First, when using iron- or back-up sights—I added Daniel Defense’s fixed sight system, ... Before moving to the 100-yd. line, I swapped iron sights for a Nikon M-223 2-8X 32 mm riflescope.

In addition to iron sights in SIG-compatible dovetails, the Daniel H9 has a slide cut for attaching optics through an adapter plate system. Daniel Defense brings the H9 into the 2020s with a slide ...