Sylvan Arms

Specifically designed for gas piston and direct impingement systems 5.56 to .308 systems, as well as .223 compatible, it has standard 1-3/16” x 16 thread and does not require any additional parts to be used with standard BC Groups. It is CNC-machined in the USA from 7075 Billet Aluminum, making it uniquely lightweight and corrosion resistant. This assembly weighs only 6.0 ounces. No special tools required only a standard armorer’s wrench. The product does not need to be disassembled in order to install it on to your rifle/pistol. Simply screw on, fold, and carry! SPECIFICATIONS • Fit: platforms .223/5.56 to .308 & most 9mm:– 9mm bolt carriers with 5/8 ID (.625) standard sizing can use the bolt extension included, after removing the pin and weight from the bolt carrier– 17/32 .531 bolt extension for smaller bolt carriers is available here– If your PSA bolt carrier is causing the bolt extension to come up short contact us for a conversion.-Does NOT work with Silent Capture Buffer Springs.-Does NOT work with JP Enterprise Buffer Systems.-Adds nothing to length of pull.• Surface treatment: hard coat black anodized• Material: 7075 CNC-machined billet Aluminum• Thread specifications: 1-3/16″ X 16• Hinge dimensions: 3 11/16 inches• Hinge weight: 6.0 oz, BC – Extension 2.2 oz• Hinge length: 1.3 inches• Warranty: limited lifetime Designed, built, and assembled in the USA [Download Manual]