Check the listing for details. RMR Mount Super Slim for Glock Double Stack Rear Sight Dovetail 0.157" Saddle. Condition: New. Listed at 16.97 USD. Aluminum Construction - LIFETIME WARRANTY!RMR Mount Super Slim for Glock Double Stack Rear Sight Dovetail 0.157" Saddle.• Precision CNC Machined from 6061-T6 Aircraft Aluminum with a Matte Black Finish• Low Profile 0.157" Saddle Height Positions RMR® as Low as Possible Without Sacrificing Structural Integrity and Performance• Utilizes Locking Torx Screws and Dovetail Insert for a Secure Zero Hold• Includes Installation Hardware and Tools for a User Friendly Installation Requiring No Permanent Modification• Compatible with Glock Double Stack Pistols and Easily Installs into Rear Sight DovetailThe Best Never Rest Warranty - LifetimeLeapers, Inc. warrants that all UTG & UTG PRO products conform to published specifications and are free from defects in material and workmanship. Leapers will repair or replace defective products for the duration of the product's life span. Leapers dedicated in-house customer service professionals will provide the best-in-class UTG experience.NOTES:The warranty does not extend to products disassembled, damaged from misuse, accidental impact, negligence, natural disasters/accidents, or unauthorized repair or alteration.Warranty InstructionsTo submit a warranty case to Leapers/UTG, please follow the following steps:Go to Warranty Request under Customer Service on the website.Fill out the necessary contact and product information to the best of your knowledge.A purchase receipt is required for all warranty cases and needs to be attached at the end of the form.Finalize the case by submitting the information.You will hear from customer service reps within 24-48 hours and they will provide you with additional information and instructions.Please contact Leapers, Inc. with any questions.