The PMA free float keymod rails are exactly what you need to complete your project rifle. This style of KeyMod Handguard is a lightweight free floating handguard featuring a continuous Mil-Spec 1913 Picatinny rail. The rails themselves come in 7", 9", 11" and 15" to meet all of your requirements. Constructed out of 6061 T6 Aluminum and hard coat anodized for superior finish and strength. The light weight design can support lights, sights, lasers, and all other accessories you need. Unlike other after market rail systems these line up perfectly with your upper receiver. The quality and price come together for the best combination of value and style. The inside diameter is 1.3" to fit most gas blocks and muzzle devices.

Fits Modern Sporting Style Rifles
Material 6061 T-6 Aluminum
Length 15 Inches
Interior Diameter 1.41"
Outer Diameter 1.58"
Weight 6.1oz
Finish Anodized Black
Free Float YES
Includes Free Float Rail, Steel Barrel Nut, 3 Steel Screws
Warranty Limited Lifetime

100% Made in the USA