when running the carbine fast while maintaining rigidity.image

The Low-Pro-Rigid rail features a close tolerance, heavy-duty, 17-4 stainless steel H900 heat treated barrel nut, which can be installed with the included Griffin GI Armorers Wrench. The rail is very user friendly to install. The slip fitted clamp design doesn't requiring any shims or special timing methods. The clamp boss in the rear section of the rail is low profile and ergonomically pleasing for relaxed posture carry at static positions. Flat head T15 torx screws should be tightened to 25/in pounds. The barrel nut should be tightened to ~55ft/lbs.

M-Lok slots at the 3, 6, and 9 o'clock positions allow for mounting of your favorite M-Lok accessories.

Specifications for Griffin Armament Low Pro Rigid M-Lok Rail:

Manufacturer: Griffin Armament
Color: Black
Finish: Nitride
Fabric/Material: 6061-T6 Aluminum
Gun Make: AR Platform
Gun Model: AR-15
Gun Type: Rifle
Gun Rail: M-LOK
Weight: 5.9 oz
Condition: New
Included Accessories: Standard
Inner Diameter: 1.35 in
Height: 2 in
Mount Type: Picatinny
Width: 1.54 in
Gas System: Direct Impingement
Length: 7.5 in
Quantity: 1

Features of Griffin Armament Low Pro Rigid M-LOK Rail

  • Internal ribs provide increased strength-to-weight ratio
  • Heavy Duty, 17-4 Stainless Steel H900 heat treated barrel nut
  • Custom extrusion designed for pleasing ergonomics
  • Heavy Duty Griffin Armorers wrench/multi tool

Package Contents:

  • Griffin Armament Low Pro Rigid M-LOK Rail
  • Mounting hardware
  • Thread locker

Griffin Armament Low Pro Rigid M-Lok Rail Orderable Models

List of Orderable Models

  • Griffin Armament Low Pro Rigid M-Lok Rail, 13.5in, Black, Large, LPR135 , MPN: LPR135 , UPC: 791154085479 , Code: 28N-HZ-LPRMLOKR-LPR135
  • Griffin Armament Low Pro Rigid M-Lok Rail, 15in, Black, Large, LPR15 , MPN: LPR15 , UPC: 791154085486 , Code: 28N-HZ-LPRMLOKR-LPR15

Griffin Armament Low Pro Rigid M-Lok Rail Unavailable & Discontinued Models

List of Unorderable Models

  • Griffin Armament Low Pro Rigid M-Lok Rail, 9.5in, Black, Large, LPR95 , MPN: LPR95 , UPC: 791154085349 , Code: 28N-HZ-LPRMLOKR-LPR95
  • Griffin Armament Low Pro Rigid M-Lok Rail, 10.5in, Black, Large, LPR105 , MPN: LPR105 , UPC: 791154085462 , Code: 28N-HZ-LPRMLOKR-LPR105
  • Griffin Armament Low Pro Rigid M-Lok Rail, 12.5in, Black, Large, LPR125 , MPN: LPR125 , UPC: 791154085356 , Code: 28N-HZ-LPRMLOKR-LPR125
  • Griffin Armament Low Pro Rigid M-Lok Rail, 7.5in, Black, Large, LPR75 , MPN: LPR75 , UPC: 791154085332 , Code: 28N-HZ-LPRMLOKR-LPR75
  • Griffin Armament Low Pro Rigid M-Lok Rail, 8.6in, Black, Large, LPR86 , MPN: LPR86 , UPC: 791154085455 , Code: 28N-HZ-LPRMLOKR-LPR86
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