there is a ryobi part that connects right in to the handle you have now and adds the quick connect for you and is a direct fit to the portland.

https://www.amazon.com/gp/product/B00QMKHNM0/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

or you can upgrade your hose and use a pistol would be about a $50 upgrade for both but is well worth the price