Part weight is as follows:
SRAM RED XPLR eTap AXS rear derailleur*: 293g
Force XPLR eTap AXS rear derailleur*: 308g
Rival XPLR eTap AXS rear derailleur*: 327g
*without battery
XPLR XG-1271 10-44T cassette: 373g
XPLR XG-1251 10-44T cassette: 412g
There is a 32-35g weight savings (depending on chainring size) using the direct mount chainring vs. a non-power spider plus 4 bolt 1x chainring for each crankset.