Often times a full rail system on a weapon is not the best choice for mounting accessories. They can be bulky, expensive, and heavy. In comes the FAB BSR-1. This is a barrel mounted picatinny rail attachment that allows for the attachment of a rail accessory to your weapon. It is light, durable, and inexpensive. Downsides include less support for the accessory(heavy accessories can weigh down your barrel), and more exposure to heat coming off of the barrel.
The BSR is a potentially high value accessory if you are just seeking to add a flashlight or laser without all the expense and trouble of changing your foregrip.
