These Picatinny rails are a top product, thay are 100% better that a lot of the after market rails that are produced.
Also
The modifications that Nick doesto the rapid hammers make them lighter and improves the runing of the hammer in the action. The silent hammer pip that is also attached makes a hugh amount of diffrence in reducing the noise of the hammer striking the valve stem.
As with all Nick's mods they are done to the highest possible standard.
http://www.picturetrail.com/gallery/view?p=6&uid=9453841&