How to get NEW random rolled Old Fashioned and more

Went to Master Rahool to check if he dropped the new weapons since I hadnt seen any videos or posts about it. I right clicked on his engram and sure enough he does drop them. Sadly though, the drop rate is very low and after 3.5 thousand shards I managed to get about 8 New weapons in total

The Old Fashioned,Sniping,Destiny 2,Random Rolls,Hawthorne's Field Forged,