He is being held at a Garda station in Kildare.
A man has been arrested after Gardaí were called to reports of a man driving on the M4 in Kilcock armed with a suspected gun yesterday morning.
The man in his 20s was arrested in the Tallaght area of Dublin following a Garda operation, and an imitation gun was recovered.
He is currently being held at a Garda station in Kildare.
Minor damage was caused to two Garda cars in the course of the incident - no one required immediate medical attention.
Gardaí say investigations are ongoing.

Kfm Obituary Notices
Sharp Rise In M9 Collisions With Garda Call-Outs Up Year-On-Year
Councillor Seeks Clarity On How Often Nightclubs and Late Bars In Naas Are Inspected For Fire Risks
Unpaid Eight-Month Work And Training Placement For Adults With Disabilities Branded "Extremely Unfair"
Department Of Education Defends Kildare SNA Cuts Amid Claims Of Reduced Need At Some Schools
Naas Nurses Threaten Escalation As Staffing Row Deepens
Driving Tests Face Disruption As RSA Testers To Strike Next Week