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Airtech Studios Advanced Arm & M-nub for TM Style M4 Hop-up Chambers

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Airtech Studios Advanced Arm & M-nub for TM Style M4 Hop-up Chambers
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Airtech Studios


MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Non-Export ItemShips Inside USA Only
This is an export-restricted item and can only be shipped within the United States. No international delivery for these items.


  • Perfect Self-Levelling TDC Top-down-centre force applied evenly on the R-Hop patch
  • No need for modifying the stock arm and adding M-nub (our arm provides both!)
  • Easy drop-in with no modifications required
  • M-nub provides an even distribution of force applied across the whole surface of the R-Hop patch
  • Tough Polycarbonate Construction
Thinking of installing an R-Hop set-up on your rifle? Instead of modifying your stock ARM by cutting /sanding which may run the risk of an unbalanced force pressing on the R-hop patch - our R-HOP arm is designed to be a drop-in upgrade to mitigate the risk to give a perfect, TDC (top-down-centre) evenly forced pressure.

We were inspired by the self-leveling nub feature found on the Maxx brands for the Silverback SRS hop-up and wanted to bring ideas to the M4 platform.

For R-hop to function perfectly, the patch, arm, and barrel are only one part of accuracy, using high-quality ammo, a good compression system, Inner barrel stabilization, and keeping the barrel clean are also important parts of the total ultimate accuracy equation.

What is R-Hop?

R-Hop is a popular modification in the Airsoft market in which a high-density rubber patch is installed in the hop-up window and then polished flat on the inside of the barrel to ensure perfect fitment. R-Hop improves the consistency of each consecutive shot, improves peak backspin and air seal, and provides the user with higher tolerances to imperfections in the projectile. All of these features combine to offer the Airsofter a higher-performing Airsoft weapon.

Manufacturer: Airtech Studios


Compatibility: TM Spec M4 Hop Ups
Material: Polycarbonate

About Airtech Studios

At Airtech, we pride ourselves on finding and developing bespoke Airsoft accessories that enhance your Airsoft gaming experience.

Our team at Airtech Studios strives to develop unique innovations to push the boundaries of Airsoft performance to its limits and beyond.

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