--- title: "ARISAKA DEFENSE MCX Zero Retention Clamp Sig MCX MI Standard Blk" canonical_url: "https://www.kygunco.com/product/arisaka-defense-mcx-zero-retention-clamp-sig-mcx-mi-standard-blk" meta: author: KYGUNCO "og:image": "https://cdn.kygunco.com/assets/products/264752/thumbnail.jpg?v=1729256577" "og:image:height": "500" "og:image:width": "500" "og:title": "ARISAKA DEFENSE MCX Zero Retention Clamp Sig MCX MI Standard Blk" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Shooting](https://www.kygunco.com/category/shooting) / [Gun Parts](https://www.kygunco.com/category/shooting/gun-parts) / [Handgun & Rifle Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts) / [Rifle Parts](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts) / [Rifle Attachments](https://www.kygunco.com/category/shooting/gun-parts/handgun-and-rifle-parts/rifle-parts/rifle-attachments) / RSK-ZRC-MI-300-SLIM ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/264752/main.jpg?v=1729256577) For illustration purposes only, this image may not be an exact representation of the product. # ARISAKA DEFENSE MCX Zero Retention Clamp Sig MCX MI Standard Blk $49 ** 4 interest-free payments of **$12.25** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Flat Rate $13.94 for every 25 lbs. Shipping to HI & AK may incur additional fees. ** Ships To Your Home Handled by our expert shippers in Bardstown, KY. Item # 264752 Style RSK-ZRC-MI-300-SLIM UPC 850036188384 Condition New Manufacturer [Arisaka Defense](https://www.kygunco.com/brand/arisaka-defense) Weight 2 lb The Patented Arisaka zero retention clamp (ZRC) is designed to effectively mitigate zero shift for lasers and iron sights mounted on handguards. Not compatible with the Rattler, the MCX Virtus and Spear LT handguards lack adequate upper receiver security, allowing noticeable flex when minor pressure is applied. This flex can cause a significant shift of 5 mils or more while the rifle is shouldered, with the zero occasionally failing to return to its original position once pressure is released. Comprising exterior clamps that thread into a specialized U-bracket, the Arisaka ZRC engages the extended upper receiver beneath the handguard. This mechanism tightly secures the handguard to the upper receiver along two axes, effectively minimizing or completely eliminating zero shift. Crucially, the U-bracket avoids contact with the barrel or gas system, thereby preserving the free-floated barrel configuration. ZRC clamps are expertly contoured to minimize interference with the user's hands during handguard grip, ensuring optimal comfort and control. ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## More from Arisaka Defense ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/arisaka-defense-mcx-zero-retention-clamp-sig-mcx-mi-standard-blk#webpage","@type":"WebPage","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"ARISAKA DEFENSE MCX Zero Retention Clamp Sig MCX MI Standard 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