Just curious why XM5 was using Lancer L7AWM instead of 7.62 PMAG20. Does anyone know inside scoop? Is Lancer mag with steel liner more durable for 6.8mm?

I was thinking Pmag is now USGI for 5.56 so procurement should be no issue. And XM5 uses Magpul SL-K stock, so Sig is also partnering with Magpul on XM5 already.

On the other hand, is Sig going to come up with its own M5 mags? Seems too lucrative of a procurement contract to give out.