Spiritus Systems The Thing 3 Airsoft Chest Rig Build Breakdown
OptimusPrime
18 Apr 2026
PaSSive Shoot and BLKFOX feature an assembly of a chest rig for airsoft use based on the Spiritus Systems The Thing 3 in Multicam. The host begins by sharing the history of the brand, noting it was founded by two US Army veterans who were tired of using gear that didn’t quite work for them. While the brand emphasizes functionality over looks for actual field use, the host admits that for airsoft, looking cool is at least half the battle.
The assembly process is a mix of tactical precision and the occasional old man grunt while bending over to reach pouches. The host adds various components like the Micro Fight Chassis Mk5, pistol mag pouches, and different-sized GP pouches to create an asymmetrical layout. There is also a candid discussion about "Asian fit" issues, as American-made harnesses are often built for much larger frames, leading to a DIY session where the host has to trim excess webbing just to make it sit right.
By the end, the rig is fully kitted out with everything from magazine inserts to a specialized multi-tool and even some practical items like wet wipes and plastic bags for dirty laundry. PaSSive Shoot concludes that while the minimalist military concept is great, the joy of airsoft is spending your hard-earned money to build something that makes you happy. Even if that means carrying three grenades just for the aesthetic, it's all part of the fun.