Yes, it will.
From ProMag web site
Fits Ruger© 10/22© standard carbines*
Quick Break Down design
Unique design allows rapid barrel removal and installation
Patent pending steel adjustable lever toggle V-block clamp
Integrated barrel storage (up to .920" diameter) enables the rifle to be stored in compact spaces
Constructed of our legendary high strength, carbon fiber and glass reinforced black polymer
Full surround, embedded aluminum bed block chassis
Additional buttstock storage areas
Weight: 1.9 pounds
Lifetime Warranty**
Made in USA
NOTICE:
*Does not work with Ruger© 10/22© Takedown models.