Only after two weeks of buying my very first handgun( G 17) I just purchased my first piece of my AR 15 a spikes tactical zombie lower stripped receiver. I can't wait to start putting it together( waiting my California 10 day hold). I pretty much know what butt stock and grip I want but I am having a hard time on what trigger assembly to use and what upper receiver to use. I want this build to be a great target gun, hunting and if SHTF be able to take a beating. I'd be really interested in hearing what everyone finds work the best for them.