CMMG ZEROED Ambi Magazine Catch and Button Kit - Black - 55AFF89
Product Description
Upgrading a modern sporting rifle, defensive carbine, or precision AR-15 build for high-velocity indexing and dynamic tactical transitions introduces an immediate mechanical and physical bottleneck: standard right-hand-only mag catches. Factory mil-spec setups require left-handed operators to completely break their primary firing grip to strip a magazine, while forcing right-handed shooters to execute complex hand-over-hand manipulations during administrative clearing or off-hand support tracking drills. These delays add critical split-seconds to your reloading timeline. The **CMMG® ZEROED™ Ambidextrous Magazine Catch and Button Kit** completely eliminates these handling limits, packaging a rugged, dual-sided manual release engine built straight to match-grade structural tolerances.
Precision-engineered as part of CMMG’s elite ZEROED line of premium components, this ambidextrous upgrade brings smooth mechanical tracking straight to your receiver's lower control suite. The primary magazine catch arm is CNC-machined from high-tensile, heat-treated carbon structural steel to prevent any warping or flexing when running heavy, loaded polymer or steel magazines. The left-side release lever features an optimized geometric pivot profile that slashes manual input force while staying flush against the lower receiver walls to shield against clothing snags. To ensure an unyielding layer of defense against corrosive trail sweat, environmental humidity, and harsh chemical cleaning solvents, the steel components are treated with a rich, deep black Melonite finish.
In high-stress self-defense scenarios, intensive range training blocks, or rapid multi-gun stages, the advanced ergonomics of the 55AFF89 kit provide a massive weapon-handling advantage. The package features a specialized, oversized right-side magazine button extension molded from aircraft-grade aluminum and wrapped in a matching black hardcoat anodized jacket. This button is machined with deep, high-traction **linear texturized grooves** that stop wet fingers or heavy winter gloves from slipping off-target when dropping a mag. Driven by a high-tension mil-spec compression spring, this premium factory upgrade secures your ammunition stack while opening up true dual-sided manual authority on your bench.
*Armorer Bench Notes & Technical Installation Guidance: The CMMG ZEROED 55AFF89 kit features a direct-fit drop-in mechanical design, allowing it to install seamlessly into any standard mil-spec pattern **AR-15 or M4 aluminum lower receiver housing**. When initiating installation on your workbench, thread the right-side button onto the mag catch shaft just enough to catch the threads. Next, utilize a polymer punch or a non-marring tool to depress the right-side button deep into the receiver cavity; this will protrude the left-side catch arm clear of the opposite wall, allowing you to manually rotate and clock the catch bar flush into the receiver's matching recess slot without scratching your lower's finish. Screw the assembly down until the threaded shaft sits flush with or slightly below the surface face of the right-side button. Thoroughly check functionality with empty aluminum and polymer magazines on your bench to verify crisp click-in lockup and smooth drop-free extraction tracking before hitting the firing line.
Key Features
- True Ambidextrous Control: Adds a functional, low-profile mechanical release paddle to the left side of the receiver, giving both left- and right-handed shooters dual-sided magazine dropping speed.
- Heavy-Duty Melonited Steel Catch: The core catch arm is CNC-machined from hardened steel and treated with a black Melonite shield to permanently resist wear and cross-axis twisting.
- Oversized Grooved Aluminum Button: Furnished with an extended right-side aluminum button featuring deep texturized linear channels to lock down traction under slick conditions.
- Flush Anti-Snag Profile: Geometrically contoured to rest low and tight against the receiver, keeping the controls safe from accidental vehicle or body-armor snags.
- Complete Core Upgrade Package: Arrives factory-bundled with the ambi catch arm, texturized button cap, and heavy-duty compression spring under one single part code.
Product Specifications
- Brand: CMMG
- Model Line: ZEROED™ Premium High-Performance Firearm Enhancements
- MPN/SKU: 55AFF89
- UPC Code Profile: 810046234839
- Firearm Platform Focus: AR-15, M4, AR-556, and Universal Mil-Spec Lower Receivers
- Caliber Versatility Matrix: Caliber Agnostic (5.56 NATO, .223 Rem, .300 BLK, 6.5 Grendel, etc.)
- Catch Body Composition: CNC-Machined Heat-Treated Structural Carbon Steel
- Button Cap Composition: Aircraft-Grade Structural Aluminum
- Catch Exterior Treatment: Advanced Corrosion-Resistant Black Melonite Finish
- Button Exterior Treatment: MIL-SPEC Type III Hardcoat Black Anodization
- Manual Control Interface: Dual-Sided (Left-Hand Paddle / Right-Hand Linear Texturized Button)
- Included Internal Spring: Heavy-Duty Mil-Spec Piano Wire Compression Spring
- Net Component Mass: 0.85 Ounces (Featherweight Action Rigidity)
- Country of Manufacture: United States of America
