---
product_id: 543965771
title: "Fast Cap Adapter Compatible with BYRNA SD EP LE - Boost Cartridge Quick Change with Hex (Black)"
brand: "k20 tools"
price: "€ 48.05"
currency: EUR
in_stock: true
reviews_count: 11
category: "K20 Tools"
url: https://www.desertcart.es/products/543965771-fast-cap-adapter-compatible-with-byrna-sd-ep-le-boost
store_origin: ES
region: Spain
---

# Fast cartridge changes in seconds Tool-free, hand-tightened design Durable anodized aluminum build Fast Cap Adapter Compatible with BYRNA SD EP LE - Boost Cartridge Quick Change with Hex (Black)

**Brand:** k20 tools
**Price:** € 48.05
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your BYRNA game with the fastest cap adapter in the market!

## Quick Answers

- **What is this?** Fast Cap Adapter Compatible with BYRNA SD EP LE - Boost Cartridge Quick Change with Hex (Black) by k20 tools
- **How much does it cost?** € 48.05 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/543965771-fast-cap-adapter-compatible-with-byrna-sd-ep-le-boost)

## Best For

- k20 tools enthusiasts

## Why This Product

- Trusted k20 tools brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleek & Sturdy:** Anodized black aluminum finish combines durability with modern style.
- • **Boost Your Shots:** Supports 12g CO2 cartridges for longer sessions and wider availability.
- • **Secure & Leak-Proof:** Hand-tightened cap ensures a snug, reliable seal every time.
- • **Lightning-Fast Reloads:** Swap CO2 cartridges in seconds—no tools, no hassle.
- • **Universal Compatibility:** Works seamlessly with BYRNA SD, EP, HD, LE & most third-party cartridges.

## Overview

The K20 Tools Fast Cap Adapter is a premium, anodized aluminum quick-change CO2 cartridge cap designed for BYRNA SD, EP, HD, and LE launchers. Its tool-free, hand-tightened design enables rapid cartridge swaps without compromising a secure seal. Compatible with both original and most third-party 12g CO2 cartridges, it enhances convenience and performance for active users seeking efficiency and reliability.

## Description

desertcart.com : K20 Tools - Fast Cap Adapter Compatible with BYRNA SD EP LE - Boost Cartridge Quick Change with Hex (Black) : Sports & Outdoors

Review: The best accessory for your Byrna. Period. - I bought the Fast Cap Adapter for my Byrna SDXL launcher and I am very happy with it. It makes changing the CO2 cartridge so much easier and faster than using the factory cap and the magazine tool. I can just twist the cap by hand and replace the cartridge in seconds. No more fumbling with the tool or worrying about losing it. The Fast Cap Adapter is also compatible with the Byrna Boost Adaptor (XL), which allows me to use 12 gram CO2 cartridges instead of 8 gram ones. This gives me more shots per cartridge and more convenience, as 12 gram CO2 cartridges are widely available everywhere. The Fast Cap Adapter is made of stainless steel and has a polished finish. It looks great and feels sturdy. It fits snugly on the CO2 chamber and does not leak or rattle. It is easy to install and remove, and does not damage the launcher or the cartridge. I highly recommend the Fast Cap Adapter to anyone who owns a Byrna SD, EP or HD launcher. It is a great accessory that improves the performance and usability of the launcher. It is worth every penny and I am very satisfied with it.
Review: Works great, makes changing cartridges fast and easy. - Works great, fast and easy to unscrew and replace CO2 cartridge. My Kydex IWB holster needed a slight mod for the extended length but that was fairly easy.

