Better fit than factory Ruger.Tightened up bolt and smoothed out action. High quality product.

Immediately I could tell a big difference between the two. Plus this is machined and not a casted piece. As much detail as Ruger had put into the OEM part, you can just look at this, and tell it's a much better part.

I ordered this, an AO bolt handle, and a third party trigger spring last fall and spent the winter tweaking an American Ranch 5.56 and handloading for it. This part, the trigger spring, and a little stone and polish work account for reducing the factory trigger pull successfully to an extremely consistent 2.5 lbs with no creep except for the safety blade spring's compression period. I don't know if the bolt handle helped in that regard, but the two parts together plus lapping the lugs certainly eased the bolt lift an appreciable amount. I lapped the bore with a poured lead slug and Flitz, laddered up a handload with a favorite varmint bullet, and finally got to the range this month on a very calm day. Oh, the joy of sending 5 bullets through one hole from a $300 budget bolt gun with a carbine-length barrel! I'm certain that no matter how much credit I'd like to take for my patience and persistence in hand-working this little rifle in, the AD Arms Cocking Piece and AO Bolt Handle were at least equally essential to my results. What's more, I have a friend with a Ruger American whose cocking piece broke on him during a dry fire session. I've heard of this happening to others as well. I'm much more confident in this AD Arms piece, and glad I bought and installed it before the OEM part ever had a chance to fail me in action. Machined and heat treated as AD Arms claims in the product description, I expect it to outlast most of the rest of the rifle.

Not cheap but much better quality than the standard part and feels smoother with the firing pin upgrade I installed at the same time. Never have to worry about a failure in the field