Precision machined from ordnance grade steel and intended to interface in shut tolerance with the aluminum stock chassis. Took the screwed alongside one another by hand Barrel and Action to check out the way it match the stock and it went in nice also... (I'm sure the male at Crane https://ketamine-for-dogs10859.blogdomago.com/31571115/the-smart-trick-of-sage-international-stock-that-no-one-is-discussing