A good extractor must work like a spring to maintain proper tension on the cartridge case and have a hook that's tough enough to withstand the constant abrasion and shock of feeding and extracting rounds. That's no easy task and it takes a Bullet Proof material to do both throughout the life of a gun. That's why Wilson machines their Bullet Proof Extractor from tough Bullet Proof steel bar stock making sure optimal dimensions are maintained and corners are radiused for extended life and smooth feeding. The result is an extractor that holds its tension longer and outlives standard factory parts many times over. If you're looking for a Bullet Proof Extractor, this is it. This is a drop-in part for many guns and may require minor tension adjustment in others.