1) It has two #10-32 clamping screws with full size heads.
2) It fits under free float tubes.
3) It has lead-in cuts for the roll pin and gas tube to ease in assembly.
4) It has a very sleek profile and weighs only 730 grains.
5) It has a tasteful machined finish with Firebird logo laser engraved.
6) The gas port has a lead-in counter bore.
7) The gas port location for use with free float tubes shoulders on the barrel for precise alignment without handguard cup.