Best Unmodified 5.56 Magazine for .450BM

Talk about the AR15 style rifles chambered in 450 Bushmaster.

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Best Unmodified 5.56 Magazine for .450BM

Postby BILLY10MM » Sun Apr 08, 2018 10:35 am

What is the most reliable unmodified magazine for .450BM? I'm looking for something that holds between 5 and 10 rounds.
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Re: Best Unmodified 5.56 Magazine for .450BM

Postby Jim in Houston » Sun Apr 08, 2018 5:47 pm

I have used a variety of 20 round magazines, both steel and polymer. Brownells is one brand of steel; Magpul's P-mags for polymer.

You should be able to get up to 7 rounds loaded. If you will be hunting, some states limit the size of the magazine. In that case a 10 round mag may be what you want to hold four or five rounds.

The straight sided magazines work the best, as the 450BM cartridges don't go around the curve in 30 round mags very well.

I have used both with the 5.56 follower and with a 450BM (black or blue) follower.
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Re: Best Unmodified 5.56 Magazine for .450BM

Postby Jim in Houston » Sun Apr 08, 2018 6:05 pm

Just read another post on this forum about Sig Sauer 30 round mags working for both 5.56 and BM450, even though they are curved.

http://450bushmaster.net/viewtopic.php?f=2&t=15691
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Re: Best Unmodified 5.56 Magazine for .450BM

Postby RLWithrow » Sun Apr 08, 2018 6:07 pm

This page shows WW's magazine. They work 100% for my rifle.

https://shop.windhamweaponry.com/collec ... vers-parts
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Re: Best Unmodified 5.56 Magazine for .450BM

Postby Hoot » Sun Apr 08, 2018 8:32 pm

RLWithrow wrote:This page shows WW's magazine. They work 100% for my rifle.

https://shop.windhamweaponry.com/collec ... vers-parts


And factory crush washers for $2.95 to boot!

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