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Thread: The difference between Sten's Brass/Bronze bolt and the Steel bolt

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    The difference between Sten's Brass/Bronze bolt and the Steel bolt

    Does anyone know what the feed rate difference, if any, on the Sten's Alloy bolt (Brass/Bronze) and the stock Steel Bolt?

    I know that the Alloy bolt was cast to a "near net finish", and the steel bolt was machined from a bar stock/billet or what ever England called it back in the day.

    When copper got too scares/expensive, they went back to steel.

    Thanks,

    Adolf

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    There’s no noticeable difference in the rate of fire.

    The aluminum bronze bolts are very slightly heavier than the steel ones. They got the weight to come out close to the steel bolt by leaving the spigot solid. (The spigot is the part at the back of the bolt the spring fits over.)

    The aluminum bronze bolts are much softer than the steel bolts. Guys were buying them to convert to semi-auto because they are easy to machine. The problem they ran into is the tip of the tripping lever cuts into the bottom of the bolt in semi-auto fire.

    The aluminum bronze bolts work well in the suppressed guns. Milling the spigot out brings the weight down so they run subsonic ammo better.

    The cast aluminum bronze bolts were made to cut down the amount of machining time. It was a war time measure. They needed guns fast. Once the war was over they went back to making the bolts from steel.

  3. #3
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    Traveler,

    Thanks for the info!

    Adolf

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