Harris Engineering Number 5 Studs Fits Colt Ar-15. OpticsPlanet Inc is an Authorized US Distributor for Harris Engineering Bipods. Fits Colt AR-15 round handguard without alteration. Sling swivel included. Specifications for Harris Engineering Number Studs Fits Colt Ar-1 5: Manufacturer: Harris Engineering Additional Features: Bipod Adapter Gun Make: Colt Gun Model: AR-15 Package Contents: Harris Engineering Number Studs Fits Colt Ar-1 5 We offer the complete line of Harris Engineering Bipods. For our complete selection of products by Harris Engineering on sale please visit our Harris Engineering page. For more Bipod Accesories please visit our Bipod Accesories store section. What firearm models does the manufacturer say Harris Engineering Number Studs Fits Colt Ar-1 5 is compatible with? The manufacturer says that Harris Engineering Number Studs Fits Colt Ar-1 5 is compatible with AR-15Harris Engineering Number 5 Studs Fits Colt Ar-15