AR-15 Shockwave Pistol Brace with Kak Tube Kit has everything you need to turn your stripped AR-15 Lower Receiver into an AR Pistol Receiver with stabilizer. ATF has clarified that installing this product does NOT turn your pistol into an SBR regardless of barrel length.
Manufacturer: Shockwave / KAK
Model: Shockwave Pistol Tube Kit
Compatible With: All Standard AR Lower Receivers
Included in this kit is the following:
Pistol Receiver Extension with dimples for adjusting and locking down Shockwave stabilizer *Commonly referred to as “buffer tube” or “stock tube”