Doesn't look like it's into the bore - taper reamer, hammer in tapered pins good n tight, she's like your favorite meth; ugly but gtg.
In the future, a center punch, drill press, and vise make it much easier to put holes in metal right where you want them.
Because SIG is better at sucking some Pentagon officials' cocks.
Also better at making a pistol that fires when dropped, so shit-for-brains LTs have an excuse for NDs.