The handguard will come with all of the hardware to install the rail, but will no longer include the barrel nut wrench as of last year and per Geissele, "Effective 3/31/20 Geissele will no longer include the gas blocks with the rails." The barrel nut wrench and gas block can be found here:
https://www.opticsplanet.com/geissele-barrel-nut-wrench-02-243.html
https://www.opticsplanet.com/geissele-super-gas-block-stainless-steel-05-231.html
https://www.opticsplanet.com/geissele-super-gas-block-black-nitride-coated-05-231n.html