CONTACT

FAQ

Can I ream out my 7.62×39 barrel?

A: In most cases, reaming a 7.62×39 barrel is not recommended.

Reasons:

Hard-chrome and nitrided barrels will quickly dull or destroy a reamer, so reaming these finishes is generally not practical.
The .310-inch bore diameter severely limits usable bullet types. Very few bullets will stabilize or feed reliably; in practice, only 150-grain .308 bullets tend to shoot satisfactorily in this configuration.
It is rarely cost-effective. Between shipping the rifle, a gunsmith visit, reamer rental, and return shipping, the total cost generally exceeds the value of a simpler replacement or conversion.

Recommendation: Rather than reaming, consider replacement or conversion options (see next FAQ).

Q: Can I convert it to a bolt-action?

A: Yes — it is possible to convert to a bolt-action, but the most cost-effective and reliable approach is typically to replace the barrel or use a purpose-built upper.

Options and considerations:

The most cost-effective method is to replace your barrel and use a Bear Creek Arsenal 7.62×39 upper (or an equivalent assembly) designed for that cartridge. Swapping to a properly sized barrel/upper is straightforward and avoids the problems described above.
Some platforms (for example, the Ruger American) may require additional modifications. Because the Yahweh round has a long overall length (2.1260″ O.A.L.) and because of AR-15 magazine dimensions, certain rifles require you to change the bottom floorplate or make other feed-related modifications.
If you convert a platform meant for .308, you may also need a new .308-spec barrel or other parts, which can increase cost.

Recommendation: If your goal is reliable function and reasonable cost, buy a correct 7.62×39 upper or a replacement barrel built for that cartridge rather than attempting to ream or heavily modify an existing barrel.