BOSS End Cap Features The Boss Suppressors End Cap is machined from stainless steel to withstand the repeated thermal and pressure stress that builds up inside a suppressor over sustained firing. This standard configuration is built to keep the suppressor s baseline sound and function performing as the factory intended. The black finish matches factory Boss suppressor coloring keeping a completed build visually consistent. Compatibility is limited to 1.5 inch diameter Boss suppressor housings chambered in 9mm so fitment is straightforward for owners of that specific line. Because this is a direct factory-style replacement part installation follows the same process as the original end cap it replaces with no modification to the suppressor body required. Stainless steel was chosen for its corrosion resistance which matters given the carbon fouling and moisture exposure that suppressor internals experience over time. Owners running 9mm pistols through a compatible 1.5 inch Boss suppressor gain a durable way to keep their can performing as intended. This end cap is a practical maintenance component available for sale at GrabAGun. BOSS End Cap Specifications Manufacturer: BOSS Color: Black Material: Stainless Steel Caliber: 9mm Compatible Hosts: 1.5 Boss Suppressor Models Available At: GrabAGun