Shane Allan Kember, a game shooting enthusiast whose Facebook page features photos of him posing with exotic dead animals, was one of seven men arrested by detectives investigating the supply of firearms in western NSW.

Kember (pictured right) pleaded guilty to two charges - knowingly taking part in the supply or a pistol and possession of a prohibited weapon - in a plea deal with prosecutors ahead of his scheduled trial in May 2019.

However, Kember challenged the police version of events, claiming he was not present when an associate, Stephen Lawrence, made the exchange at Kember's property at Kembla Grange on August 31, 2016.

He claimed he had simply introduced the alleged buyer, Darryl Austin, to Mr Lawrence then went inside to eat dinner while the men conducted their business.

But Judge Andrew Haesler rejected Kember's claims and found he had not only been present when the transaction took place, but that he had been "central" to the transfer of the Ruger pistol from "one unlawful possession to another unlawful possession".

"What he did was a serious breach of the Firearms Act," Judge Haesler said.

The court heard Kember had had his gun licence revoked in 1996, however police found seven rifles during a search of his house, all of which were registered in his wife's name.

While she was found to possess a current licence, police confirmed she had moved out of the property some months earlier and was unaware Kember had illegal possession of guns at the property in her name.

In court on Friday, Kember's lawyers sought a lenient sentence for their client in the form of a community-based intensive corrections order, however Judge Haesler refused the request.

Kember will be released on a 12-month parole period in July next year.