Rapid Action Battalion (Rab) arrested an illegal arms dealer and recovered four one-shooter guns from Tejgaon industrial area of the capital on Saturday.  The alleged arms dealer was identified as Md. Qayyum Mia, 35. He was also a transport helper.   Based on specific intelligence, RAB came to know that Md. Qayyum Mia, moonlighting as a transport helper on a bus plying the Dhaka-Mymensingh route, has been involved in illegal arms trading for a long time. RAB-3 increased its intelligence surveillance and started collecting information about Md. Qayyum Mia.  Read:DMP Commissioner, Rab DG promoted to grade-1 supernumerary positions Based on secret information, an operational team of the Rab-3 conducted a special operation in Tejgaon Industrial Area on Sunday morning and arrested Qayyum along with four one-shooter guns, said Additional SP Bina Rani Das of Rab-3 battalion headquarters.  During the preliminary interrogation, Qayyum said that he was secretly trading arms with miscreants and terrorists for the purpose of making money under the guise of a helper.