xd40carrier

Thanks for the input everyone. This has been a slightly expensive lesson learned. From your shared information and reading on this forum as well as talking with a reputable gunsmith, I am now building 2 rifles. The misses wanted a 5.56, but she is now getting a .308 lol. I have ordered a stripped lower and parts kit From PSA for the upper I already purchased. As for the Aero M5 lower, I have started ordering the parts and pieces from Aero to build up a rifle that is upgradable to my liking. Again, thanks to everyone for their input.

Hi all. I'm new to this forum as well as being new to the AR platform rifle. I've been an avid Hunter for 30 years and have everything from .22 to 7mm calibers (2 rifles Chambered in .308 Winchester), bolt, semi, and lever action. Now I know It was probably a stupid mistake on my part, but I decided on a 308 build for my first AR platform. Now for my question, or my request for advise. I just purchased an Aero Precision M5 lower receiver. Unfortunately I live in a state where I have to wait 10 days before I can take possession. Now, since I am waiting for the 10 days to pass, I started searching for great deals on upper receivers. I found an awesome sale at Palmetto State Armory for a complete Gen 2 upper with BCG, 18" stainless Barrell, low profile 15" MLock handgaurd, and adjustable gas block. The gas system is a mid length system. Got the package for 399 plus tax. So, what I need to know, is this upper and lower combination compatible. My FFL dealer says I should not have a problem, but I am finding mixed info around every corner I turn. Any information is greatly appreciated.