Ammunition Storage Components Stainless Steel .308 Win Magazine - 20 Round

SKU: 20-308-SS-BM-B-ASC
MPN: 20-308-SS-BM-B-ASC
23 Reviews

Out of Stock

NOTE: Limit 10 per household. Quantities exceeding 10 will not allow checkout.

Magazines considered High Capacity are controlled by the ATF and/or local jurisdictions are not available for purchase/shipment in all areas.



Ammunition Storage Components .308 Win / 7.62 NATO DPMS/SR-25 pattern magazine is a high quality, exceptionally reliable magazine designed specifically for the popular .308 Win cartridge. Manufactured entirely in the United States of America using 0.032 gauge 410 Stainless Steel Alloy using cutting edge robotic manufacturing techniques and finished with ASC's proprietary Marlube finish. Marlube is a wear-in coating that burnishes the surface and provides self-lubricating properties for further enhanced reliability. These quality magazines feature interior dimensions with an over-all length of 2.865" (+- .002"), making them ideal for handloads.

Note: Not compatible with Aero Precision M5 lowers

  • 20 round capacity
  • Stainless steel body
  • Marlube finish
  • Black follower
  • Great for hand loads
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BrandAmmunition Storage Components
Caliber Gauge.308 Win
Magazine Capacity20
Manufacturer.Ammunition Storage Components
PlatformAR-308/AR-10 Magazines

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Don't buy them so I can have more lol.

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Love these mags. If you load COAL over 2.830" they work perfectly but they do need some individual file work to fit your particular platform.



These are JUNK, JUNK, JUNK!!! I bought 3 10 round magazines and 1 20 round magazine for the AR-10. NONE of them worked. The ammunition would stay inside the magazine because the tilt followers would hang up. Never again.

Bad follower. Good magazine.


Bad follower. Wishing they would make a better follower because I like steel mags. Took it apart and the plastic follower seems like it tilts in the mag. If the follower was more cup like or more like a p-mag follower they’d work great.

Mags that don't work

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Bought some of these mags wood not work until I cut the edge off the front of the mags


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You want your rifle to look OG? These are for you.
<br>You want your rifle to look OG and feed? These are not for you.
<br>Some people get these to work with mods, if you wanna take that chance, gopher it. I'm not one for re-engineering finished products.
<br>Shipping was superb though, thanks PA.

Do not feed reliably

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These mags do not feed reliably in my gen 2 PA-10. Rounds seem to get stuck on the front lip of the magazine and only feed a few rounds before jamming again. I tried contacting ASC but they didn't seem to care, will avoid their products from now on. Pmags function perfectly.

Tinker's Choice

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These mags have a great build quality...However, there finishing touches have much to be desired...1. would not hold in PSA lower...little filing fixed that...2. front lip too high and scraping copper off bullets(85gr. and 129gr. 6.5mm)...more filing...3. mag lips too narrow and rubbed on my $350 BCG...again filed to fix...after final filing they worked flawless...there's better for the same cost and the always flawless P-Mags...but for someone on a tight budget and does not mind a little fitting..these WILL work great.....ASC...COME ON AND GET YOUR SH** TOGETHER....PA...thanks for always being the BEST source for parts and the BEST customer service and shipping...Now...Just need one of those new 3x18 PA

Stick with Maggy


Like others have stated, rounds get caught on "lip" and will not feed in both of my 308AR's. Save your money and go buy a pizza. You'll thank me later.

Works with modifications

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Using in a DPMS GII AP4. First off that front U lip, cut that dude flush! The bolt also didn’t fit between the top lips, dremeled those as well and rounded all the cuts. Bought 5 only 2 fell freely from the magwell. Not competition worthy, but usable at the range.

Great for holding mail down on a windy day


Came with a RF10 I bought from Primary Arms store front. Threw away immediately and bought a PMAG