Close-up studio view of the RetroArms INOX pad hop-up chamber washers.
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RetroArms Stainless Steel INOX Pad Hop-Up Chamber Washer (0.1mm - 5 Pack)

The RetroArms INOX Pad Hop-Up Chamber Washer is a precision-engineered stainless steel shim designed to fit between the hop-up chamber and the gearbox. With an ultra-thin 0.1mm thickness, this 5-pack provides essential fine-tuning adjustments for perfect alignment, optimal air seal, and consistent feeding in your airsoft build.

  • Precision Alignment: Corrects minor spacing gaps between the gearbox and hop-up unit for consistent BB feeding.
  • Ultra-Thin Profile: Measures precisely 0.1mm in thickness to allow micro-adjustments in compression.
  • Durable INOX Stainless Steel: Crafted from high-grade stainless steel to resist wear and deformation under high-stress operation.

5.00 € Tax included

4.032258 Tax excluded

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local_shipping FREE delivery to Estonian Parcel terminal from50€ (Omniva or DPD). Details

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Return policy
14-day return option after receiving the goods

RetroArms INOX Pad Hop-Up Chamber Washer – Precision Spacing & Alignment Shim

Achieve flawless compression and optimal nozzle alignment in your custom airsoft build with the RetroArms INOX Pad Hop-Up Chamber Washer. Proper distance and alignment between the gearbox shell and the hop-up chamber are critical for maintaining a consistent air seal and preventing feeding malfunctions. These precision-cut stainless steel washers allow technicians to fine-tune spacing with absolute accuracy.

Manufactured by RetroArms from premium-grade INOX stainless steel, each pad features an ultra-thin 0.1mm thickness. This minimal profile allows you to micro-adjust the forward pressure and position of the hop-up unit against the gearbox without over-compressing components. Supplied in a convenient 5-pack, these shims are an essential addition to any advanced tech bench for high-performance builds.

Key Features

  • Optimized Air Seal: Eliminates microscopic gaps between the gearbox and hop-up to secure compression.
  • High-Grade INOX Steel: Resilient stainless steel construction prevents crushing, warping, or corrosion.
  • Micro-Adjustment Capable: 0.1mm ultra-thin profile allows pinpoint spacing control.
  • Convenient Pack: Includes 5 matching washers per package for multiple builds or stacking adjustments.

Technical Specifications

Manufacturer RetroArms
Product Type Hop-Up Chamber Washer / Spacing Shim
Material INOX Stainless Steel
Thickness 0.1 mm
Quantity 5 pieces per pack
Compatibility Standard airsoft gearboxes and hop-up chambers
Retroarms
7221
New
2 Items
8596308085518

1. Orders & Shipping

What are the shipping methods?

We ship across Estonia using Omniva and DPD parcel terminals. You can also choose to pick up your order personally from our Tallinn store.

How fast will I receive my order?

In-stock products are usually dispatched within 1–2 business days. For items marked "On order" or "Tellimisel," delivery may take up to 15 business days.

Do you ship internationally?

Yes, we ship across Europe. To see the exact shipping cost, please enter your address during checkout or contact us directly.

3. Returns & Claims

Can I return a product if it doesn't fit?

Yes, a 14-day return right applies to products purchased from the online store. The product must be unused, in its original packaging, and with tags attached. Underwear and hygiene products cannot be returned.

Items purchased from the physical store cannot be returned for a refund; however, we can exchange them for a gift card or another product. Used products cannot be returned.

How do I return a product?

Please contact us at info@milshed.com to arrange the return method. In Estonia, returns via parcel terminal are usually free.

What happens if a product breaks?

Private individuals have a 2-year right to file a claim. If a defect appears within the first 6 months, it is assumed it existed at the time of purchase (manufacturing defect).