AR-15 & AR-10

best ar9 uppers - cover

The Best 9mm AR Uppers in 2021

There are plenty of benefits to converting your AR with a 9mm upper. The flexibility of PCCs has driven their popularity over the past 20 years, making them the go-to choice for those who want a multi-role pistol caliber rifle. With all the options and benefits of building a pistol-caliber carbine (PCC), it’s high time you get started.