Starting the plans on a 300 blackout. I like the look of their billet lowers but haven't read many reviews on them. Any info would be helpful.
Maybe a fluke, but I tried to order 2 of their Navy marked lowers (one for me - retired Navy Chief and one from my son-in-law - active duty Navy Chief for his retirement gift from me), but they never replied. I ended up getting a 300 AAC BLACKOUT marked billet lower from KISS Tactical. KISS engraved my name, city, state on mine prior to anodizing (doing a form 1 SBR).
I just compared my receiver to the pictures of the Quentin billet receivers...hmmm...the companies are both in Az, and contour and cut-wise (other than the markings) they appear the same. Maybe that's a coincidence.
Quentin makes them for KISS. I have been a customer of both companies, although I haven't been to the new KISS retail space. Both have provided me with great service and extremely fair prices. Quentin is near my office, so they are my default FFL transfer dealer as well as my NFA engraver. I have also bought several of their receivers since they make them and I figure I would support a small local guy. Especially since I like them. I keep meaning to pick up a KISS version as well.
I have 3 different Quentin receivers and really like them all. I didn't really care for the trigger guard at first, but it has really grown on me. The first is an early (first run #13) billet 5.56 receiver. It is very similar to the current model, although it doesn't have the tension screw (and hasn't been needed), nor does it have the new logo. It locks up extremely tight with the early Vltor billet upper. I built it into an SPR rig with a 18" WOA barrel and it is one of my favorite ARs. I really wished they made their lowers when I did my AR SBR lower. The second 5.56 AR is an upper & lower receiver kit. It is done in the clear anodized finish that I believe they call subdued or tactical grey. I love the color and it goes well with foliage green furniture. I am building up a 6.8 rig with it and really need to post some pictures.
Lastly, I have a AR .308 receiver from them as well. It uses DPMS spec parts and it pretty nice. I have most of the parts to complete a build. I have a POF 20" piston barrel that I am using on this build. I have been told the gas port is a little small for a gas gun, but I am going to run it and then work it as needed.