The USR™ Upper Standard Receiver is a precision machined upper with a special proprietary bore that is ultra smooth. This reduces bolt carrier friction and creates a much smoother operation. Barrel nut threads, bore and barrel extension surfaces are all machined in one operation so that they are perfectly concentric and perpendicular to the barrel and fixing assembly.
Precision machined from 7075-T6 forgings and Type3 hardcoat Anodized, Class2 deep black. Our forged receiver is packed with 'above milspec' features that makes it the ideal choice for shooters looking for an enhanced configuration while retaining a traditional look. The USR (Upper Standard Receiver) receiver features a raised pad behind the front lug to facilitate a tighter receiver fit. Radiused Cam Pin recess for reduced cam pin ravel wear. Bore, threads, Picatinny rail & front receiver face are all machined in one operation meaning that the highest concentricity and perpendicularity are maintained. The barrel extension area is deliberately undersized for better barrel fit and accuarcy. M4 feedramp cuts as standard. Lantac is an industry leader in quality manufacturing and product development, this is no exception.
Manufactured in the USA from certified aluminum alloy. Superb upper foundation for your next build!