Description
When you're running a big-bore cartridge like .338 Lapua Magnum, the magazine matters just as much as the rifle. This MDT AICS-pattern magazine holds 5 rounds and is machined from high-strength steel, then finished with Cerakote Elite for real corrosion resistance and a tough, matte black look that shrugs off field abuse. The tempered steel spring and anti-tilt polymer follower work with precision feed lips to push those long, heavy rounds up smoothly every single time.
What Sets This MDT 338 Lapua Magazine Apart
MDT builds these with a Double Stack to Single Feed transition design, which keeps feeding consistent and reliable under pressure. That's a big deal with a cartridge as stout as the .338 LM, where sloppy feeding can cost you a shot on a game animal or a stage. The follower resists tilt so the last round chambers as cleanly as the first.
Fitment Notes for the AICS 338 LM Mag
This is the 3.850" CIP-length version, with a maximum cartridge overall length of 3.760". That extra room is handy if you run longer loaded rounds or handloads. Before you order, double-check your setup: most MDT long-action chassis use a 3.715" magazine well unless the description says CIP or 3.85. It drops into any AICS-pattern chassis or bottom metal cut for the 3.850" CIP length, so it'll play nice with a wide range of long-action builds.
Bottom line, this is a serious piece of kit for anyone running a .338 Lapua rig. Grab a couple of spares so you're never fumbling with reloads mid-string, and you'll have magazines that outlast plenty of rifles.
Key Specifications
- Manufacturer: MDT
- Model: AICS Magazine
- Manufacturer Part Number: 102089BLK
- UPC: 990482720148
- Caliber: 338 Lapua Magnum
- Capacity: 5 Rounds
- Color: Black
- Finish: Cerakote Elite
- Body Material: High Strength Steel
- Spring Material: Tempered Steel
- Follower Material: Polymer, Anti-Tilt
- Magazine Length: 3.850" (CIP)
- Max Cartridge OAL: 3.760"
- Pattern: AICS
- Fitment: AICS-pattern chassis and bottom metal cut for 3.850" CIP length
What’s Included
- MDT AICS 338 Lapua Magnum 5-round metal magazine
Frequently Asked Questions
Will this MDT 338 Lapua magazine fit my chassis?
This is the 3.850" CIP-length version, so it fits any AICS-pattern chassis or bottom metal cut to accept that longer magazine well. Keep in mind most MDT long-action chassis come with a 3.715" magazine well unless the description notes CIP or 3.85. Check your chassis or rifle spec before ordering to make sure it accepts the longer length.
How many rounds does the magazine hold?
It holds 5 rounds of .338 Lapua Magnum. That capacity is based on magnum cartridges, which run long and fat, so 5 is the sweet spot for this AICS-pattern body.
What is the magazine made of and how durable is it?
The body is high-strength steel, nitride-finished and coated with Cerakote Elite for serious durability and corrosion resistance. Inside you get a tempered steel spring and an anti-tilt polymer follower. It's built to take a beating in the field and keep feeding reliably.
What is the maximum cartridge overall length for this magazine?
The 3.850" CIP version accepts a maximum cartridge overall length of 3.760". That gives you a little extra room compared to the standard 3.715" body, which is helpful if you shoot longer loaded ammo or work up your own handloads.





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