Maximin Carter, 51, from Neath Port Talbot, pleaded guilty at Swansea Crown Court to a string of offences following the dramatic scenes in Abergwynfi last month.
Police were called to a property on Commercial Street on February 14 amid concerns he was attempting to make an explosive.
As previously reported by Swansea Bay News, the incident led to homes being evacuated and a major emergency response in the village, with residents told to leave for their safety.
Officers later discovered what they described as a “significant” cache of weapons at the address.
Carter has now admitted possessing an air rifle, a samurai sword, a knuckle duster and four telescopic truncheons.
He pleaded guilty to possessing a banned weapon under the Firearms Act 1968, along with six counts of possessing offensive weapons.
The 51-year-old has been remanded in custody and is currently being held at Swansea Prison.
He is due to be sentenced at Swansea Crown Court on April 7.
The case follows the major incident that unfolded in Abergwynfi, which Swansea Bay News covered live as police cordons were put in place and residents were evacuated.
We also reported how a man later appeared in court charged in connection with the discovery of weapons at the property.
The latest development confirms the scale of the weapons haul that triggered the emergency response and disruption for the local community.
