Armourer's Gunsmithing vise block fits:
Ruger 10/22 Rifles
Securely holds rifle using the magazine well. Camps into 2 1/2+ bench vise.

This Is a helpful third hand while cleaning and assembly of external components and adjusting optics.
 (vise frame and firearm shown for reference and not included)
Intended to be used as a bench support tool, not intended for bench shooting.
Not intended to hold rifle while turning threaded barrel attachments.

Designed and made in the USA with USA materials.
The Armourer's Tool Box