## Features

- C02 Adapter – Fast cap design allows quick cartridge changes
- Compatible with BYRNA SD, HD, EP, LE "Not compatible with CL"
- Tool-Free design: Replace the Co2 cylinder in seconds without the hex key
- Hand-Tightened: easy to install and remove ensuring a secure seal without over-tightening
- Compatible with Byrna CO₂ cartridges and most third-party brands commonly found in local stores
- Made of aluminum - Anodized black finish
- ORIGINAL DESIGN

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CD181XML |
| Best Sellers Rank | #44,185 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #233 in Gunsmithing Tools |
| Brand Name | K20 Tools |
| Customer Reviews | 4.5 4.5 out of 5 stars (318) |
| Date First Available | July 27, 2023 |
| Item Dimensions LxWxH | 0.86 x 0.8 x 0.75 inches |
| Item Package Dimensions L x W x H | 4.84 x 3.39 x 1.06 inches |
| Manufacturer | K20 Tools |
| Model Name | Quick release cap |
| Package Weight | 0.03 Kilograms |
| Size | Oem |
| Suggested Users | unisex-adult |
| Warranty Description | 6 months of warranty after delivery date |

## Product Details

- **Brand:** K20 Tools
- **Color:** Black
- **Included Components:** (1) Cap
- **Material:** Aluminum
- **Product Dimensions:** 0.86"L x 0.8"W

## Images

![Fast Cap Adapter Compatible with BYRNA SD EP LE - Boost Cartridge Quick Change with Hex (Black) - Image 1](https://m.media-amazon.com/images/I/71q04PL6KCL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ The best accessory for your Byrna. Period.
*by J***F on September 7, 2023*

I bought the Fast Cap Adapter for my Byrna SDXL launcher and I am very happy with it. It makes changing the CO2 cartridge so much easier and faster than using the factory cap and the magazine tool. I can just twist the cap by hand and replace the cartridge in seconds. No more fumbling with the tool or worrying about losing it. The Fast Cap Adapter is also compatible with the Byrna Boost Adaptor (XL), which allows me to use 12 gram CO2 cartridges instead of 8 gram ones. This gives me more shots per cartridge and more convenience, as 12 gram CO2 cartridges are widely available everywhere. The Fast Cap Adapter is made of stainless steel and has a polished finish. It looks great and feels sturdy. It fits snugly on the CO2 chamber and does not leak or rattle. It is easy to install and remove, and does not damage the launcher or the cartridge. I highly recommend the Fast Cap Adapter to anyone who owns a Byrna SD, EP or HD launcher. It is a great accessory that improves the performance and usability of the launcher. It is worth every penny and I am very satisfied with it.

### ⭐⭐⭐⭐⭐ Works great, makes changing cartridges fast and easy.
*by R***R on October 5, 2025*

Works great, fast and easy to unscrew and replace CO2 cartridge. My Kydex IWB holster needed a slight mod for the extended length but that was fairly easy.

### ⭐⭐⭐⭐⭐ Not As Pictured (Better, IMO)
*by T***W on November 30, 2025*

11/26/2025 - I see differing reports on how these look in the reviews so I'll confirm that as of this date they are the matte black finish, brand text on the side edge (not front as pictured), and threaded correctly for proper fit. Looks and fits perfect in my opinion and the build quality is good. Easy to screw on an replace and the price is right. I think the grip texture on these is better than what I'm seeing from some of the other options too.

## Frequently Bought Together

- Fast Cap Adapter - Compatible with BYRNA SD EP LE HD - Cartridge Quick Change
- Byrna 12 Gram CO2 + Oiler Cartridges | 10 Count Pack | for Byrna LE/HDXL/SDXL and TCR - (9 CO2 + 1 Oiler Cylinders)
- Byrna MAX Projectiles - | Maximum Stopping Power | OC and CS Non Lethal Pepper Spray & Tear Gas Blend Balls - Non Lethal Self Defense Projectile Rounds for Byrna Launchers, 0.68 Caliber

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**Shop now:** [https://www.desertcart.es/products/543965771-fast-cap-adapter-compatible-with-byrna-sd-ep-le-boost](https://www.desertcart.es/products/543965771-fast-cap-adapter-compatible-with-byrna-sd-ep-le-boost)

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-24*