Invading aliens' low tech weapons are no match for Earth's modern weapons [duplicate]

Question

This is not "The Road Not Taken" by Harry Turtledove.

Similar story idea, but I read Turtledove's story before posting this and it's not it.

Probably a short story. (Can't think how it might be stretched to a novel's length.)

In English, written at least 20-30 years ago.

The one I am trying to remember had slightly more advanced aliens. But their weapons were still primitive compared to Earths weapons. (Still single shot but probably not muzzle loaders.)

I recall the fight not being quite so one-sided. (In Turtledove's story the "ground battle" was over in just a few minutes, most aliens not even getting off a second shot.)

I seem to recall the ground forces having time to report back to their commanders of the battle's progress. (i.e. They had radio communications.)

The main thing I recall is the aliens describing humans' full auto weapons as "stitching guns" or "stitching weapons." (Because when their troops would be hit by them they would get 4-5-6 holes appearing side by side across the body in a line.)

I seeming to recall the invasion lasted days or weeks before the aliens were defeated. (Maybe because the aliens didn't want to give up thinking the humans "stitching guns" had to run out of ammo soon. No way the humans could have that much ammo.)

Answer 1

"Stitching guns" is a term used by the alien invaders of Earth in Christopher Anvil's "Pandora's Planet" (1956).

The aliens (other than interstellar flight) are roughly equivalent tech to Earth:

Brak Moffis looked at Horsip and gave a wry smile. "Technologically," said Moffis, "they were very near Centra 0.9, and in some areas higher."

The aliens have fighting a long, costly war against human guerrillas. At the start of the story they have been fighting on Earth for about 4 months, and have managed to establish several fortified beachheads and largely reduce most organized large-scale opposition.

The aliens' weapons are single-firing multi-shot weapons (like big shotguns) they call "splat guns."

"let's get back to this stitching-gun. It only shoots one dart at a time. How does that make it better than our splat-gun, that can shoot up to twenty-five darts at a time?"

They call human machine guns "stitching-guns":

"What’s wrong then?” demanded Horsip.

"The natives’ stitching-gun,” said Moffis dryly.

"The which?” said Horsip.

"Stitching-gun,” said Moffis. "It has a single snout that the darts move into from a traveling belt, like ground-cars on an assembly line. The snout spits them out one at a time and they work ruin on our men."

Answer 2

This is likely to be Pandora's Planet by Christopher Anvil, originally appearing in Astounding Science Fiction in September 1956.

It was later reworked into the start of a full-length novel, Pandora's Legions. An excerpt from the novel:

"What's wrong then?" demanded Horsip.

"The natives' stitching-gun," said Moffis dryly.

"The which?" said Horship.

"Stitching-gun," said Moffis. "It has a single snout that the darts move into from a traveling belt, like ground-cars on an assembly line. The snout spits them out one at a time and they work ruin on our men. If this five-hundred man team you speak of was hit on the road, and just fifty men from it tried to beat the natives, we'd probably lose all fifty."