The BOSS 5.56mm Standard End Cap for 1.5-inch housings in black (brand part no. EC-150-556-SS-SE-BLK) is a replacement or upgrade end cap sized specifically for BOSS’s 1.5-inch modular suppressor housing in 5.56mm caliber. It is not a suppressor on its own; it is the end cap component that caps off the housing and directs baffle geometry for that specific caliber and housing size. Machined from stainless steel in a standard, non-vented configuration, it gives BOSS suppressor owners a direct-fit replacement part when reconfiguring or maintaining their modular system. This end cap is matched precisely to the 1.5-inch housing diameter, so it will not fit BOSS’s 1.75-inch housings.

Key Specifications

• Sized for 5.56mm caliber BOSS suppressor housings.
• Fits the 1.5-inch housing diameter specifically.
• Uses a standard (non-vented) end cap configuration.
• Machined from stainless steel and finished in black.

Frequently Asked Questions

Is this a complete suppressor? No, it is an end cap component for BOSS’s 1.5-inch modular suppressor housing, sold separately from the housing itself.

Will this end cap fit the 1.75-inch housing? No, it is sized specifically for the 1.5-inch housing diameter.

Buy the BOSS 5.56mm Standard End Cap

Keep your BOSS 1.5-inch housing configured correctly with this 5.56mm standard end cap. Shop more from B O S S Suppressors in our suppressor accessories category, shipped fast from our Lubbock, Texas shop.