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An american conversion kit for a Polish carbine
An american conversion kit for a Polish carbine

An american conversion kit for a Polish carbine

An american conversion kit for a Polish carbine
An american conversion kit for a Polish carbine

Halcyon Defense is a new company founded by Daniel Fisher, one of the engineers responsible for many of the KNS Precision products. The company specializes in making custom firearms, and one of their most interesting projects is the Tantal carbine chambered for the caliber .277 Wolverine round.

halcyon-defense-277-wolverine-tantal-conversion-11-f5ceb6af0f3813b447be00ca7ba65a4c.jpgThe Wolverine .277 round was designed by Mad Dog Weapon Systems. It is a .270/6.8 mm bullet encased in a shortened Remington .223 casing. The cartridge fits standard AR-15 firing chambers, can be loaded into AR magazines up to their full capacity and offers similar performance to the 6.8 SPC round in a smaller package.

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from left to right: .223 Remington, .277 Wolverine, .300 Blackout, 6.8 SPC

The heart of the Halcyon Defense conversion kit is the barrel. As you might expect, there are no Wolverine AK .277 barrels available, so the weapon manufacturer, Daniel Fisher, had to make it himself using a ready-made .277 barrel with a twist pitch of 1:7, in which he cut out a firing chamber that fits the Wolverine .277 round and shaped it so that it fits the Tantal.

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As you can see in the photos, the carbine conversion is equipped with an adjustable KNS Precision piston, which will allow you to tune the gas system so that it ensures proper operation of the carbine using various types of ammunition, from the lightest supersonic to heavy subsonic rounds.


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To ensure correct feeding of ammunition, 5.56 x 45 mm magazines borrowed from the Polish Beryl carbine were used.


halcyon-defense-277-wolverine-tantal-conversion-9-7b5b937f1def134f656b56d9dd8e9429.jpgAs a result of this conversion, the user receives an AK/Tantal in the 6.8 mm caliber, which round has a perceived recoil somewhere between the 7.62 x 39 mm and the 5.56 x 45 mm round and is suitable for various hunting applications, as well as for self-defense.

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One of the problems with such a rifle may be the availability of ammunition. It will be much more difficult to find .277 Wolverine ammunition compared to the standard .223 Rem or .308 Win. It is worth mentioning that three Tantal. 277 Wolverine carbines have been created so far. Will the manufacturer start production on a larger scale? Time will tell.


Source: thefirearmblog.com

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