Federal authorities seized more than 1,200 firearms and nearly 2 million rounds of ammunition when they raided New Deal Shooting Sports, a family-run gun shop south of Deming, last month as part of a multi-agency investigation into illegal gun sales and smuggling. The tally of weapons seized was laid out in search warrant documents filed this week in federal court after the warrants were executed on the gun shop owner’s home and shop between Aug. 30 and Sept. 2. The accounting of weapons and ammunition filled nearly 100 pages. Affidavits for the warrants also describe conversations in which confidential informants...