The AR-15's users are divided on whether the weapon should employ a gas piston or a direct impingement mechanism. Each choice has its own set of benefits and drawbacks. Just as with the gun, it all comes down to what works best for you. Because of the AR-15's versatility, you may choose either one or the other. Because the direct impingement and piston-driven systems function independently of the lower receiver, you may alternate between them at a whim. For example, it might be possible to mount a piston-driven upper receiver on a gas piston AR. What differentiates the two, and...

An accessory dwelling unit (ADU) is a small, self-contained living space that is attached to or separate from a single-family home. When planned and built well, ADUs can give homeowners extra income, more room for family or guests to live in, and a higher value for their property. If you're thinking of adding an ADU to your California property, here are six design ideas to keep in mind that will help increase the value of your home. 1. Use Features That Are Good for the Environment There are many things you can do to make your ADU in Castro Valley,...