budget AR ? To me this means a decent amount of saveings. building vs buying of course you need to compare apples to apples. Your build has to replicate what you thought you might by.
For the most part its tough to build a standard off the shelf AR for much less than buying one. Example is the S&W M&P sport and its like competitors.
My least expensive AR I built was a A2 configuration its my FrankenAR. Here is a few things I learned when trying to do anything budget
1. Shipping, you need to watch this buying 5-10 different items from different sources increases total cost. Free shipping or one source shopping keeps this cost down
2. Sometimes used parts are fine
3. Ask anyone that might remotely have guns/gun parts sometimes you knock peoples memory loose and they say "you know I have some parts kicking around for a AR I used to have"
4. There seems to be some great deals on uppers right now, you must shop around.
for some of the least expensive "KITS" try AR15sales.com out of NH pete has some great prices on stag RRA LMT.
Heres my run down on my A2 AR budget, prices include shipping
1. Group buy lower 75.00
2. LPK group buy 49.00
3. used A2 stock/tube/spring 30.00
4. Stripped A2 fixed handle upper 40.00 original owner swapped out to flat top
5. I took a chance on a add from AR15.com simply said slighty used rifle length AR barrel 5.56 nato, replaced it with heavy target barrel and tube.
I called the number and the seller said, Im not one to have spare parts lying around, aprox 500 rnds through it. 150.00 shipped. I bit
What came was a complete barrel assembly hand guards and all. 150.00
6. I purchased a used rear sight assembly which someone swapped out for a National Match set up 25.00
7. Bolt assembly, this is where asking people "got gun stuff" comes into play I asked and ended up with what looked like a never fire bolt assembly for ZIP,NATA, ZERO......who hoo
I snaged a charging handle and dust cover parts on some other online parts place Jessurplus I think for another 30 bucks
I had to buy a new gas tube and a few small items, spacer was missing for stock. in the end I was under 500.00 but it took me about a year to aquire all the parts.
Now moving on, I look into building a AR to copy the Rock River Arms National Match A2 model. I could not build one for the price I could buy a complete rifle for.
I did how ever build a clone of the S&W MP tactical for aprox 400.00 less than buying one