New In Box, never used CROSSHILL TECHNOLOGY XSR-15 Ambidextrous side charger AR upper receiver (with bolt carrier group). This AR upper receiver eliminates the need for a conventional AR charging handle due to having it integrated in the bolt carrier group, which allows it to double as a forward assist. Machined from billet aluminum and Type III Hard Coat Anodized per Mil-Spec. The included bolt carrier is Nickel Boron Coated for ultimate hardness, easier cleaning, and natural lubricity. This coating has a Rockwell hardness of 70+! NiB is harder than Tennifer (used on Glocks), Phosphating, and Meloniting. This coating cleans much easier than any finish so is ideal for those using suppressors, and goes longer in between cleanings regardless of suppressor use. The bolt itself is phosphate finished. Ambidextrous XSR-15 uppers use a modified bolt catch, which is included. Comes in its original box with everything shown in the picture. Buyer acknowledges compliance with all Federal, State and Local laws. If you do not want to send a Money order or cashiers check, create a GUNTAB.com account; it is a PROGUN Escrow service for conducting transactions related to the 2nd amendment. Its like PayPal, minus the anti freedom B.S BUYER pays transaction fee for GUNTAB