SLR .875 Non-Adjustable Micro Low Profile Gas Block w/.400 in. Set Screw Spacing Black. 875 Non-Adjustable Micro Gas Block w/.400 in. Set Screw Spacing to ensure you get the power your rifle needs while also preserving its finish and quality. SLR built these AR15 Gas Blocks with a melonite finish for enhanced corrosion resistance that will make these gas blocks last a lifetime. The SLR GB8 .875 Non-Adjustable Micro Gas Block w/.400in Set Screw Spacing is precision bored to fit under any AR15 handguard and the coating ensures this part performs in any environment or weather conditions. Equip the SLR GB8 .875 Non-Adjustable Micro Gas Block w/.400in Set Screw Spacing to your rifle build for a reliable gas system that will improve your shot performance. Specifications for SLR GB8 .875 Non-Adjustable Micro Gas Block w/.400 in. Set Screw Spacing: Manufacturer: SLR Coating: Melonite QPQ Finish Gas Block Journal Size-Diameter: .875 in Gun Make: AR Platform Gun Model: AR-15 Additional Features: w/.400 in. Set Screw Spacing Condition: New Gas System Type: Direct Impingement Features of SLR GB8 .875 Non-Adjustable Micro Gas Block w/.400 in. Set Screw Spacing: .400 inch Set Screw Spacing. Precision bored. Fits under any AR15 handguard. Included Accessories: Set screws and roll pin Package Contents: SLR GB8 .875 Non-Adjustable Micro Gas Block w/.400 in. Set Screw Spacing What firearm models does the manufacturer say SLR GB8 .875 Non-Adjustable Micro Gas Block w/.400 in. Set Screw Spacing is compatible with? The manufacturer says that SLR GB8 .875 Non-Adjustable Micro Gas Block w/.400 in. Set Screw Spacing is compatible with AR-15SLR GB8: GB8 .875 Non-Adjustable Micro Low Profile Gas Block w/.400 in. Set Screw Spacing Black