Call DDLES on the phone. They had 3 of the dedicated lowers (Colt SMG mag versions) last week, on their website. I bought all 3. They called me the next day and said that a glitch in the system happened - apparently, someone else was buying one at the same time as me, and checked out just before I did. So, they only had 2 available for me. If I wanted to wait two weeks, they could send all 3. End result - they're sending 2 now, and will send the other one later. They are available, but you'll need to talk to them and make sure when they'll either be online for purchase, or available for phone-in purchase. Honestly, I'd set it up over the phone. Only reason I didn't was because it was after hours, and they were in stock. I didn't hesitate. Lesson 65b.