If you have a Ruger AR556 with an A2 front sight gas block the Range Tool AR15 E-line Handguard will not be compatible. You would need to remove the front sight gas block and replace it with a low profile gas block.
It's it will work. All you have to do is remove front sight and barrel nut and install the 7.25" model. Put new barrel nut and your old front sight and you are g2g