The problems with the P320 are well documented, and Sig's horrible response when called on it is even worse than the original problem. Friends in the industry have reported major flaws in the pistol, in Sig's response, and in the military testing. This is not uncommon with Sig, which is a darned shame, but I can't see any reason to buy the 320 in any variant, or much of anything else from them.
They have a well known and long history of poor QC and even worse responses to being called on that. I can recall reading a long report of such problems with LE issued pistols and poor response from Sig at least 10 years ago. NJSP is in litigation with them right now over defective pistols delivered for an order. When there are so many better options with far better histories and far better response to proven problems, why on earth would anyone subject themselves to the crud with Sig?