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Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard Up to $10.00 Off, Coupon Available w/ Free Shipping — 3 models

Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
1 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
2 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
3 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
4 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
5 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
6 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
7 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
8 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
9 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
10 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
11 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
12 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
13 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
14 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
15 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
16 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
17 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017
18 of 18 images
Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017

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Questions & Answers
Looking to change out the rail on my ar10 with a quad rail. Seems like quad rails for ar10s are very hard to find. Will this fit on an ar10?

No, handguards are not interchangeable between small frame and large frame AR platforms unless the rifle you have is a specific small frame AR-10, like the Rugar SFAR. Further, your AR-10 pattern is going to determine what rails you can use. DPMS High being the most popular, followed by DPMS low, and Armalite. Note, Palmetto State Armory uses a proprietary rail system height and will only properly fit with their own handguards. Centurion, Samson, and SLR make high quality quad or semi-quad rails for DPMS high patterned AR-10s.

by Demmons, Verified Owner, October 8, 2025
Will this fit with the M&P 15T ??? Can you answer this question?
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Product Info for Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard

Rainier Industries Pro Series line of rails were designed for the hard use, professional end-user. To achieve this, we designed it an extended aluminum barrel nut and larger stainless steel mounting lugs for better rigidity to maintain a mechanical zero. The Pro Series Quad rail built to stand up to the rigors and demands of what your duty weapon requires.image

Specifications for Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard:

Manufacturer: Rainier Arms
Color: Black
Finish: Mil Spec Type III Hard Coat Anodized
Fabric/Material: 6000 Series Aluminium
Gun Make: AR Platform
Gun Model: AR-15
Attachment Type: Picatinny

Features of Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard

  • CNC machined 6000 series extruded Aluminum
  • Hard Coat Anodized Milspec Type III, Class 2 Black
  • Barrel Nut is 7075 Aluminum, steel wrench and mounting hardware included
  • No Barrel nut shims required for installation
  • Weight: 19.2 oz
  • 1.31 in interior diameter, 2.2 x 1.97 outer dimensions
  • Full length picatinny rails with laser engraved position marks at the 3, 6, 9 and 12 oclock positions
  • Compatible with most known low profile non-adjustable and adjustable gas blocks

Package Contents:

  • Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard
  • Barrel nut and hardware

Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard Orderable Models

List of Orderable Models

  • Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 11.75 in, RA014 , MPN: RA014 , UPC: 744985351879 , Code: 4ZM-HZ-RAAR16-RA014
  • Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 9.55 in, RA016 , MPN: RA016 , UPC: 744985351893 , Code: 4ZM-HZ-RAAR16-RA016
  • Rainier Arms Rainier Industries Pro Series Mk2 Quad-Rail AR-15 Handguard, Black, 12.55 in, RA017 , MPN: RA017 , UPC: 744985351886 , Code: 4ZM-HZ-RAAR16-RA017
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Last updated 2026-07-07 UTC.