The SU16 series is designed, engineered and crafted to be the perfect everyday Sport Utility rifle. Differing primarily in barrel length and stock configuration, these gas piston operated, semi-auto rifles accept standard AR-15 magazines, with some models that store two spare, proprietary magazines in the stock. Slightly smaller and a 1/2 lb lighter than the A model due to its low profile 16 inches barrel chambered in 5.56 NATO, the SU16B offers all the same features. You'll enjoy the built-in magazine carriers in the stock, integrated bipod forend, adjustable iron sights and Picatinny-style rail for mounting an optic.Features:Adaptable, durable, modularConfigurable - there are a few SU16 models and configurations to choose from to suit your needs, but all of them feature iron sights and an integrated Picatinny-style rail on top of the receiver to mount your favorite opticUtility - if you know anything about KelTec, you'll know that we like to keep things light and simple, the SU16 is an excellent choice for your go-anywhere 5.56 rifleReliable - all of the SU16 models are gas-piston operated which keeps fouling to a minimum where the magic happens, thanks to the long travel of the bolt carrier, the SU16 series rifles shoot smooth, flat and reliably