(40 reviews) Write a Review

Product Overview

Now shipping with our new custom Torx T20 fasteners!

RSB® Vertical Grip - A fully machined ultralight stubby aluminum grip. Designed for PDW and shorter barrel setups but its ergonomics also find itself at home on carbines as well. The cylinder of the grip is offset 0.140" to allow for fine adjustment in its already small footprint by alternating its direction. When used as a broom handle style grip, the RSB® allows for a 3 fingered grip with the pinky over hanging the bottom. XOS-H® scale compatible.

Ships Free and Made in USA

  • 1 MLOK Slot / 2 KeyMod Holes
  • XOS-H® scale compatible
  • Length: 2.488"
  • Width: 1.18"
  • Outside Diameter: 1.42"
  • Weight: 2 oz with hardware
  • 6061-T6 Aluminum


© 2023 RailScales LLC All rights reserved. RailScales®, RSB®  XOS-H®  are registered trademarks of RailScales LLC.

For all patents and trademarks, see


(40 reviews) Write a Review

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  • 5
    Perfect for handguards with a single mlok slot

    Posted by Tyler Frogley on Jul 16th 2023

    When I was scouring the internet for an mlok vfg I noticed most polymer ones have extensions that index into a front and rear mlok slot. I chose this one because it appeared to fit in a single mlok slot allowing for other mlok real estate to be utilized for other purposes. I could see this being perfect for an SBR build where minimal mlok slots are available. It’s also dual use for dikmod and mlok which I had no idea but it’s at least good to know if I ever migrated. It’s also pretty comfortable and not excessively long IMO.

  • 4
    Great, but overly expensive.

    Posted by Eli on May 11th 2023

    Great product, very well made, great feel. But overly expensive for a piece of milled aluminum.

  • 5

    Posted by David Sweet on May 4th 2023

    Best vertical grip I’ve ever felt. It is perfect. Replaced my Anchor with this.

  • 5
    I "Need" More Of These!

    Posted by 2A-PEW-PEW-PAPA on Apr 29th 2023

    These foregrips are Phenomenally KickAss!

  • 5
    sweet vertical boi

    Posted by Andyroo on Sep 15th 2022

    railscales is a awesome company I buy from them all the time. the grip fits my hand great. and the finish is awesome. worth the money

  • 5
    Best vertical grip out there

    Posted by Kyle on Sep 9th 2022

    I love these grips . All of them !

  • 5
    RBS Second to None

    Posted by Fabian Cruz on Jun 28th 2022

    The RSB is lightweight and sturdy. Everything from Railscales is top notch. My go to for all their accessories for my rifles.

  • 5

    Posted by Rex on May 9th 2022

    Big fan of the quality and ability to apply to both Keymod and mlok. Solid build. The price tag is the only downside.

  • 5
    RSB vertical grip

    Posted by Jake on Apr 16th 2022

    I love this grip! Super light but stout. I use my vertical grip to pull the weapon back towards my shoulder with my middle and ring finger, while wrapping my thumb around the rail, so this grip is prefect size for that. If you use your grip like a handle, your bottom two fingers will hang off (unless you have tiny hands). Quality and customer service with Railscales is superb. Fast shipping too. I will buy more from these guys. This is my second RSB. I have one Terra bronze and one black. I love them.