I am new to the forum and to AR's.
I purchased my AR-15 about 12 days ago. The first time at the range, unknown by me, I shot about 60 rounds threw the gun before finding out I should clean and lube gun before use. I was told it needed to be cleaned/lubed well by a AZ Ranger...
I do not know much about ARs, and I have never owned one before. I have a chance to buy everything but a Lower for a very reasonable price. Will any lower work? The current owner had it all built on a Magpul lower.