The rest of the components, including the removable barrel, lower receiver assembly, AR-15 pistol grip and AR-type buffer assembly are modular and can be traded out to change a particular gun's ...

Now, a group dedicated to 3D-printing firearms announced the development of a design for a Colt CM901 rifle's lower receiver -- and it's available for download off the Internet.

A lower receiver is the body of the gun that connects its stock, barrel, magazine and other parts. As such, it's also the rifle's most regulated element.

But what of the lower receiver assembly? In a short range defensive rifle, the argument can be made that simpler is better.

Looking for a slightly different looking AR15 lower receiver? If so, Seekins Precision may have what you are looking for with their AR15 ambi-lower receiver. This lower is cut from a T-7075 ...

On a recent weekend, I printed the key part (called the lower receiver, shown in blue in the photo) of an AR-15 semi-automatic rifle on a consumer 3D printer made by Makerbot.

What exactly is a gun, after all? The lower receiver part of a firearm is the crucial part that contains all of the gun's operating parts, including the trigger group and the magazine port. (Under ...

is lower than ever before. This is the beautifully milled aluminum lower receiver for an AR-15 that we built today. Before I put actual explosive rounds through anything I'd made, ...

The modular design of the AR rifle is a big part of its enormous popularity. By simply popping the takedown pins and switching the upper receiver assembly an AR owner can switch from a .22 long ...

A man traded in 110 3D-printed lower receivers for over $20,000 in gift cards at a New York Attorney General's Office gun buyback program in Utica, New York.

FORT WORTH, Texas — A federal judge in Texas granted the injunction requested by a manufacturer of “80% lower receivers,” a not-entirely-assembled gun part, that challenged a Bureau of Alcohol, ...