ASC 5 Round 450 Bushmaster Magazine for AR-15

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A Reliable Magazine to Feed Your .450 Bushmaster “Thumper”

The .450 Bushmaster is a popular hunting cartridge, but a good magazine can be hard to come by.   With the straight-wall design, supporting each round for reliable feeding can be a challenge.  Luckily, ASC has it all figured out with this 5-round magazine for your “Thumper” AR-15.  Featuring supporting ribs to keep cartridges in place, and preventing malfunctions, this magazine is a great choice to feed your big-bore hunting rifle.

Designed to Prevent Double-Feeds

While originally intended to fit a standard AR15 magazine, improper geometry and follower design can lead feeding issues and rifle malfunctions for .450 Bushmaster. By creating a proprietary internal bracing system and laser-welding it into a 410 stainless-steel body, this magazine prevents rounds from getting misaligned and prevents double-feeds.

The enhanced system of this AR-15 magazine also ensures reliability over thousands of rounds, not just the first shots at the range.

Specifications:

  • Caliber: .450 Bushmaster
  • Capacity: 5 Rounds
  • Body Material: 400 series stainless steel
  • Spring Material: 17-7 Stainless Steel Wire
  • Follower Material: Polymer
  • Follower Color: Black
  • 17-7 Stainless Steel Wire Spring
  • Anti-Tilt Follower
  • Weight: 4.56 oz
  • Finish: Matte Black

Have Questions About this Product?


The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

ASC Limited Life Warranty

If you are not completely satisfied with your purchase, you may return it within 90 days of purchase for an exchange to an identical product or an ASC credit with proof of purchase.

Our Limited Lifetime Warranty covers defects in materials and workmanship under normal use, for ASC branded products with proof of purchase. ASC will exchange it for an identical product or issue an ASC credit.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 5 reviews
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R
RE
Good Mag. so far.

The quality of the Mags are Great. I bought some of the 5 rd and 7rd Mags for the 450 BM. I've run about 20 rds through them and no feeding issues so far with the Hornady XTP or the Speer Hollowpoint

Thank you for your review! We're glad to hear that you're enjoying the ASC 5 Round 450 Bushmaster Magazine for AR-15.

A
Anonymous
Solid performer

Mags hold 5 rounds. Drop free easily from the rifle. Has the notch cut in the front to ease feeding. Feed lips were super sharp, with a burr on the underside against the brass. I had to polish them to allow smooth feeding. One magazine I had to adjust the feed lip opening to enable first round feeds. Now working perfectly.

J
Jason Gafford
Asc 450 five round mag

Magazine functions as designed. The only problem is the metal cuts your brass as it is loaded into the firearm. A few minutes with a file greatly reduces the damage but it is still there.

H
Henry LINEBERRY
ASC Bushmaster Magazine

Ordered two magazines, Both work flawless.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

R
Ryan
Works great

No jams, no feed issues, and no premature lock backs.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.