Greetings. Thinking about an AR15 build over the next few weeks / months and looking at 2 different lowers. Both are assembled already and are new / like new. One is a DPMS with DPMS internals and Colt A2 stock assy. The other is a Palmetto State Armory (PSA) with PSA internals and commercial adjustable carbine stock. There is about $30 difference in price between them. I haven't had an AR15 in 25 years, so just checking with guys that have more recent experience with these brands. TIA.