I own one.

The lower cracked at the flat spot above the stock threads/buffer tube.

The pins connecting the upper and lower loosened also.

I bought it for my daughter as it is very light. I have since cut a new billet lower (from an 80% I bought..wink wink) had it cerakoted...etc. Now, I have replaced the trigger group, upper through barrel, bolt carrier..a whole new rifle really.

It does now weigh a bit more but is still manageable.

The crack/pin problem happened after about 90 rounds were put through it.

The POF the other poster mentioned is a much better setup.

I wouldn't buy another