SLR GB7 .750 Non-Adjustable Micro Low Profile Gas Block w/.450 in. Set Screw Spacing Black. 750 Gas Block w/.450 in. Set Screw Spacing is a high-quality gas block for those looking for something other than the standard plastic block. Whether you're looking for a replacement or you want to build your own from the ground up these Rifle Gas Blocks by SLR are the perfect gas block for your needs. The small profile and ultra-durable SLR GB7 .750 Nitro Express Gas Block fits easily under any AR15 handguard to give shooters extra clearance while enhancing your gun's overall performance. When you want a gas block that won't let you down make sure you choose the SLR GB7 .750 Non-Adjustable Micro Gas Block w/.450 Inch Set Screw Spacing. Specifications for SLR GB7 .750 Non-Adjustable Micro Gas Block w/.450 in. Set Screw Spacing: Manufacturer: SLR Coating: Melonite QPQ Finish Size: 0.75 Caliber: .750 Nitro Express Gun Make: AR Platform Gun Model: AR-15 Additional Features: w/.450 in. Set Screw Spacing Gas System Type: Direct Impingement Features of SLR GB7 .750 Non-Adjustable Micro Gas Block w/.450 in. Set Screw Spacing: .450 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/.450 in. Set Screw Spacing What firearm models does the manufacturer say SLR GB7 .750 Non-Adjustable Micro Gas Block w/.450 in. Set Screw Spacing is compatible with? The manufacturer suggests that SLR GB7 .750 Non-Adjustable Micro Gas Block w/.450 in. Set Screw Spacing is compatible with AR-15SLR GB7-450: GB7 .750 Non-Adjustable Micro Low Profile Gas Block w/.450 in. Set Screw Spacing Black