My mistake, I got my Lance and Blazer turrets mixed up. It was the Lance that I was talking about.Not sure what the Blazer turret is you mention - I'm assuming it's not the old 25mm air defence turret for LAV.
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Medium calibre turret integration on Namer and the Israeli factor make it an outside chance for Land 400 Ph 3. Although if Namer is offered by a different prime (US, UK) for instance that may alter perceptions as the contract would consequently not actually be with an Israeli firm.
This may actually be one reason for General Dynamics delay in announcing their contender. Rheinmetall would be reluctant to offer them the Lance turret as it would assist GD bid against their own Boxer.
The turret is probably the weak spot for GD. The MCT-30 (apart from being ugly as sin) has apparently been tested with ATGM but I don't know of any images of how it comes together.
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Regarding the Namer, it's only now that GD is producing some in the US that it would be a viable option due to the politics of buying from Israel.