Olympic Arms is THE WORST mainstream AR15 gun you can get. The problems with those guns runs the gambit.
I can email you my collection of OLY horror stories if you want a laugh. I literally would NOT take an OLY for free.
I wouldn't touch either of those guns with a ten foot pole. There's tons of examples of LWRCi guns having to go back... Pat Roger's batch, etc.
They've even failed on the Military Channel shows. I watched the goofball from LWRC hand cycling every round on one of the shows.