SLR .750 Non-Adjustable Micro Low Profile Gas Block w/.400 in. Set Screw Spacing Black. 750 Non-Adjustable Micro Gas Block w/.400 in. Set Screw Spacing. SLR built these AR15 Lower Parts to prevent corrosion and abrasions and a Melonite finish adds extra protection for these parts. This SLR Non-Adjustable Micro Gas Block w/.400in Set Screw Spacing is precision bored and fits under any AR15 handguard to provide you with an easy-to-install platform for your weapon accessories. Get the SLR GB7 Non-Adjustable Micro Gas Block w/.400in Set Screw Spacing for your rifle to get the power your weapon produces at an extremely high rate. Specifications for SLR GB7 .750 Non-Adjustable Micro Gas Block w/.400 in. Set Screw Spacing: Manufacturer: SLR Size: 0.75 Caliber: .750 Nitro Express 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 GB7 .750 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 GB7 .750 Non-Adjustable Micro Gas Block w/.400 in. Set Screw Spacing What firearm models does the manufacturer say SLR GB7 .750 Non-Adjustable Micro Gas Block w/.400 in. Set Screw Spacing is compatible with? The manufacturer says that SLR GB7 .750 Non-Adjustable Micro Gas Block w/.400 in. Set Screw Spacing is compatible with AR-15SLR GB7: GB7 .750 Non-Adjustable Micro Low Profile Gas Block w/.400 in. Set Screw Spacing Black