Superlative Arms Clamp-On Adjustable Gas Block .875-inch Stainless

The Superlative Arms Clamp-On Adjustable Gas Block .875-inch Stainless from Superlative Arms (brand part no. SABO-DI-875CS) is a .875-inch adjustable AR-15 gas block designed to regulate how much gas reaches the bolt carrier group. It secures around the barrel with a two-piece clamp-on band, so installation does not require drilling, dimpling, or pinning the barrel.

Key Specifications

• It is sized for a .875-inch barrel gas-block journal, so it only fits AR-15 barrels machined to that exact outside diameter.
• It mounts with a two-piece clamp-on band around the barrel, requiring no drilling, dimpling, or pinning.
• It is machined from stainless steel.
• It has a stainless finish.
• The gas port is fully adjustable, letting the shooter dial in exactly how much gas is diverted to cycle the bolt carrier group.
• Superlative Arms builds this block around its bleed-off gas system, which vents excess gas downstream rather than restricting flow at the block, the same approach the brand uses across its adjustable gas block line for suppressor and full-auto-rated reliability.

Frequently Asked Questions

Will this fit any .875-inch AR-15 barrel? It is machined for a barrel gas-block journal that measures exactly .875 inches in diameter, so it will not fit barrels machined to a different journal size.

Why choose an adjustable gas block over a fixed one? An adjustable gas block lets you dial back excess gas, which is especially useful when running a suppressor or switching between supersonic and subsonic ammunition, both of which change how much gas the system needs to cycle reliably.

Does installing this require gunsmithing? No — the clamp-on band secures around the existing barrel contour, so it does not require drilling, dimpling, or pinning the barrel the way some solid gas blocks do.

Buy the Superlative Arms Clamp-On Adjustable Gas Block .875-inch Stainless

Buy the Superlative Arms Clamp-On Adjustable Gas Block .875-inch Stainless through our Rifle Parts catalog at Schaefer Defense and we’ll get it shipped fast and fully insured from our Lubbock, TX gun shop.