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The Area 419 Plus 4 Mag Extension in Olive adds real capacity where it matters. This isn't a generic rectangular block bolted to your magazine. Area 419 engineered the attachment rail at an angle that mirrors your magazine's pocket, so the column of rounds travels straight down into the extension instead of fighting misalignment. That engineering difference matters for reliability when you're running +4 or more rounds.
This extension works with ARC 10-round magazines, AICS and Accurate magazines in both 5 and 10-round capacities, and Accurate magnum mags for standard bolt face or SAUM/WSM configurations. Actual capacity gains depend on your cartridge, typically ranging from +3 to +5 rounds depending on the magazine and caliber you're running. Note that it won't work with fixed floorplate AI AW magazines or polymer designs. If you're using MDT metal magazines, they work well but MDT recommends pairing with their spring kits for optimal feeding.
The fluted sides pull double duty, creating a solid grip point for mag changes while shaving weight compared to solid blocks. Installation is straightforward, just sliding on to the magazine and securing with the included screw. Users in competition environments report flawless feeding with everything from 6GT to .308, and the extension smooths out spring tension issues on oversized mag loads, making them easier to load and seat.
This extension fits ARC 10-round magazines, AICS and Accurate magazines in 5 or 10-round capacities, and Accurate WSM mags for both standard bolt face and magnum configurations. It does not work with AI AW fixed floorplate magazines or polymer designs like Magpul AI mags.
You'll typically gain +3 to +5 rounds depending on your specific magazine type and cartridge size. ARC 10-round mags often gain the full +4 or +5, while AICS and Accurate mags may gain slightly less depending on how the cartridge seats. Area 419's angled attachment rail keeps the rounds feeding straight, maximizing what you can actually use.
No, it's simple. The extension slides onto your magazine and locks down with a single included screw. Most users report the install takes just a few minutes with basic tools.
Magazine pockets have a slight angle at the bottom, and Area 419 cut their attachment rail to match that angle. This keeps your round column aligned straight as it feeds into the extension, which is critical for reliable feeding, especially when adding extra capacity. Other rectangular extensions don't account for this, which limits how many rounds they can safely add.
| UPC | 850002933215 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 419-MAG-EXT-OLIVE |
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