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

Would not work for my application

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These magazines appear to be of robust and quality construction, but would not work in a Palmetto State Armory Gen 2 PA10. The PMAGS, I ordered, worked flawlessly!

Great Magazines


flawless in every ar -15 and lr-308 caliber I have !

Not for pa10


Mag catch won't hold this mag and bolt won't hold back on an empty mag on a palmetto gen 2 pa10. Pmags work just fine.

Nice, but didn’t work for my lr308

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Like the other buyer these did not fit my build(matrix receiver set), so hoping they take them back:/ They feel great and appear to be of very high quality, so if they fit yours don hesitate to order them.

Works in Mega lower


Work fine in my Mega lower. My build initially had a chamber defect that was causing case head separation. Blew a couple of pmags out, irreparable. These I could piece back together and they were still serviceable. Barrel manufacturer fixed their issue eventually. Anyhow, if you have a Mega lower you'll be fine with these.

Fit isn't guaranteed, Spike's .308

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I tested the feeding with my Spike's Livewire .308 set. My BCG snags the feed lips of the magazine and fails to go into battery. Full and empty. Once I got the bolt to go home, cycling back snags the top of the lips again. I love the aesthetics of these so I endured a little hardship. I hand filed down the lips of the magazines (5 total) to get them to fit. If you have a pneumatic burr bit life will be easy. ASC builds quality magazines however their fit to your rifle isn't guaranteed.

Will never buy again

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Mag catch wont hold the mag , falls out of my Aero Precision .

keep 'em cycling and support the N.R.A.

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first off, the P.A. team really goes the extra mile for their customers. and they truly support Veterans, police/firemen, now, the 20 round mags ran flawless, and P.A. has the best price period on them, these mags went on 2 different PSA/PA 308 builds i did for myself and my son. neither of us had any complications. get these mags and run with them. you'll be glad you did.

No go for PWS

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Would fall out of my PWS rifle and had trouble feeding when it wasn't falling out. Feels nice in hand just a no go for my application

Hard as Heck to Load! But it Functions Perfectly!

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I bought 3 of these awhile ago but held off writing a review until I had a chance to actually use one.
<br>They fit and function perfectly in my Aero M5 lower. If the mag catch won't hold the mag in, you probably need to adjust your mag catch! Just sayin'...
<br>But these aren't perfect. It is EXTREMELY hard to get the 19th and 20th round in. And then if you do, it's EXTREMELY hard to seat the mag in the gun with a closed bolt. I checked this with 2 of the 3 mags I received. Both the same.
<br>Compared to my 20 round Pmag, the ASC mag is a lot shorter. So that spring must be really compressed.
<br>Once you get the mag in on a closed bolt, it's EXTREMELY hard to rack the charging handle because that top round is pressing so hard against the carrier. I gave up and inserted the mag with an open bolt. (I have a new Lantac 308 BCG so I don't think the BCG is the problem)
<br>In testing, I shot a full 20 round mag and it functioned perfectly. No FTF, no FTE, and the bolt locked back on empty.