$69.95

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Sidewing S3

Name: Sidewing S3 (Spiritus Systems)
Brand: Beez Combat Systems
Price: 69.95 USD
Availability: InStock

Increase the carrying capacity of your Spiritus Micro Fight Chest Rig Mk4/Mk5 clone with the Sidewing S3 expansion panel. Designed for users who need additional gear storage, the Sidewing S3 converts a compact chest rig into a larger modular platform with expanded attachment space for pouches, accessories, and mission-essential equipment.

Featuring three laser-cut attachment columns, the Sidewing S3 provides additional mounting options while maintaining a lightweight, streamlined profile. The dual-sided design allows users to mount pouches and accessories on both sides simultaneously, making it an excellent choice for tactical operations, patrol, training, range use, and extended missions.

Built with laser-cut GRID laminate, MIL-Spec thread, elastic, and Velcro, the Sidewing S3 delivers dependable performance in demanding environments. Constructed from Berry Compliant materials and proudly made in the USA, it is designed for long-lasting durability and modular versatility.

Features:

Converts Spiritus Micro Fight Chest Rig Mk4/Mk5 clones into a larger chest rig configuration
Three laser-cut columns for expanded pouch and accessory attachment
Supports simultaneous pouch mounting on both sides
Top lock-down flap for secure retention
Two 1/8" bungee attachment points
Four 1" female ITW-compatible buckles
Additional laser-cut attachment points for increased customization
Lightweight design with expanded modular gear capacity

Materials & Construction:

Laser-cut GRID laminate construction
MIL-Spec thread, elastic, and Velcro
Berry Compliant materials
100% made in the USA

Dimensions:

Total length: 23" (end of female buckle to female buckle)
Velcro attachment field: 5" x 8.5"

Compatibility Notice:
Designed as an aftermarket accessory compatible with Spiritus Micro Fight Chest Rig Mk4/Mk5 clones. Spiritus Systems trademarks, brands, and intellectual property remain the property of their respective owners. Spiritus Systems does not manufacture, sponsor, or endorse this product.

Customer Reviews

Overall rating: 4.9 / 5 from 13 reviews.

Customer photo review of Sidewing S3 (Spiritus Systems)

I dig it. That's the tweet.

James M. 5/5 Verified August 25, 2026

Sidewing S3 (Spiritus Systems)

Was worried because it wasn’t rigid like the “Thing 2” but that turned into. Benefit, and I was able to mount a knife and a kydex rifle pouch to the inside thanks to the platforms features.

Brian R. 5/5 Verified October 10, 2025

Sidewing S3 (Spiritus Systems)

Great nylon product.

Julio M. 5/5 Verified November 30, 2024

Sidewing S3 (Spiritus Systems)

So I am in a long range recon unit where I need to have the ability to lose my body armor and have a lighter yet similar setup for carrying a large pack. The sidewing system allows me to pull may placard and match my PC in a chest rig configuration. I did a lot of research and found this system to be exactly what I needed. Appreciated the support from your staff in answering questions for me. The two sided Molle allows for pouches in the front and mags and radio on the interior. Love it

Chris S. 5/5 Verified August 26, 2024

Sidewing S3 (Spiritus Systems)

Awesome product and awesome company!

Randy B. 5/5 Verified January 29, 2023

Sidewing S3 (Spiritus Systems)

Product is outstanding. I would suggest getting the four panel one though. It wont really make it much bigger and you will have a lot of options. I wish there was an easy way to switch mine out since I got the three panel. Not a knock on this product and my opinion, the product itself is outstanding.

Michael G. 5/5 Verified August 1, 2022

Sidewing S3 (Spiritus Systems)

It fit the Spiritus Systems gear perfectly. There are small gaps, making it easy to attach pouches as well.

Tsuda S. 5/5 Verified July 21, 2026

Sidewing S3 (Spiritus Systems)

Great product, suits my needs. Thought the product was going to be a bit more rigid, but regardless, it is well constructed. Great platform to build out a full size chest rig

Aaron W. 4/5 Verified January 31, 2026

Sidewing S3 (Spiritus Systems)

Excellent product, Excellent service

Alexis S. 5/5 Verified December 14, 2025

Sidewing S3 (Spiritus Systems)

Exactly what I was looking for in a lightweight platform for my Spiritus placard. Highly recommend!!

Greg C. 5/5 Verified January 4, 2025

Sidewing S3 (Spiritus Systems)

The three row side wing was exactly what I needed to make my chest rig quickly compatible to a carrier in one easy move. Thanks Beez for a great piece of kit.

Lloyd M. 5/5 Verified September 24, 2024

Sidewing S3 (Spiritus Systems)

Awesome!

Lavell M. 5/5 Verified November 25, 2023

Sidewing S3 (Spiritus Systems)

Lead time said 6 weeks when I ordered, but item came in a fraction of that time. Great quality, the RG matches other RG products I have perfectly. Seamless integration with SS micro fight rig. Love it will be ordering more

Marcos M. 5/5 Verified September 10, 2022

Sidewing S3 (Spiritus Systems)

Sidewing S3 (Spiritus Systems)

Sidewing S3

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