Sniper AR-15 Extended 9.3in Pistol Buffer Tube Kit Tube Castle Nut Receiver End Plate Carbine Recoil Spring Carbine Recoil Buffer Black/Silver. The non-symmetric shape allows the use of a standard buffer in stead of two smaller buffers which is the standard configuration on most AR platform rifles. This design makes the use of a buffer weight in stead of two small buffers. This design makes use of a single large spring to reduce reciprocal mass and reduce felt recoil. With this design the held weight of the buffer does not change therefore balance of the buffer tube remains equal. The recoil bumper is a standard carbine buffer but with a smaller length. For shorter carbine buffer tubes use a shorter carbine buffer tube and a shorter recoil pad. Specifications for Sniper AR-15 Extended Pistol Buffer Tube Kit: Manufacturer: Sniper Color: Black/Silver Gun Make: AR Platform Gun Model: AR-15 Condition: New Package Contents: Sniper AR-15 Extended Pistol Buffer Tube Kit Extended 9.3" Buffer Tube Castle Nut Receiver End Plate Carbine Recoil Spring Carbine Recoil Buffer. What firearm models does the manufacturer say Sniper AR-15 Extended Pistol Buffer Tube Kit is compatible with? The manufacturer says that Sniper AR-15 Extended Pistol Buffer Tube Kit is compatible with AR-15Sniper AS5P06: AR-15 Extended 9.3in Pistol Buffer Tube Kit Tube Castle Nut Receiver End Plate Carbine Recoil Spring Carbine Recoil Buffer Black/Silver