Shamayim, your carrier is just like mine. Machining lines between the bearing rails, on the upper body rails between the gas key and the rear circle, also on the front flat platform under the gas key. I suspect they are using DPMS carriers, but supposedly they are making their own. Still, as long as the contact surfaces are smooth, I guess that is all that is important. However I got the chrome job because I wanted ease of cleaning, and the machining grooves defeat some of that. None of my other carriers are so rough, and supposedly my SE carrier was touted as a MATCH carrier (got it from Brownells). The gas key bolts were not staked on, but I had them staked.
Not to go off thread, but for comparison sake I have comments on other B/BC assy's I have:
Les Baer: AR-15 match carrier, extended ramp, longer rear circle but shorter than M16, heaviest out there I think, awesome quality/detail.
Colt: Fantastic
Bushy: Great
Armalite: Great
KAC SR-15 Match: Chrome and like the Les Baer it's awesome, though the rear is cut shorter but still longer than standard I think.
LMT: Beyond awesome, it's the next level.
S.E.: Old one I have is okay, new match chrome unit I have has much machining marks but operationally okay.