If you made me describe one thought about the Beretta ARX100, it would be something along the lines of “ambi-flex-trous.”
Yes, you can easily reconfigure this rifle in all sorts of ways, which we’ll discuss in a minute, but the interesting thing is you can do all of it with a bullet. Macho, isn’t it? So far, I have yet to use a single tool of any kind for reconfiguration. Well, there was one exception. I did need a wrench to remove the factory flash hider, but I don’t think that counts as it doesn’t fall into the category of routine maintenance. Don’t tell the Beretta folks I applied wrenches and a bench vise to their loaner rifle, OK?
Let’s take a closer look.
The ARX100 looks large and potentially heavy, but it’s not. Judicious use of polymer keeps weight down and unloaded, it tips the scales at just 6.8 pounds. While the stock appears monolithic in design, it breaks into an upper and lower receiver, although the dividing lines are different than the upper and lower components of an AR rifle.
The butt stock is connected to the upper receiver half through use of a hinge, which allows the rifle to operate like a pistol. While the intent is easier transport, shooting with a folded stock feels very Buck Rogers. Since the rifle is piston operated, there’s no buffer tube in the way of pistol operation. The butt stock itself has four different positions to adjust length of pull.
The rifle is covered in web sling attachment points. A rotating swivel is in front of the gas block. The butt has a web sling loop. There are two flat sling loops on each side of the receiver for a total of six.
Rails are also abundant. The entire top surface of the rifle is a continuous rail, so there is no “joint” between receiver rail and forend rail as with an AR rifle. Four-inch rail segments are located up front in the three and nine o’clock positions. There’s a 1 ½ inch rail segment on the bottom in front of the forend cover. If you need to attach a 40mm grenade launcher, remove the lower cover and you’ll find a proprietary rail segment for this purpose. Because military-style rifle. Word is that Beretta may offer a Picatinny adapter at a later date.
The ARX100 comes with polymer flip up sights so you can shoot it out of the box. The front sight features a standard, height-adjustable post while the rear has a rotating aperture dial where apertures are calibrated for ranges of 100 to 600 meters. Be aware that these sights are taller than standard AR models, so they may not co-witness as you like. No worries, by pressing a button on each, you can slide them right off the rail if you don’t want them present.
The trigger is all military all the way. It’s big and wide, set in an oversized trigger guard for easy access with gloves. The pull weight leaves something to be desired, measuring 8 1/2 pounds for me, but at least it was smooth and not gritty. The trigger components are held in place by pins, so assuming demand is there, aftermarket companies like Timney should be able to offer replacements.