by Devereaux Tue Jun 23, 2015 1:25 am
TJ. Note the theme that runs through the above comments. Lowers are a commodity. Cheap is good. Avoid what was said above. Widners (?sp) has LRB's from time to time that are excellent and cheap. These are the people that make THE best M14 competition frame - complete with a rear lug.
If you go this route, look for the individual parts. You will find a "parts kit" that has everything, but you will end up with extra stuff that you don't use as you go to something "better". I am a HUGE FAN OPF Geissele triggers - have them on all 3 lowers. They come in the expensive version (about $200 +), or the "cheap" version (about $170). The difference is that the more expensive one is individually proofed and serialized. But the process is the same.
The overall process isn't cheaper, but the parts you put in are what you want. So, you get the ambi safety you want, you put in the bolt release and a MagPul extension (very handy IMO). You can even put in differing springs to hold the two main pins (and idfferent pins to make it a bit easier to pull down without snagging). You can get the pistol grip you want (and you won't want the "stock" one). You can get a bit crazy and get the Vltor 7-positioin tube, associated spring and buffer, and stock, vs the more common (read cheaper) adjustable one.
I think the SINGLE most important thing on building a lower is the trigger you use. See if you can try a couple before springing for one.
You will need roll pin starters and punches - straight and roll pin. There is a nifty set of springs by Badass I believe, complete with magnets to aid in their installation (and thus the avoidance of lots of invective).
I bought 2 complete uppers and build one from scratch. The uppers were Sig 516 piston and YHM DI. The build was a Vltor upper with a Wilson .300 BLK barrel and a YHM freefloat handguard - which I would not use again as it is rough on your hand. I use either YHM or Troy BUIS that pop up; they are metal, vs the MagPuls which are plastic. When (if) you go about getting parts, get extra pins and spring and a couple tubes and roll pins for them. These are things that can and do go bad on the range and are handy to be able to replace. If you're untra- super- paranoid about reliability, pin your block and flash; if you're like me, don't bother. I don't think it adds much other than hassle.
Go back and find the thread I think I started that ran pages and pages. All KINDS of things brought up there. Buy a couple of the lowers - they are a commodity, and you will be able to retrieve your money whenever you want.