ARLINGTON, Va. (AP) -- Alliant Techsystems said Monday that it has completed a $985 million acquisition of Bushnell Group Holdings, which makes binoculars and riflescopes.

Alliant Techsystems, which is known as ATK, is an Arlington, Va.-based aerospace and defense contractor. The deal was originally announced in September. It is buying Bushnell from private equity firm MidOcean Partners.

Bushnell, which is based in Overland Park, Kan., is expected to post revenue of $600 million for the year. ATK expects the deal to add earnings of $1 per share in the 2016 fiscal year.

ATK will integrate Bushnell into its sporting group business, which makes ammunition and shooting accessories for law enforcement and sporting.