Rem 870 18" Mag Ext Kit Park

The Remington 870 18" Mag Ext Kit Park is a +2 magazine tube extension designed to increase the ammunition capacity of Remington 870 12-gauge shotguns. This kit adds two rounds to your magazine tube, a practical upgrade for operators who require higher round count without changing the core platform. The extension ships complete with the spring and tube assembly, requiring only basic installation to the existing magazine tube.

Built with Parkerized finish, the extension delivers corrosion resistance suitable for field duty and extended storage. The Parkerized coating is a standard military specification finish that provides reliable protection against moisture and salt exposure—critical for law enforcement and field operators working in varied environments. The kit is manufactured in the USA, ensuring quality control and sourcing consistency. Installation is straightforward on Remington 870 models, maintaining the shotgun's reliability without modification to the receiver or other critical components.

This upgrade suits patrol officers, tactical teams, and shotgun enthusiasts seeking to extend their 870's operational capacity during training or deployment. The two-round increase addresses the common need for higher magazine capacity while preserving the 870's balance and handling characteristics. For users running 870 shotguns in duty or home defense roles, the magazine extension removes the need to reload as frequently during extended training sessions or tactical scenarios where additional rounds provide a practical advantage.

The Remington 870 remains one of the most widely issued and privately owned pump-action shotguns in North America, making aftermarket capacity kits like this extension a proven, cost-effective way to modernize an existing firearm. The 870 platform's modularity and parts availability make it a natural choice for operators building or upgrading duty weapons.