The .50 caliber in question was the RN-50 from Serbu Firearms, Inc. This Tampa, Florida based company is one that I have a great deal of respect for. The founder Mark Serbu is a mechanical engineer that is best know for producing the BFG-50: a .50 BMG caliber, single-shot rifle. Serbu Firearms produces high-quality firearms that are either: cool, unique affordable and specifically engineered to stick-it-to-the-man. The RN-50 accomplishes all four.
Steiner
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A .50 BMG for Everyone: Serbu’s Lightweight, Single-Shot RN-50 — Full Review
Published: July 26, 2017 { 26 comments }
Steiner Binoculars w/ Six Kilometer Rangefinder and Bluetooth — SHOT Show 2017
Published: February 7, 2017 { 3 comments }Steiner has made very high-end optics for the military for a very long time, but I haven’t seen a lot from them on the civilian side. That ends now.