Hearing Zhao Ling'er's question, Su Xuan couldn't help but sigh that her IQ was so high.

Now the fire gun in his hand is only five or six inches long.

The energy produced by gunpowder is already the lost part after pushing the projectile out of the barrel.

After lengthening the gun tube and adjusting the dose of gunpowder, it can indeed extend the range of the gun, and also improve the power and accuracy of the gun.

......

Chapter 786 of "Under the Nine Thousand Years Old" After all, he is a trick is hitting with his hand, please wait a moment,

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