The 5r has a 24" barrel and is threaded.
Sendero and XCR are 26" barrels and are fluted. XCR 3 larger flutes and Sendero has 6 small ones.
All 3 are 416 stainless.
XCR come factory coated trinyte.
The stock is a bell & carlson on the xcr with a more conventional grip size.
The 5r and Sendero are...