Lancer Systems Mcx Carbon Handguard Carbon Fiber - LCH-MCX-105. These AR Handguards & Forends by Lancer Systems use cooling slots in the composite tube to easily attach M-lok accessory rails. The Lancer Systems Sig Mcx Carbon Fiber Factory Handguard features cooling slots so you can attach your favorite sights or bipod and not have to worry about reinstalling the handguard. Get the Lancer Systems Sig Sauer Carbon Fiber Handguard for Sig Sauer MCX to get the best look for your Sig Sauer MCX. Specifications for Lancer Mcx Carbon Fiber Handguard: Length: 10.5" 12" 18" Package Contents: Lancer Mcx Carbon Fiber Handguard The Lancer Mcx Carbon Fiber Handguard is a quality addition to the Lancer Systems lineup. For more great deals on Rifle Handguards by Lancer Systems please browse our Lancer Gun Parts page. What firearm models does the manufacturer say Lancer Mcx Carbon Fiber Handguard is compatible with? The manufacturer says that Lancer Mcx Carbon Fiber Handguard is compatible with SIG Sauer MCXLancer Mcx Carbon Fiber Handguard - LCH-MCX-10.5