Question: What company created the Bushmaster IV?

Context paragraphs:
Compagnie de Saint-Christophe: The Compagnie de Saint-Christophe was a company created and chartered by French adventurers to exploit the island of Saint-Christophe, the present-day Saint Kitts and Nevis.  In 1625, a French adventurer, Pierre Bélain sieur d'Esnambuc, landed on Saint-Christophe with a band of adventurers and some slaves.  Returning to France, in 1626 he applied to and received a charter from Cardinal Richelieu to create the "Compagnie de Saint-Christophe".  Richelieu was a major stockholder in the company, contributing some 10,000 livres out of the company's capital stock of 45,000 livres.  The company was not very successful.  In 1635 Richelieu directed his councilor François Fouquet to reorganize the company under the name "Compagnie des Îles de l'Amérique", French for "Company of the American Islands".  It was charged with colonizing Sainte-Christophe, Martinique and Guadeloupe.

Bushmaster Arm Pistol: The Bushmaster Arm Pistol was a 5.56×45mm NATO firearm, categorizeable as either a long pistol (under the American legal definition of a pistol) or compact carbine rifle, produced by the Gwinn Firearms Company, and later Bushmaster Firearms Inc.The firearm was a new design, having a tipping-block bolt system combined with a long stroke piston system similar to the AK-47 rifle.

Aldred-Rogers Broadcasting: Aldred-Rogers Broadcasting Ltd. was a broadcasting company created in 1959 to launch Toronto's first private television station.  The partnership was made up of media personality Joel Aldred and radio station owner Edward S. "Ted" Rogers.  The station created was CFTO-TV and began operations in 1960.  The partnership was short lived and ended when co-owner Aldred sold his interest in CFTO-TV in 1961.  The company dissolved, but Ted Rogers retained his share and the company forged ahead to become Rogers Communications.

Pepper Tanner: Pepper Sound Studios was an early syndicator of radio station jingles and began sometime in 1957.  It began as a record company created by businessman John Pepper and songwriter Floyd Huddleston.  Huddleston based the company on the model of Capitol Records and even brought in Johnny Mercer as a consultant.  Composers Al Rinker and Willard Robison were hired, until the record end was eventually phased out, and by 1964, Pepper Studios exclusively become a Jingle Commercial company.  Their first jingle was for John Pepper's company Everdry Deodorant, followed by Burke Hall Paint and hundreds of others.  William Tanner was a salesman for the company and quickly weaseled his way into becoming one of the owners of the company, and Pepper and Tanner worked Floyd Huddleston out.  The company became known as Pepper-Tanner about 1967.  In 1972, Bill Tanner worked John Pepper out the same way he had Huddleston, and the name was changed once again to The William B. Tanner Company, or simply Tanner for short.

.30 Remington AR: The .30 Remington AR cartridge was created in 2008 by Remington Arms to fill a perceived gap in performance on large game between the .223 Remington and larger cartridges such as the .308 Winchester.  Design of the cartridge is considered a joint effort between companies under the "Freedom Group" name through a private equity firm and included such companies as Bushmaster, DPMS and Remington itself.  It is a rebated rim cartridge designed to fit Remington's R-15 semiautomatic hunting rifle.  It was designed to fit the dimensional constraints of the AR-15 magazine and is based on a modification of the .450 Bushmaster, which in turn was based on the .284 Winchester.

DNA Solutions: DNA Solutions is a DNA testing company created by biotechnologist Vern Muir B.Sc.  in 1996, and incorporated in 1998.  The company created a home paternity kit in 1997 and has since expanded its services to include DNA sample storage.

CETIN: Česká telekomunikační infrastruktura a.s., (abbreviated CETIN) is a Czech telecommunications company that is part of PPF Group, an international investment group majority-owned by Czech billionaire Petr Kellner.  The company was created as a result of the separation of O2 Czech Republic a.s. into two companies, following a decision taken at O2 Czech Republic’s general meeting on 28 April 2015.  The actual separation took place on 1 June 2015.  CETIN, the new company created alongside O2, now runs the fixed-line access network, the mobile access network and international telecommunication services that were previously run by the combined O2 Czech Republic.

Bushmaster IV: The Bushmaster IV is a 40 mm chain-driven autocannon designed and built by Alliant Techsystems.  The Bushmaster IV is based on the M242 Bushmaster, Bushmaster II and Bushmaster III, all originally developed by Alliant Techsystems.  The Bushmaster IV fires 40×365mm 3P (Prefragmented, Programmable, Proximity-fuzed), APFSDS-T Mk I, and APFSDS-T Mk II rounds.  The 3P round will provide air burst capability and the APFSDS-T Mk II can penetrate in excess of 150mm armor.

Europ Assistance: Europ Assistance is a French company created in 1963.  The company created the concept of worldwide medical assistance.

Alliant Techsystems: Alliant Techsystems Inc. (ATK) was an American aerospace, defense, and sporting goods company with its headquarters in Arlington County, Virginia, in the United States.  The company operated in 22 states, Puerto Rico, and other countries.  ATK's revenue in the 2014 fiscal year was about US$4.78 billion.

Supporting paragraphs: Bushmaster IV Alliant Techsystems
Answer: Alliant Techsystems