{"id":229243,"date":"2026-01-21T16:40:38","date_gmt":"2026-01-21T22:40:38","guid":{"rendered":"https:\/\/gunsamerica.com\/digest\/?p=229243"},"modified":"2026-01-29T10:14:40","modified_gmt":"2026-01-29T16:14:40","slug":"arc-magazines-thril-shot-show-2026","status":"publish","type":"post","link":"https:\/\/gunsamerica.com\/digest\/arc-magazines-thril-shot-show-2026\/","title":{"rendered":"Thril Debuts New ARC Mags — SHOT Show 2026"},"content":{"rendered":"\n

<\/path><\/svg><\/span><\/span>Estimated reading time: <\/span>4<\/span> minutes<\/span><\/p>\n\n\n\n

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Thril\u2019s new 6 ARC and .338 ARC magazines use caliber-specific geometry and stainless steel bodies to improve feeding in AR platforms. <\/p>\n\n\n\n

This is a solution to a problem that many people have been unaware of. Soon, we’ll have high-quality and reasonably priced magazines that actually function in the 338 ARC and 6 ARC platforms.<\/p>\n\n\n\n

Built Specifically for ARC Cartridges<\/h2>\n\n\n\n

At the Thril booth<\/a>, the focus stayed on one thing: fixing feeding issues with ARC cartridges. Thril introduced dedicated magazines for both 6 ARC<\/a> and 338 ARC instead of relying on modified 5.56 designs. That choice allows these magazines to function as intended.<\/p>\n\n\n\n

\"There
Thril now makes ARC magazines. The 338 ARC magazines are still a prototype, but the SMX 6MM ARC magazines<\/a> are on their website now. These are going to be caliber-specific to 6 ARC or 338 ARC. Naturally, they are not interchangeable with eachother as each is designed to optimize either 338 ARC or 6 ARC for optimal feeding in the AR platform.<\/figcaption><\/figure>\n\n\n\n

The internal geometry matches the ARC case shape. The back rib sits flattened, which lets cartridges stack more naturally. That change reduces binding and nose dive during feeding. The result is smoother cycling, especially under faster strings.<\/p>\n\n\n\n

Thril is currently one of only two companies offering<\/a> true, dedicated 6 ARC magazines (that I’m aware of). If you are one of those shooters who have fought reliability issues because your 6 ARC or 338 ARC won’t feed, this solution is for you.<\/p>\n\n\n\n

Capacity, Construction, and Design<\/h2>\n\n\n\n

Thril<\/a> offers the ARC magazines in 20-round and 27-round capacities. Both versions use stainless steel<\/a> construction. The bodies are stamped, then butt-welded rather than overlapped. That weld choice keeps the internal dimensions as long as possible for those high BC, heavy for caliber, bullets.<\/p>\n\n\n\n

\"Two
These magazines are stamped stainless steel that is butt-welded up front for maximum strength and internal length.<\/figcaption><\/figure>\n\n\n\n

The magazines also include rear spine windows (patent pending). Shooters can quickly check their round count without removing the mag. The windows don\u2019t interfere with structural strength.<\/p>\n\n\n\n

Stainless steel adds durability. It also helps maintain the feed lip shape over time. These mags aim at shooters who run ARC hard, not just for bench shooting<\/a>.<\/p>\n\n\n\n

Why Geometry Matters Here<\/h2>\n\n\n\n

ARC cartridges<\/a> don\u2019t behave like 5.56. The case taper and overall length change how rounds stack under spring pressure. Thril adjusted the internal geometry to match that reality.<\/p>\n\n\n\n

Better stacking equals more consistent feeding. That matters even more with .338 ARC, which pushes heavier bullets. Thril designed both magazines independently instead of sharing a single internal profile.<\/p>\n\n\n\n

\"A
Thril’s ARC magazines have feed lips shaped to aid the cartridge in a smooth transition from the magazine to the chamber. <\/figcaption><\/figure>\n\n\n\n

Pricing and Availability<\/h2>\n\n\n\n

Pricing lands in the mid-to-high $40 range. That puts these mags above standard AR magazines. It also reflects the stainless steel build and low-volume production. However, the increase in reliability for your rifle system<\/a> is probably worth the cost. Especially if you use this rifle to protect your own or others’ lives.<\/p>\n\n\n\n

Thril plans to release both the SMX 6MM ARC<\/a> and .338 ARC magazines in Q3, pending final quality control. For those of you who are like me and don’t know what that means, that is between July and September. Once QC wraps up, they\u2019ll hit retail.<\/p>\n\n\n\n

Where These Fit<\/h2>\n\n\n\n

These magazines target ARC shooters who want consistency. They don\u2019t chase gimmicks. Thril focused on feeding geometry, durability, and proper cartridge support.<\/p>\n\n\n\n

For shooters running 6 ARC, or who are stepping into 338 ARC, dedicated magazines could make or break the reliability of that system. That alone makes Thril’s magazines worth a look.<\/p>\n\n\n\n

Learn more about the 6 ARC and 338 ARC magazines from Thril here<\/a>. The SMX 6 ARC magazines can be found here<\/a>.<\/p>\n\n\n