casual shooter

Armed Eye Doc.... thank you.

Sorry Mega Arms was bought out a few years ago by Zev technologies and they don't have information available for the MATEN. Mega Arms Taking precision to the next level Mega Arms history begins when Mega Machine was purchased in 1984. It was formerly known as Parrot Machine Shop which was founded before the turn of the 20th century. Mega Arms was born out of Mega Machine Shop and became a stand alone independent company moving to a new facility in 2014. From facilities in Centralia and Tumwater, Washington, Mega Arms serve clients from the aerospace, heavy-equipment and firearms industries. Since 2017 also known as ZEV Technologies which designs and manufacturers upgrade accessories for pistols. https://www.brownells.com/rifle-parts/receiver-parts/receivers/upper-receivers/ar-308-maten-billet-upper-receiver-prod113018.aspx

What lower works with mega arms maten upper?