Compatible with 0.750” diameter barrels (standard diameter)
Rail height is same height as A4 Flat top upper receivers.
This AR-15 railed gas block from MidWest Industries is made to be installed on AR-15 barrels with a 0.750” diameter gas block step. This size is the standard Ar-15 gas block step diameter found on most AR-15 barrels. However, if you have a bull barrel or a pencil barrel, you likely do not have a 0.750” diameter.
This gas block is held in place via set screws on the bottom of the assembly.
This railed gas block is made from 4140-steel. This steel will be able to tolerate the heat associated with AR-15 gas blocks. Also, this steel is extremely durable and able to handle hard use.
The rail on the top section of this gas block is Mil-Spec, 1913 Picatinny dimensions. The rail height is set to the same height was A4 flat top receivers. This means that you do not have to buy a special gas block height sights. Instead, you can simply buy standard height Picatinny sights to mount on your gas block. However, be sure to by steel BUIS, as the polymer back-up iron sights are not capable of handling the heat associated with the gas block.