The RSB® Vertical Grip- A fully machined, ultralight stubby aluminum grip. Designed to work best with PDW and short-barrel setups, this 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 overhanging the bottom.” While the product description of the RSB stubby vertical grip from RailScales’s website gives prospective buyers a brief explanation of the technical specifications, it doesn’t capture everything this AR-15 Stubby grip has to offer. When taking a closer look at the fine details in its design, the multiple uses it allows for, and how it compares to similar AR 15 accessories, it's arguable that the RSB is the best stubby vertical grip on the market currently.

High Quality Aluminum AR Accessories

While primarily known in the firearms industry for its machined G10 MLOK rail panels, RailScales has supplemented its product lineup with an assortment of high-quality items machined out of aluminum as well. The RailScales Stubby Boi, more commonly known by its acronym “RSB”, is one of a variety of different vertical forward grips they offer. Unlike the more non-traditional Anchor, which touts a 90º vertical grip surface on one side and is reversible to allow for a more relaxed 70º angled grip surface, the RSB is more in-line with traditional “stubby” style vertical grips. Where the RSB sets itself apart from other AR-15 stubby grips available on the market is in its efficient and streamlined design, which allows for the use of 6061 billet aluminum for material strength in place of the more commonly used polymer, without sacrificing extra weight. Coming in at a feathery 2 ounces with hardware included, the RSB is lighter than almost every polymer stubby grip currently available.

Honeycomb Texture

Compared to some of its other AR-15 vertical grip offerings that include its patented Honeycomb texture, the RSB by RailScales sports three smooth ribbed sections designed for the placement of the top three fingers. Aimed at attracting the more traditional AR-15 stubby grip users, this also gives the RSB a built-in indexing point to quickly bring the support hand to the right position and lock-in. For those looking to add a little bit more edge to their grip, RailScales has also recently released another version, the RSB/M which features additional machining to include more textured grip points for those who want a bit more purchase when grasped.

Perfect For Shorter To Mid-Length Carbines

Being somewhat shorter than the Anchor, at slightly less than 2.5 inches off of the AR-15 rail, the RSBs ergonomics tend to fit shorter PDW style setups, but can also fit nicely on mid-length carbines. An intentionally designed feature that regularly gets overlooked is the “cylinder” of the RSB is offset from the center by 0.140” which allows for it to be finely tuned fitment by simply reversing its direction. Engineered to keep the overall footprint to a minimum the RSB takes up only 1 MLOK slot which lets it fit on virtually any AR-15 style MLOK rail despite the overall length of the handguard.

Seamless Control Accessory Offerings

Finally, as is the case with almost all of RailScales’ control accessory offerings, the RSB will fit perfectly inside the cutout of their XOS-H three-sided G10 rail panels. When paired together, they partner up seamlessly when attaching to the AR-15 MLOK rail giving the end-user a barrier against heat coming off of the barrel without sacrificing the placement of their vertical forward grip. With multiple mounting options, fine-tuning adjustment capability, ultralight design, material strength, and overall aesthetic appeal, the RSB stands apart from virtually any other stubby vertical grip available.

FAQ: RSB® Stubby Vertical Grip by RailScales

Q: What makes the RSB® different from other stubby vertical grips?

• The RSB® is fully machined from 6061-T6 aluminum, offering the strength of steel with less than half the weight. At only 2 ounces including hardware, it outperforms most polymer grips in durability, heat resistance, and rigidity — all while maintaining an ultralight footprint.

Q: Is the RSB® better suited for PDW setups or full-length rifles?

• While it was purpose-built for PDWs and short-barreled rifles, the RSB® performs just as well on mid-length and full-length carbines. Its offset cylinder allows users to fine-tune placement, making it ideal for everything from compact home defense setups to competition builds.

Q: How does the offset cylinder design improve performance?

• The RSB®’s 0.140" offset allows for minor positional adjustments simply by reversing the grip's direction. This gives shooters more freedom to dial in the optimal grip location for their hand size, rail space, and shooting style — especially valuable on smaller rails where every millimeter counts.

Q: Is the RSB® textured or smooth?

• The standard RSB® features three smooth ribbed finger grooves for natural indexing and ergonomic grip. For users wanting more aggressive traction, RailScales offers the RSB/M variant, which includes machined texture bands for added grip in wet or gloved conditions.

Q: What kind of aluminum is used, and why does it matter?

• The RSB® is CNC-machined from 6061-T6 billet aluminum, known for its high strength, corrosion resistance, and ability to maintain structural integrity under hard use. It's stronger than polymer and significantly lighter than steel — ideal for performance-focused rifles.

Q: Is the RSB® compatible with other RailScales accessories?

• Yes. The RSB® fits perfectly inside the cutout of XOS-H® three-sided G10 panels. This provides a seamless aesthetic and improves hand protection from barrel heat while maintaining ergonomic placement of the vertical grip.