The Spectrum Defense CO2 is a direct thread only 9mm suppressor that we have affectionately named after a CO2 Cartridge, due to it’s looks. And just like some of the cartridges you can buy at certain stores, this CO2 promotes Gas Retardation as well! Thanks to the Helikil baffle system, this is a great suppressor to pair with direct blow back platforms due to it’s low backpressure nature. Additionally, being 3D printed from IN718 allows for more abuse when compared to titanium, stainless, or aluminum alternatives.