The HERA ARMS HLS is a rigid MilSpec flat-top upper receiver made to fit all AR15/M16/M4 rifles and carbines. The HLS was developed to give the customer a MilSpec correct upper receiver with a thicker wall making the HLS upper receiver a more rigid platform.

A more rigid upper receiver will increase accuracy and reliability while extending the life of interfacing components such as the bolt carrier group and barrel assembly. The main benefit of the HLS is it is dimensionally correct. With the HLS, you will receive the best and highest quality upper receiver available on the market today.

All HLSs feature a MilStd-1913 scope mounting rail.

It doesnt include the Foward Assist Handle or the ejection port cover.