Sylvan Arms SA5P-R SA5 Folding Stock Adaptor 4140 Steel Black - The SA5 was designed and tested with professionals and protectors in mind. Turn AR's into a compact, concealable platform with a folding stock adapter built to enhance rifles. The SA5 is lightweight and 250% stronger than the 4th gen adapter. As with the Gen4 adapter, choose from a left folding or right folding option depending on needs. *Does NOT work with Tippmann 22 or LWRC Pistols.*