The 5.56mm SIG SAUER M400 TREAD Rifle | USCCA

The SIG Sauer TREAD series of AR-15s is advertised as being “easily customizable, with a full line of purpose-built accessories, designed and built in the USA.” That ability to customize their rifles is important to a lot of AR users, as evidenced by an ever-expanding number of aftermarket parts and accessories. While it is true that the TREAD series is easily customizable, I like how the rifles are set up right out of the box. SIG’s 5.56mm M400 TREAD is just about as ideally set up as it gets. The only things needed in my book are optics/sights, a weapon light and a single-point sling.

This is a companion discussion topic for the original entry at