Some 20 SKS assault rifles, eight M1 carbine military self-loading rifles, four sub-machine guns and an anti-tank rifle were also handed in during the three-month amnesty which ended on September 30.

Police said there were 602 handguns and 1575 shotguns surrendered to police and dealers while 14 crossbows, 27 suppressors, samurai swords, knives and other prohibited weapons were also handed in.

"It's concerning these high-powered weapons and modified guns were in our community but they have now been destroyed under amnesty arrangements," Deputy Commissioner Jeff Loy said.

Nine of the top 10 local area commands for weapons surrendered were in regional areas, including the Tamworth-based Oxley command which topped the list with 1322 items.

It included 987 barrels handed in by one owner.

The Northern Beaches, where 295 items were surrendered, was third on the list.

"It's extremely encouraging to see community members recognising the danger posed by these weapons and doing the right thing by handing them in or having them registered," Deputy Commissioner (Regional Field Operations) Gary Worboys said.

"There has been a really strong response across the state which means there are now fewer unwanted or unregistered guns on our streets."