Alexander Arms 6.5 Grendel AR Upper $749.99 Add To Cart DescriptionSpecificationsShipping & PaymentAdditional Info. This is an Alexander Arms 6.5 Grendel complete AR upper. Used with only slight wear. 24" Long Med/Heavy barrel, free float hand guard and low profile gas block. No FFL transfer required. Item Number: 718303458 Shipping: Shipping: $35.00 Ask a Question About this Item