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Flow Cap Counterweight Kit fully assembled with the black Flow Cap pushed all the way onto the Flow Cap Mount, showing the mount's 2 O-rings, the PTFE shim and the stainless connecting screw at the front
Flow Cap Counterweight Kit, all five pieces weighed together with no light attached: 188 g (6.6 oz), 2.5 in long.
Flow Cap Counterweight Kit fully assembled with the clear Flow Cap pushed all the way onto the Flow Cap Mount, showing the mount's 2 O-rings, the PTFE shim and the stainless connecting screw at the front
What is in the Flow Cap Counterweight Kit box: the stainless Contact Saber Weight, the aluminium Flow Cap Mount with its 2 O-rings and 2 M4 x 3 set screws already installed, the PTFE shim and the stainless connecting screw shown in their assembly orientation on the build axis, and the Flow Cap
How the joint locks, every part to scale: the Saber Hilt Extension, which is sold separately, threads to the Flow Cap Mount, and the PTFE shim and stainless connecting screw lock the two together with the 4 mm Allen key. The mount, shim, screw and key are in the box; the hilt extension is not.
Flow Cap Counterweight Kit
Flow Cap Counterweight Kit in black, rotating 360 degrees
Flow Cap Counterweight Kit in clear, rotating 360 degrees
NEW

Flow Cap Counterweight Kit

The complete rear-balance upgrade for contact builds.

The complete rear-balance upgrade for contact builds.

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$103.00 Regular price
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The Flow Cap Counterweight Kit is the complete rear-balance upgrade for RGB Critter contact saber and staff builds, designed to maximize centrifugal force, momentum, and stability during advanced flow movement.

The Flow Cap Mount is precision-machined from aircraft-grade aluminum and threads directly onto the rear of the RGB Critter BT or the Saber Hilt Extension. It adds structural length while creating a rugged rear mounting point built for high-motion spinning and contact-style use.

Full details and specs Show less

The included Flow Cap is made from high-strength silicone, providing a soft yet durable rear finish that helps protect the end of your build during drops and impacts. The cap pushes on and pulls off with a friction fit, locking into the mount using an internal rib-matching profile, creating a clean finished end without clips or exposed hardware. It does not twist on.

At the core of this kit is the stainless steel counterweight insert. Stainless steel provides significantly greater mass than aluminum in the same footprint, increasing centrifugal force during spins. The added tail-end weight improves stability, smoothness, and control for contact saber and staff-style balance.

The weight has no threads. It slides into the mount's bore, and the mount's two preinstalled M4 x 3 set screws tighten down into a machined groove in the weight to lock it in place, forming a solid connection engineered for repeated performance use.


Includes

  • Flow Cap (high-strength silicone, clear or black, black default)
  • Flow Cap Mount (precision-machined aircraft-grade aluminum)
  • Stainless steel Contact Saber Weight
  • 2x M4 x 3 set screws, preinstalled in the mount
  • 2mm Allen key, for the set screws
  • Flow Cap Counterweight System Screw, the stainless connecting screw
  • Flow Cap Counterweight System Shim (PTFE)
  • 4mm Allen key, for the connecting screw

Locking it to the Saber Hilt Extension

The connecting screw, the PTFE shim and the 4mm Allen key that drives them are all in the box, and together they let you semi-permanently join the Flow Cap Mount to the Saber Hilt Extension.

The shim seats at the joint between the two parts, and the screw passes through the front of the mount into the hilt extension. Once it is tightened, the mount and the hilt extension will not unthread, rotate or work loose no matter how hard you spin. They stay joined until you take the screw back out with the 4mm Allen key.

Installing it is optional. Leave the screw out if you want to keep breaking the build down by hand, and put it in if you want a fixed, rattle-free rear end for contact and high-speed work.


Specs

  • Total rear assembly weight (with Flow Cap installed): 6.6 oz (188 g)

  • Total rear assembly weight (mount + stainless weight): 5.5 oz (156 g)

  • Stainless steel counterweight insert: 3.7 oz (104 g)

  • Flow Cap Mount (aluminum): 1.8 oz (52 g)

  • Flow Cap (silicone): 1.1 oz (32 g)

  • Adds 54 mm total length to the rear of the saber

  • Durable, impact-safe construction for contact-style use

Color
Kit price$103.00
Regular price
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30-day returns

Shipping to Australia is a flat rate from $29.95 USD, added at checkout. Free shipping is US only. Shipping policy.

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Kit $103.00 $103.00

2-year warrantyDefects in materials or workmanship are covered for 2 years from the date of purchase.

Lifetime upgrade in the cartAdd it and every item in the order is covered for as long as you own it. Batteries are covered for 60 days.

Free 30-day US returnsUnused and in the original packaging, and we email you a prepaid label. International returns are accepted within 30 days, return postage is yours.

Broke in use?That is a warranty claim, with no 30-day limit. Email support@antsonamelon.com and we repair or replace it.

Full warranty policy  ·  Full return policy

Flow Cap Counterweight Kit
Flow Cap Counterweight Kit
Black
$103.00 Regular price
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International Shipping Restriction

This lithium-ion battery cannot be shipped internationally and cannot be added to your cart.

You can purchase the required battery locally with these specifications:

  • 18650
  • Lithium-ion
  • 3.6V nominal
  • Unprotected
  • Flat top
  • 18.3mm diameter × 65.0mm length

Do not purchase protected, button top, 3.2V, or 1.5V cells.

Ants on a Melon is not responsible for batteries purchased from third-party sellers. Please verify specifications and use only high-quality lithium-ion cells from reputable brands.

LIFETIME WARRANTY
Every item in your order, for life.
Our gear comes with a 2-year warranty. This upgrade extends every item in your order to lifetime.
WHAT YOU ALREADY GET
2 years on everything in your order, free. Batteries have their own 60-day warranty.
WHAT THIS ADDS
If anything in this order fails from a defect, we repair or replace it for as long as you own it.
NO HASSLE CLAIMS
Email us photos or a short video. Most repairs are back out in 2 to 3 working days.
NOT COVERED
Drops, a cracked housing, loss, theft, broken fiber strands and normal battery wear.
International duties & VAT
A quick heads-up for orders shipping outside the US.
Set by your destination
Import duties and VAT are charged by your country's customs, not by Ants on a Melon.
Paid on delivery
Your carrier collects any charges when they deliver. Amounts vary by country.
Still fully guaranteed
Every international order is guaranteed to arrive. Need help? Email support@antsonamelon.com