Still in the box - RISE Armament AR-15, 6mm ARC, 18in Complete Upper Receiver

I’m just reviewing it from calls and research. I was going to order a barrel and bolt plus everything to build a complete upper but instead went with this Rise. I would have liked it to come with an adjustable gas block since I’m going to run a suppressor on it, might not be an issue. With the gas block being pinned I’m not sure how much work it’s going to be to replace it and get the new one to align up with the hole. It’d be nice if they had a direct replacement part that would just be a quick fix without having to buy a new adjustable gas block then have it machined for the pin hole on this upper. Talking with Rise about some of the possibility of the bolt breaking since it’s a thin walled bolt to accept the larger case, I was informed that they’d replace it under the lifetime warranty.