The SIG SAUER Buckmaster 1500 Laser Rangefinder and 4-16x44mm Riflescope does not offer parallax adjustment.
The SIG SAUER Buckmaster 1500 Laser Rangefinder 4-16x44mm Riflescope 8 caliber settings group similar trajectory. The 8 groups can be found at the link below.
https://www.sigsauer.com/media/sigsauer/resources/21SIG3350-BUCKMASTERS-1500_Manual_7403205-01-R01.pdf
This SIG SAUER Buckmaster 4-16x44mm Rifle Scope features a 30mm tube. The product page is currently being updated.
The SIG SAUER Buckmaster 1500 Laser Rangefinder 4-16x44mm Riflescope will not display range in the scope. You are thinking of the Sig Sauer BDX system, in which the rangefinder and scope can be paired together. Those systems also don't display the range in the scope itself, but will instead provide a hold mark/dot after lasing a target. You can find a BDX combo linked below:
https://www.opticsplanet.com/sig-sauer-bdx-combo-kit-kilo1000bdx-lrf-and-sierra3bdx-riflescope.html