Howling Raven 10 round Mosin magazine

by Miles

Howling Raven is releasing a 10 round magazine extension for the Mosin Nagant rifle. It uses the existing rifle magazine to place the extension around. MSRP is $69.95 but pre orders are going for $50, release date is around December this year, but they seem to still be in the long process of working with their manufacturer. We blogged about their prototype design back in March of this year, but they seem to have worked everything out and are finally ready to offer it to the public.

The Mosin Nagant 10 round Mag extension, is our most ambitious endeavor to date. The goal was to create a product the clips on to the existing mag well and expands the total ammo capacity from 5 to 10 rounds. It is a ‘plug and play’ device. It simply clips on and off requiring NO rifle modifications.

It has taken more than a year and upwards of 50,000.00 dollars to get to the final stage. We came up with the concept over a year ago and met with a group of engineers at Knighthawk Engineering in Houston, Texas. ( They helped us put our concept to paper.
We then met with the executives at Blackwell Plastics in Houston, Texas ( They helped us turn our design into a working 3D print and they are the same company that is making the mold that will form the polymer body of the extension.

Probably the most difficult and costly step was the development of a spring that would work with our design. After numerous prototypes, the people at Katy Spring in Katy, Texas ( helped make it a reality. The Springs have been produced and are ready to go.
We have made a 50% down payment on the mold. A second payment of 30% is required in 6-8 weeks. Then we receive samples to make any last minute changes. The last 20% of cost will be rolled into the first production run. Once the last stage of testing is complete (which will take about a week), we will begin production of the first 500 Extensions. The 500 Springs are already finished and have been delivered to us.


Infantry Marine, based in the Midwest. Specifically interested in small arms history, development, and usage within the MENA region and Central Asia. To that end, I run Silah Report, a website dedicated to analyzing small arms history and news out of MENA and Central Asia.Please feel free to get in touch with me about something I can add to a post, an error I've made, or if you just want to talk guns. I can be reached at

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  • Truth Speaker Truth Speaker on Nov 11, 2015

    I'd prefer a steel version. Probably be more expensive, but it would look sweet!

  • Swarf Swarf on Nov 12, 2015

    I wouldn't pay $70 for a removable mag for my Mosins, much less an extension. I mean, you still have to load it from the top, right? And it's not like they make 10 round stripper clips for 54r, right?

    What's the point?