They had fled across the border to Bangladesh amid heavy fighting between the Myanmar military and rebel insurgents in Rakhine
The tigers were poached from Sundarban.
Rab-8 arrested the poachers from the Satkhira Sadar late Thursday night.
The hides are almost nine-foot long and four-foot wide.
The detainees are, Khulna's Md Gazi Selim, 35, Md Rabiul Islam, 35, Md Gazi Mostafizur Rahman, 36, Fark Sana, 48, Gazi Md Amirul Islam, 25, and Satkhira's Sheikh Bakhtiar Uddin,42.
RAB-8's Major Adnan Kabir said, RAB apprehended the smugglers with the skins and ten rounds of ammunition from near the Itagachi Sangram Tower in Satkhira Sadar Upazila on a tipoff at around 11:30pm.
One of the hides seemed recent while the other was pretty old, he said.