Hello Sig experts, I have a question about the locking inserts in 2 MK 25's I own. My 1st MK 25 is a black one produced in 6/16 and it has a MIM locking insert, the 2nd one is a Desert produced in 10/16 and it has a milled locking insert. Is this normal or is one of them incorrect. Both pistols were purchased new. Thank you in advance.

I noticed this as well. My 2015 MK25 has a MIM one, and the newer production ones at my shop have milled ones.