AR1 may refer to
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AR-1 (multiple rocket launcher)
The BM-30 ''Smerch'' (, 'whirlwind'), 9K58 Smerch or 9A52-2 Smerch-M is a heavy self-propelled 300 mm multiple rocket launcher designed in the Soviet Union to fire a full load of 12 solid-fuelled projectiles. The system is intended to def ...
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Aerojet Rocketdyne AR1
The Aerojet Rocketdyne AR1 is a thrust RP-1/ LOX oxidizer-rich staged combustion cycle rocket engine project.
The engine was conceived in 2014, and received US government funding to build a prototype engine in 2016. By 2018, the USAF had commi ...
, a rocket engine
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Alba AR1
The Alba AR1 was a one-off experimental open-wheel formula racing car, designed by ex-Osella engineer Giorgio Stirano, and developed and built by Italian manufacturer Alba Engineering; constructed to Formula 3
Formula Three (F3) is a thir ...
, an experimental racing car
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Archaerhodopsin
Archaerhodopsin proteins are a Protein family, family of retinal-containing receptor protein, photoreceptors found in the archaea genera ''Halobacterium'' and ''Halorubrum''. Like the homologous bacteriorhodopsin (bR) protein, archaerhodopsins harv ...
-1, a photoreceptor
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Arkansas's 1st congressional district
Arkansas's 1st congressional district is a U.S. congressional district in eastern Arkansas that elects a representative to the United States House of Representatives. It is currently represented by Republican Rick Crawford. With a Cook Parti ...
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Arkansas Highway 1
Arkansas Highway 1 (AR 1) is a designation for three List of state highways in Arkansas, state highways in east Arkansas. One segment of runs from U.S. Route 278 in Arkansas, U.S. Route 278 (US 278) in McGehee, Arkansas, McGehee north ...
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ArmaLite AR-1
ArmaLite, or Armalite, is an American small arms engineering company, formed in the early 1950s in Hollywood, California. Many of its products, as conceived by chief designer Eugene Stoner, relied on unique foam-filled fiberglass butt/stock furn ...
, a bolt-action rifle manufactured by
ArmaLite
ArmaLite, or Armalite, is an American small arms engineering company, formed in the early 1950s in Hollywood, California. Many of its products, as conceived by chief designer Eugene Stoner, relied on unique foam-filled fiberglass butt/stock fur ...
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IPCC First Assessment Report
The First Assessment Report (FAR) of the Intergovernmental Panel on Climate Change (IPCC) was completed in 1990. It served as the basis of the United Nations Framework Convention on Climate Change (UNFCCC). This report had effects not only on the ...
* , a repair ship of the United States Navy
* Acoustic Research AR-1, an acoustic suspension speaker from
Acoustic Research
Acoustic Research was a Cambridge, Massachusetts-based company that manufactured high-end audio equipment. The brand is now owned by VOXX. Acoustic Research was known for the AR-3 series of speaker systems, which used the acoustic suspension wo ...
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