This Micro-Switchblock® handguard will only work with our Micro-Switchblock® equipped barrels.
You can find the correct barrel for this handguard here
-Free Float Design
-Featuring M-LOK mounting positions every 45 degrees with picatinny 1913 top rail
-Light weight American made steel barrel nut
-The 9.75” handguard with a 10.5” barrel will return a .080” clearance from end of handguard to barrel thread shoulder. Perfect spacing when you add your favorite suppressor