The ShapeShift Appendix Holster, designed to fit compact Rock Island Armory 1911 model, delivers a reliable, low-profile appendix inside-the-waistband (AIWB) carry solution built for comfort and retention. Featuring a single-point mounting design, this holster allows the CoolVent™ neoprene backing to flex with your torso, adapting to your movement throughout the day. The custom-molded shell is engineered for a secure, form-fit around your Rock Island 1911, helping reduce printing and maintain deep concealment. A proprietary retention system within the holster shell holds your pistol firmly in place, eliminating shifting or sliding while holstered. The adjustable passive retention allows you to fine-tune the draw resistance, giving you complete control over carry feel and responsiveness. Compatible with the ShapeShift Modular Holster System, this appendix rig allows you to use the same shell across other carry platforms like OWB paddle, belt slide, and shoulder holsters—enhancing adaptability without compromising safety or draw consistency.