Description
ASC's .308 magazines earn their reputation through solid construction and real-world performance. Built from .032 gauge 410 stainless steel and heat treated for strength, this 20-round magazine handles the abuse that comes with serious shooting. The stainless construction won't swell in heat or crack in the cold, unlike polymer alternatives, making it especially valuable for rifles that get used in varied conditions.
Marlube Finish and Reliable Feeding
The proprietary Marlube coating is worth explaining because it actually improves with use. Rather than wearing off like paint, it's a wear-in finish that burnishes into the steel surface, providing self-lubricating properties that help rounds feed smoothly. You get chrome silicon springs paired with an anti-tilt polymer follower designed to keep ammunition stacking correctly and moving up the feed ramp without binding.
Built for Handloads and Extended Sessions
If you reload, this magazine is optimized for your loads. The interior dimensions measure 2.865 inches overall length (plus or minus .002), giving you the room you need for both standard ammo and hand-assembled rounds. Twenty rounds means longer stretches at the range before changing mags, and the quality construction means this mag will still be feeding flawlessly years from now. The floor plate is machined from 410 stainless steel with a matte black powder coat, matching the magazine body for a clean look.
Made in the USA
The entire manufacturing process happens start to finish in the United States, using robotic precision and ASC's quality standards. This is a magazine you can depend on for duty use, range training, or match shooting.
Key Specifications
- Caliber: .308 Winchester / 7.62 NATO
- Capacity: 20 rounds
- Material: 410 Stainless Steel Alloy
- Gauge: .032
- Finish: Black Marlube coating
- Follower: Black anti-tilt polymer with PTFE
- Spring: Chrome silicon
- Floor Plate: 410 stainless steel, matte black powder coat
- Interior OAL: 2.865 inches (±.002)
- Compatibility: SR-25 and DPMS LR-pattern AR-10 receivers
- Heat Treated: Yes
- Corrosion Treatment: Chemical treatment per QQ-P-35
- Manufacturer Part Number: 20-308-SS-BM-B-ASC
- UPC: 818805010496
- Manufacturing: 100% USA-made
- Weight: Approximately 0.5 lbs
What’s Included
- One ASC 20-round .308 stainless steel magazine
Frequently Asked Questions
Will this magazine work with my AR-10 platform?
This ASC magazine is specifically designed for SR-25 and DPMS LR-pattern AR-10 receivers. It works well with most standard builds on these platforms, though it's not compatible with Aero Precision M5 lowers or Armalite AR-10B rifles. If you have an AR-10 built on a DPMS or SR-25 pattern, this magazine should function reliably.
What makes the Marlube finish different from other coatings?
Marlube is a wear-in coating rather than a wear-off finish. It actually gets better with use because it burnishes into the steel surface and creates self-lubricating properties. This means your magazine will keep performing smoothly the more you use it, unlike typical paints or coatings that degrade over time.
Are these magazines good for reloaded ammunition?
Yes. The interior dimensions are optimized at 2.865 inches overall length to accommodate both factory and hand-loaded rounds. Many reloaders prefer ASC magazines because the precise dimensions and quality construction ensure consistent feeding whether you're using standard loads or your own custom ammunition.
Why choose stainless steel over polymer magazines?
Stainless steel won't swell in hot conditions or crack in freezing temperatures, making it more reliable in extreme climates. The metal construction is also more durable when exposed to corrosive environments or rough handling. While polymers are lighter, the robustness and longevity of quality stainless magazines often justify the added weight for serious shooters.





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