Ready For Chambering & Machining To A Custom Contour
Chrome-moly steel alloy blanks come button-rifled in three popular calibers to give you the flexibility of building a true one-of-a-kind custom AR. These are actual blanks that require machining of all exterior contours, chambering, muzzle threading, and installation of the barrel extension. Available in standard .223/5.56mm, plus two Russian cartridges popular on custom ARs: 5.45 x 39mm and 7.62 x 39mm. All come with 1-9" twist rifling.
AR-15, Issue:07, Page:016
Big Book Catalog, Issue:64, Page:016
SPECS: 4140 chrome-moly steel, with a temporary black oxide finish to prevent rust during storage. 20" (2.5 cm) long x 1" (51mm) O.D. 1-9" twist.