Can't say for sure but the stamp for my SBR took just over six months from the time I mailed it in (25 May 11) until the time I got the stamp in the mail (27 Dec). The process may have been delayed somewhat because of the holiday season - the actual approval date was about two weeks before I received the letter in the mail - but that seems the norm for most class III stamps these days.
__________________ "... Americans... we want a safe home, to keep the money we make and shoot bad guys." -- Denny Crane
still waiting my dealer told me today that he has not got one back for two months
Is sending in a least five a week and nothing is coming back so I do not have a timeline my first came back in two months. this one he told me at least five months has been three but would like it if if you got one in update your wait time so we have some idea