The "spoon over a cheese grater" sound emitted by modern sporting rifles whenever they're charged or fired has always been one of the AR platform's ugly blemishes and one JP Enterprises worked ardently to eliminate. After years of specially selecting buffer tube manufacturers based on the quality of their tubes' interior finish, JP Enterprises opted to design and produce their own action springs with a perfect centerless-ground and precision-polished outside diameter. These JP Custom Buffer Springs are an inexpensive way to see exactly why they have a reputation for having the quietest, smoothest rifles on the market. JP's pursuit of perfection didn't stop with springs though and led ultimately to the creation of the patented Silent Captured Spring in 2012. Maintaining all the benefits of their polished buffer springs and proprietary LMOS buffer, this combination buffer-spring assembly eliminates the friction of standard buffer components resultin...