I agree with everything 30-30man said, Don't BUBBA the rifle. But a aftermarket stock is often needed to get the right "Feel" if your a larger framed person. The China guns are made for short lil dudes, and often just won't Fit americans. The Yugo's are a NATO length gun and generally fit better.
Stay with the Fixed mag (factory 10 or 20) . Any aftermarket "Duckbill" mag is begging for problems.
The Bayonet has lots of positive points, the biggest of which is it's use as a Monopod.
If you replace the stock with a Folder, you will need the other Tapco parts to make it .922 compliant.