Product Info for SIG SAUER Pro-Cut 4.7in Slide Assembly. Factory replacement PRO-CUT Slide Assembly for the P320 Full-Size 9mm FDE. Unlike 3rd party slide upgrades, this item does not void your P320 warranty. This slide is for 9mm barrels only and is not compatible with .40, .357, or .45. Jan 19, 2019 · 6 hours ago, CHLChris said: I On the Sig site I noticed the new X-Compact clearly indicates that the slide cut will accommodate the Romeo1 and 3 and the DP Pro. So the page actually says it fits the Romeo 1T, Romeo 2, and DPP. The 1T hasn't been released, and I haven't seen a Romeo 2 announced... The plot thickens..