"Auto-Mag pistols, calibers .44 AMP and .357 AMP, mfg. and/or assembled by Auto-Mag Corporation, TDE, OMC"
is C&R by ATF definition. See "SECTION II: Firearms Classified As Curios Or Relics Under 18 U.S.C. Chapter 44" (page 18 of PDF):
http://www.atf.gov/publications/down...-p-5300-11.pdf