AAC’s new 300-SD suppressor Posted February 16, 2010 in NFA / Suppressors / Class III, Rifles by Steve Johnson with 3 CommentsTags: .300, .308, AAC, rifle, rifles, suppressor, Suppressors The new 300-SD for .300 Win. Mag. and .308 Win. is a baby version of the .338 LM TiTAN-QD. Unfortunately civilian sales are on hold until military contracts have been fulfilled. By the way, AAC are advertising for an assembler position.