PTR Industries Vent Spiritus Features The PTR Industries Vent Spiritus uses 3D-printed Inconel construction to withstand extreme heat cycling a material choice that keeps the suppressor s internal geometry stable even under the stress of sustained hard-use fire. VENT s Purposely Induced Porosity technology manages propellant gas more efficiently cutting back pressure that would otherwise blow excess gas back toward the shooter s face and disrupt a sight picture during rapid strings of fire. A 1/2x28 direct-thread adapter to 1.375x24 HUB ships with the suppressor giving owners broad mounting compatibility across different host rifles and quick-detach systems without needing a separate adapter purchase. This suppressor requires a minimum 10.5-inch barrel when used on 5.56x45 ensuring safe and reliable operation within the pressure and gas-flow limits the design was engineered around. Beyond 5.56x45 the Vent Spiritus also supports 5.7x28 and 4.6x30 platforms with no barrel length restriction extending its usefulness across multiple calibers and host guns for shooters who run more than one platform. Its compact 6-inch length and 1.625-inch diameter keep the suppressed rifle s overall length and weight manageable for maneuvering in tight spaces whether that is a vehicle a doorway or a crowded range bay. The HUB-compatible mounting system allows fast attachment and removal without re-zeroing between mounts so the same can travels between hosts without a trip back to the bench. Rated for limited full-auto bursts of 120 to 180 rounds followed by a 10-minute cool-down the Vent Spiritus is engineered to shed heat efficiently rather than fail under it. Built for hard-use shooters this suppressor balances heat resistance weight and mounting versatility in one compact package suited to duty training and range environments alike. PTR Industries Vent Spiritus Specifications Brand: PTR Industries Model: Vent Spiritus Type: Suppressor Caliber: 5.56 NATO Size: 6 Diameter: 1.625 Color: Flat Dark Earth Material: Inconel Finish: Cerakote Mount: 1/2x28 Direct Thread to 1.375x24 HUB Weight: 15.2 oz Available At: GrabAGun