Welcome to the forum.
The biggest issues with PA10 tend to be in the buffer system and gas system. Thankfully, these are not too difficult to diagnose and fix.
You might look over some of the recent PA10 threads to familiarize yourself with the issues so you can be on the lookout for them.
One issue that all 308ARs have in common is that they usually need a lot of lube when breaking in.
I just got these coupons in email and they are for today only. They end at midnight central time.
$10 off $100, $30 off $300, $50 off $500 or $100 off $1000
http://news.primaryarms.com/q/9eJCZ_RmJZOqokJW-ZMhsCdnljDfgSknaLqW1rMotMgp5fCQTLOMjqiEe
I'll have to look at the owners manual. Susan really did buy it. She talked to the guy that sells them (a customer at the shop she works at) and did the paperwork. I just had to agree.
I've got a couple of them in "30 cal" with 4 to a tray. I like them. They are stackable and seem well made. I wonder if they will stack on the 50 cal tray.
Welcome to the forum. You will find the answer to your problems here. Ask your question and listen to the advice and you will be able to shoot your rifle in no time.