i would stick to a good anti-seize. the very heavy "gooienes" / viscosity of the product is important. when the product loses this and turns into a hard waxy surface (like a dry lube) it loses its effectiveness and should be replaced.
the ONLY place anti-seize should be used in the system is at the points in which the unlock block and barrel lug interfaces. this area is subject to extremely high pressure and temperature. utilizing a grease or anti-seize in other areas will result in a sticky feeling slide, and lackluster performance.
failure to utilize the correct type of product in this area will result in poor performance, including FTFs and FTEs, as well as galling of the barrel and unlock block surfaces.
failure to utilize the proper type of product in this area can result in a voided warranty.
i HIGHLY recommend against experimenting with products on the XR series. ESPECIALLY if the pistol is being used for defense, at home or on the street!
GONRA sez (again & again): Moly Kote MoS2 "G" paste does the trick.
You can't do better..... (But its dirty.)
alternety sez (again & again): not true. You can do better, and both are dirty.