The Align Tactical® THUMB REST LOCKING BLOCK PIN is compatible with Canik® Rival/Mete/TTI® series polymer pistols with [ SQUARE RECESS ] in frame ONLY (NOT TP9 Series, nor TP9 SUB METE, or Mete MC9 Micro-Compacts ). Hardened S7 tool steel part finished in Black Nitride. Approved for the NEW USPSA Limited Optics division as well as, Limited, Limited 10, and Open. Made in USA with lifetime warranty.

NOTE: Rival-S steel frame forgings vary in feature dimensions/tolerances and may either be a drop-fit or require fitting of the anti-rotation stop by a gunsmith. *Legacy TP9 Series are not an option due to design limitations. -- New TTI Combat (Taran Tactical Innovations) may be a perfect drop-in fit or have a hair of play due to slight differences in frame tolerances. Can easily be shimmed rock-solid with a sliver/shaving of any material placed between a side wall of the frame recess and the anti-rotation stop during insertion.