Troy’s .875 Low Profile Gas Block is made specifically for bull barrel rifles that have a 0.875 gas block seat and Armalite 0.308 heavy barrel and other calibers. Machined from 4140 pre-hardened steel finished with MIL-STD Manganese Phosphate. Gas tube roll pin not included.

Technical Specifications:

• Weight: 1.38 oz.
• Length: 1
• Material: 4140 Steel
• Finish: Parkerized