So glad you asked. Same as other's, you push the button and tap barrel tips on soft surface. They pop apart. However, when you reverse the process, it's even easier because they slide forward once dropped in place and click into the locked position.
My issue is removing the stock. Compared to a P-17 I have, this looks more complicated. The P-17 requires the removal of two screws, one through the stock neck near the trigger guard into the back of receiver under the back of the sliding breach and two, the removal of a screw inside the base of the receiver which is threaded to the steel rod in the stock.
I don't know what to do in this gun because it's all different.
Best Carl