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.Material: 4140 Steel