The Kahr Arms K820 Handgun Magazine Stainless 9mm 7-Round (UPC 602686040129) is an OEM single-stack magazine designed for use with most Kahr 9mm pistol models. It features a stainless steel magazine body, a 7-round capacity, and a flush-fitting base designed to maintain a compact profile suitable for concealed carry and general defensive use. This factory Kahr magazine is specified to fit all Kahr 9mm pistols except selected full-size and extended-grip models such as the TP9 and T9. Palmetto State Armory+2Buds Gun Shop+2
Model Identification and Compatibility
This magazine is commonly referenced with the following catalog details:
Retailer and manufacturer descriptions specify that this magazine:
Fits all Kahr 9mm models except TP9 and T9. Palmetto State Armory+2Buds Gun Shop+2
Kahr’s own catalog further notes that it does not fit CT9, ST9, TP9, or T9, while being compatible with compact and subcompact lines such as CM9, CW9, K9, MK9, P9, PM9, S9, and E9. shopkahrfirearmsgroup.com+1
This makes the K820 magazine suitable as a primary or spare magazine for a wide range of Kahr 9mm pistols, especially the compact and single-stack concealed carry models.
Construction, Materials, and Heat Treatment
The K820 magazine uses a tube constructed from corrosion-resistant 400-series stainless steel, chosen for its combination of strength, hardness, and resistance to rust in typical carry and range environments. Able Ammo+1
Key construction details include:
This material and heat-treatment combination is intended to help the magazine withstand repeated loading cycles, contact with ammunition, and routine insertion and removal from the pistol’s magazine well.
Capacity, Geometry, and Feed System
The Kahr K820 is a single-stack 9mm magazine with a 7-round capacity, optimized for slim grip profiles and concealment-focused designs:
Manufacturer and OEM listings describe several functional elements:
Follower: A shaped internal follower designed to maintain consistent feeding geometry for 9mm ammunition in Kahr’s single-stack frames. shopkahrfirearmsgroup.com+1
Spring: Internal magazine spring configured to support reliable feeding across the full capacity range, from one to seven rounds.
Witness holes: Side witness holes on the magazine body provide a visual indication of round count at a glance. midwestgunworks.com+1
This configuration supports standard-pressure 9mm loads within the platform’s intended operating parameters, as defined by Kahr Arms.
Baseplate and External Features
Kahr’s product description and several distributor listings note that this 7-round magazine design uses a flush-fitting polymer baseplate compatible with compact Kahr frames: midwestgunworks.com+1
Baseplate type: Flush-fit polymer floorplate
Profile: Designed to sit nearly even with the bottom of compatible Kahr 9mm pistols, minimizing printing and bulk when carried concealed.
The flush baseplate also allows users who prefer the shorter grip profile of compact Kahr pistols to maintain a streamlined configuration, while still having access to a full 7-round single-stack magazine.
Dimensions, Form Factor, and Weight
While exact dimensional data are typically not deeply detailed in catalog listings, the K820 is described consistently as a standard-length, flush-fit 7-round magazine for Kahr compact 9mm pistols:
Form factor: Slim, single-stack, compact length for CW9, K9, P9, S9, E9, and similar pistols. shopkahrfirearmsgroup.com+1
Weight: Approx. 0.14–0.15 lbs packaged weight, depending on vendor listing and packaging. Nimrod's Wares+1
The overall form factor is tuned specifically to Kahr’s single-stack frame geometry and is not intended as a universal 9mm magazine.
OEM Origin and Intended Use
This magazine is marketed as an original Kahr Arms OEM accessory, not an aftermarket reproduction. Able Ammo+1
Typical use cases include:
Because it is an OEM component, its geometry, feed-lip design, and baseplate interface are matched to Kahr’s frame specifications and are intended to provide the reliability associated with factory magazines when used with appropriate ammunition and within manufacturer guidelines.
Compatibility Overview
According to manufacturer and authorized retailer descriptions, the K820 7-round stainless 9mm magazine:
Fits (examples):
Does not fit:
Many reseller titles summarize this as “Fits all Kahr 9mm models except TP9 & T9”, while detailed compatibility notes from Kahr Arms add CT9 and ST9 as additional exceptions. Palmetto State Armory+2Lone Wolf Gun Shop+2
Users should confirm their exact pistol model designation (including frame size and series) before purchasing to ensure correct fit.
Technical Summary
Kahr Arms K820 Handgun Magazine – Stainless 9mm 7-Round
Brand: Kahr Arms
Model / SKU: K820 / K820 PACKED
Caliber: 9mm Luger
Capacity: 7 rounds (single-stack) Buds Gun Shop+1
Material: 400-series stainless steel magazine tube, heat treated to ~50 Rockwell hardness Able Ammo+1
Finish: Stainless (corrosion-resistant) Buds Gun Shop+2Lone Wolf Gun Shop+2
Baseplate: Flush-fitting polymer floorplate
Features: Witness holes, OEM follower and spring, slim single-stack geometry shopkahrfirearmsgroup.com+1
Compatibility: Fits a broad range of Kahr 9mm models (e.g., CM9, CW9, K9, MK9, P9, PM9, S9, E9); not for TP9, T9, CT9, ST9. shopkahrfirearmsgroup.com+2midwestgunworks.com+2
UPC: 602686040129 Buds Gun Shop+2Able Ammo+2
With its 7-round single-stack configuration, stainless steel tube construction, OEM geometry, and broad compatibility across compact Kahr 9mm pistols, the Kahr Arms K820 Handgun Magazine Stainless 9mm 7-Round is a technical, factory-spec solution for users needing a reliable replacement or additional magazine for their Kahr 9mm platform, excluding the TP9, T9, and certain extended-grip variants.
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