The 
StratAIM Echo Blast Cap
 is a reusable, impact-activated sound grenade designed for airsoft and tactical training, producing a sharp 79dB blast upon impact using biodegradable caps. 
 
 
Product Details
Type: Reusable sound/distraction grenade for airsoft and training.
Activation: Impact-activated, with no delay or timer, detonating instantly on contact with a hard surface.
Sound Output: Emits a sharp, startling, but non-damaging ~79dB blast.
Power Source: Powered by green gas and uses proprietary Bio Blastcaps (biodegradable, laminated cardboard caps) to create the sound.
Construction: Built for durability using high-grade CNC 7075 aluminum body, stainless steel internals, and Viton seals.
Portability: Compact and lightweight at just 220g, it is designed to fit standard 40mm grenade pouches.
Compliance: It is a non-pyrotechnic device, making it fully EU compliant and legal for use in most airsoft sites where traditional pyros might be banned.