this has a thick special type of rubber casing covering a slim stainless steel pin (non rust all weather) which adds to its stability and strength. It wont deform or break like polymer buffers can. This is by far the best buffer that we know of. This has genuine benefits as a quality upgrade for your Ruger. Reduces bolt action noise which makes a difference when using a silencer / suppressor. Eliminates excessive wear on the bolt and prevents egg holing of the action. Eliminates harmonics associated with vibration. Reduces shock on scope and dot sight. It’s a simple install, remove the stock, tap/push out the old steel pin, then push/tap the new buffer through. You dont even need to remove the trigger assembly or bolt. upgrade to Part # B-46 This listing is for one buffer, but select as many as you want. * video clip shows how quick and easy it is to install (mine is not this brand)