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The one-round war: USMC scout-snipers in Vietnam. Flayderman's Guide to Antique American Firearms and Their Values. Utilizes all 4 of the base mount screw holes on the receiver. Front of the base overhangs the barrel by 2 3/4', overall length is 8 1/2'. Stalkers and Shooters: A History of Snipers. Del: My Unertl BV20 includes the receiver extension base mount you are speaking of, set-up on a short action Rem. Crosshairs on the Kill Zone: American Combat Snipers, Vietnam through Operation Iraqi Freedom. Very sophisticated optical/mechanical instrumentation for government.MST-100 10× for 7.62×51mm (Used by the Marine Corps, FBI & Canada).Hunting Scopes "Falcon", "Hawk" & "Condor", 2 3/4×, 4× & 6× respectively.The last John Unertl, John Robert Unertl, after leaving the company worked his way up to Division President of the optical instrument division of Leitz.
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And while the company was well known for its rifle scopes, it’s major revenue came from high end optical systems made for various branches of government including very sophisticated optical/mechanical instrumentation, optics for military jet gunsights, fire control optics, and wind tunnel instrumentation ( Schlieren photography systems for the Naval Surface Weapon Center in White Oak, MD). started the company and ran it until his death. There were actually three successive "John Unertls". John Unertl founded the John Unertl Optical Company in 1934 and the company manufactured military sniper scopes during World War. By 2008 the company had closed its doors. By 2006 the company had begun marketing firearms in addition to their line of scopes including a civilian copy of the Marine Corps MEU(SOC) pistol and the M40A3 Sniper Rifle. In the early 2000s the Marine Corps began phasing out Unertl Scopes in favor of other scopes like the Schmidt & Bender 3–12×50 Police Marksman II LP. Rocky Greene) and the headquarters was moved to Las Vegas, Nevada. In 2002 the company was purchased by 21st Century Technology, Inc. The company was most notable for its MST-100 (7.62mm) and MST-150 (.50 caliber) 10× scope used by the USMC Scout-Sniper program and the first scope to use a Mil-Dot reticle.
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Unertl optics becoming recognized as the leader of precision rifle optics in the shooting world. His attention was more on the large optics of astronomy, while Unertl and Lyman continued to make developments and take much more of the market share. John Unertl founded the John Unertl Optical Company in 1934 and the company manufactured military sniper scopes during World War II. An even John Unertl always attended and mingled with shooters.