Geissele Automatics Intermediate Cartridge Magazine, ICM – 20 Round
Geissele’s Intermediate Cartridge Magazine is purpose-built and designed from the ground up to reliably feed 6mm ARC.
The ICM has an all-stainless steel magazine body, four-way polymer anti-tilt follower, enhanced feed lip and internal magazine geometry. The magazine body is fully laser welded instead of traditional spot welding for increased durability.
Made in the USA.
Specifications
Capacity: 20 Rounds
Caliber: 6mm ARC, 22 ARC and 6.5 Grendel
Material: 410 Stainless Steel Body and Floorplate with Polymer Follower
Finish: Black Body and Tan Follower




Nelson V. (verified owner) –
Mags are great. Now the real review. The greatest customer service ever! Ordered midday, the carrier had my package the same evening, and my purchase was in my hands before the end of the week. Best part is the surprise snack my wife found in the box! I really appreciate ya’ll. New faithful customer who will come here first when needing new parts!
Yuri (verified owner) –
Haven’t been fired yet but loaded and the quality of Geissele speaks for itself. Also cannot say enough good things about Sal and the Sweatshop team. Great product and better customer service.
Jim (verified owner) –
Awesome mags. My (now) goto for all things 6ARC … and 338ARC! Tested with both sub and supers, they run flawlessly in my 338ARC build. Since they are also good to go in my 6ARC, I can justify a higher cost mag since they run double duty. My previous 6ARC mags would not run 338 subs. The fit and finish is top notch, the operation is flawless.. I’m extremely please and will probably grab more. And… probably the fastest shipping on the internet and a free lunch to boot! Cannot recommend both Rooftop Defense and Geissele mags enough.
Leo (verified owner) –
These mags are personally a must have for a reliable way to run a 6ARC. They are expensive with lesser mags you are gonna off set the cost of just buying these after like 5 failures to feed. If u are building a caliber that you are considering this mag then you have already spent a bunch of money on the build. It’s like getting a fancy sports car and putting no name tires on it.