Buy the Blitz front. Get a set of feeler gauges and find one or a combination that fits in the space between the front sight and the housing. Then tighten as needed. Your sight will be perfect. Honestly I am kinda amazed you sent the gun back for that. Plenty of us have straightened the front post. They put them on quick at the factory and the tolerance is a little wide. Simple 1 minute fix. If you are having other problems that’s different.