Conceived in the 1950s, Blackbirds remain the fastest and highest flying air-breathing production aircraft ever built. In 1959, Lockheed’s chief engineer Kelly Johnson and his team submitted an unsolicited proposal to the U.S. Air Force for a Mach 3+ reconnaissance aircraft.

The M21 sniper weapon system (SWS) in the US Army is a national match grade M14 rifle, selected for accuracy, and renamed the M21 rifle. [7] . The M21 uses a commercially procured 3–9× variable power telescopic sight, modified for use with the sniper rifle. [8] . It is chambered for the 7.62×51mm NATO cartridge.

2024年9月23日 · The Web Automated Reference Manual System (WARMS) includes manuals, directives, and handbooks. The publications provide information about the Department of …

2020年3月31日 · The M21 is a classic sniper rifle built during, and for, the Vietnam war where it served with great distinction. We provide a history of the XM21 and M21 system here.

The BM-21 Grad is a Soviet truck-mounted 122 mm multiple rocket launcher. The weapons system and the M-21OF rocket that it fires evolved in the early 1960s and saw their first...

2019年9月12日 · Not only was a relatively unknown US Army Staff Sergeant the highest scoring sniper in Vietnam, but he did it with a semi-automatic M21. Credited with 109 kills Staff Sergeant Adelbert Waldron proved an M14 based sniper rifle could run with the USMC’s Model 70 Winchester target rifles and newer Remington M40 sniper rifles in actual combat.

2021年9月10日 · A Lockheed M-21 Blackbird variant with its D-21 drone mounted on the spine. The aircraft is the latest subject of Randy Malmstrom's Warbird Profile series. (image via Wikipedia)

22 December 1964: At Groom Lake, Nevada, a Lockheed M-21, a special two-place variant of the Central Intelligence Agency’s A-12 Oxcart Mach 3 reconnaissance aircraft, took off for the first time while carrying a D-21 drone. The pilot was William C. Park, Jr., Lockheed’s Chief Engineering Test Pilot.

The M-21 is a variant of the A-12, the earliest Blackbird type. Built for a CIA program code-named “Tagboard,” the M-21 carried unpiloted drones for intelligence gathering.

Samsung Galaxy M21 Android smartphone. Announced Mar 2020. Features 6.4″ display, Exynos 9611 chipset, 6000 mAh battery, 128 GB storage, 6 GB RAM, Corning Gorilla Glass 3.