The SiG 553P I bought last January, dropped the the form 4 in the mail on 1/31/13 and got my stamp 12/02/13.

For compliance parts I had picked up an 556-DMR lower as well as a stripped 556 lower that will take the folding stock that I'd planned on switching the FCG over to ... now I'm not so sure.

A poster on another form gave me heads up the other day that I'd only be able to use Pmags, because regular AR mags won't lock in ... I have plenty of Pmags and I really like the DMR trigger ... and to be completely honest I'm not big on rock-in mags although the SiG ones are the best if that's what your going to do, and I have a few of those too.

Anyway, here's the way she sits now ... the difference in feel between my 556P-SBR and this one is amazing, it just ooozes smooth