Info posted by Glenn Seekins (Seekins Precision is making these uppers and lowers): Our 308 platform will be based off of the SR25 in some ways and our own in others. There is no "standard" for the large platform and im so sick of dealing with the sloppy standard of the ar15 these will come with allot of our own parts. They are compatible with dpms style bolts (and possibly armalite). Im not even going to attempt at making them fit other uppers/lowers because of the machining conflicts. I will offer uppers at a cheap enough price that if you wish you can swap out the existing upper you have as well as sell lowers separately with you understanding they will only work with our upper. This is going to be more of a platform to build from, not a logo kit like the 15's are. Kits will be available sometime this spring. I am working the logistics out right now. Just installed a new cnc before we left for shot and tomorrow will be looking at another manufacturing center. I will have more info on lead time around the end of the week. SP lower 7075 billet- hard anodized black sp take down pins (stainless) sp ambi mag release (complete mag release) sp dual action bolt control (complete bolt catch) sp captured buffer retainer All you need to complete the lower is a trigger, trigger pins and safety selector. We should have both here to sell you a complete lower if you choose, but only with good stuff. SP upper 7075 billet - hard anodized black sp billet port door forward assist (optional) DPMS or Armalite bolt/extension compatible. Not sure yet as we have our own bolt carriers in the making, still undetermined. If i can, i will make it work with both. I will have two different forend rails available with upper/rail sets that do not use the barrel nut to mate together. Hard to explain, bit its the cats ass when it comes to a stiff and accurate upper. One quad rail like the SAR rail we distribute thru spikes tactical. Super light weight, Titanium barrel nut. The other is a triangle shaped rail geared for 3 gun and competition shooting. It will also be light weight and may have some carbon fiber mixed in with it. Retail 650$ for the upper/lower kit. Rails TBD _________________________ Glen Seekins glen@seekinsprecision.com