The DD BCG is good to go. Yes, you can retrofit a piston system later...but I'm willing to wager that you won't need it.

 

third time is the charm.

 

Bushmaster also makes piston uppers or a drop in piston kit

then there is Spike's.

 

Thanks for all your help. I ordered that upper, DD BCG, and a BCM charging handle.

Time to start looking at some lower receivers, internals, and stock options. lol anything you wanna recommend in this section?

 

can't legally own an ar in cali, move to LA we give you a gun when you buy a fifth of jack

 

Here is my Delton out of South Carolina. Pretty basic stuff with a flat top receiver, quad rail, rubber trigger grip and vertical grip. The best, and most simple thing I would suggest is getting a good mag (Heckler&Koch in my case) that has a follower that stays in the same position all the way down the mag well. The cheap surplus mags are crap.

 

Have you been reading calguns.net as suggested? There's even a nice little assault rifle pdf flow chart on calguns. The repercussions of having a contraband assault weapon are immense. Know the laws.

I think Kaiser Defense makes great lowers. Good price, great machining, and made in San Diego, California.

And the Raddlock is the one to get IMO. It's easy to use normally, and quick to change to rimfire or out-of-California mode.

I am a big fan of the Geissele trigger. I have the SR, but would definitely get the DMR for a fun gun. They are pricey but feel amazing.

Stockwise, make sure the fully collapsed setting has an overall length of 30" or longer. Again, know your laws.

 

BTW, posting from a Blackberry sucks...webz down at work for up to a week! Congrats on buying the upper and a proper BCG. When you get around to optics, try Aimpoint's Micro line. For.mounts/rings, you can't do better than Larue. Also, you can't beat Magpul for everything from rail covers (XTM's rock!), stocks (a UBR would be perfect on your middie build), and if "Kali" fixes their laws, buy as many PMAG's as you can afford. Finally, get a decent BUIS from Troy (folding) or Larue (fixed).

Post pics when you get a chance. I'm doing the same build as my next project.

 

Thanks for chiming in even through the phone. Sorry I'm new to this stuff. what is are PMAG's? and I assume BUIS is a type of stock? lol I'm not worried about optics and accessories yet... I want to build a really nice lower. I just bought this lower because it'll work for now and it was a great deal. I have to go though a FFL for the lower, so I want ot get the right one. Also I want a great triggger. In other words, I don't have the best upper at this point, but I wan a nice accurate gun at the end, so I want the lower and internals to be very good. I'm sure I'll be happy with the DD BCG, heard great things about their quality.

I'll post pics as soon as the stuff ships. I know some of these parts get stuck for a while...

 

Thanks. I have been reading, but I know there is a lot more to read! I will look for the pdf flow chart, and check out the parts you recommended.