Lancer's replacement handguards for SIG Sauer rifles come in two different lengths: carbine and extended. The carbine-length rail measures 7.25 inches in length and weighs in at 7.9 ounces. The extended rail measures in at 13.1 ounces and weighs 9.8 ounces. An added feature of the SIG 516 and 716 rails is a cutaway in the top of the composite tube that allows for easy access to the gas block adjustment knob.
The Heckler & Koch 416 replacement handguard reduces the weight of the handguard component 24 percent over the factory-installed option. The handguard is a free-float design that incorporates an aluminum sight rail and end cap with a carbon-fiber body. The sight rail is designed to match up with the 416 upper receiver.
The suggested retail price for the SIG Sauer replacement handguards is $274.99 for the carbine-length option and $299.99 for the extended option. The H&K 416 replacement handguard retails at a suggested price of $362.57.