The coating process is an integral part of the part's design, so if you plan on having your lower engraved as an SBR or with a custom logo, you'll have to return the receiver to MAG to be recoated. They told me the cost would be about $25 plus return shipping for the service.
We saw black and tan samples that looked and felt any other commercial lower, aside from the dramatic weight difference and exaggerated trigger and hammer pin holes. MAG includes longer pins to accommodate the reinforced hammer and trigger pin holes.
Details:
-integrated trigger guard
-reinforced trigger and hammer pin holes
-reinforced pivot pin points
-Available mid-November from Brownell's, through ADS and directly from MAG Tactical Systems
-MSRP $160