2A Armament, 875 Internal Bore Gas Block 4140 Steel - Black

2A Armament .875" 4140 Black Steel Gas Block

The 2A Armament 2A-STGB-3 gas block is made of 4140 steel for barrels with a .875" gas block seat. The low profile design limits bulk and allows for mounting under many handguards, while the black finish protects the component and maintains a discreet appearance.

It is secured by two set screws, an essential solution that facilitates installation and maintenance. This steel version replicates the profile of 2A Armament titanium gas blocks, prioritizing robust construction.

Key Features

• Internal diameter: .875"
• Material: 4140 steel
• Low profile
• Sandblasted surface with black phosphate coating
• Secured by two set screws
• Color: black

Recommended use

Suitable for assembly and replacement on AR platforms with barrels designed for .875" gas blocks. Before mounting, check barrel diameter, gas port alignment, and available internal space under the handguard.

Manufacturer code: 2A-STGB-3