I put this together from a 10/22 CRR and a conversion kit from Scottwerk LLC ( 1022FunGun.com | Home of the 10/22 Fun Gun! - 1022FunGun.com ). It's a great kit, well made and easy to assemble, the only thing I felt it needed was an adjustable rear sight, so.... Here it is after adding a custom fit WGRS adjustable rear sight plus a taller front and a USGI Carbine sling. This is the rear sight... I may remove the aperture and go ghost ring, but if I do, it'll need a thicker post front sight... XS makes one, just haven't decided yet.