Enter your model number above to make sure this fits.<br />AR15/M4 stock combo wrench heavy duty multi tool<br />Compatible With Most M16， M4， And Ar Variant Rifles<br />Constructed Of Steel With A Durable Powder Coat Finish<br />features: car stock w/3 point castle nut/locking ring finish: all steel construction<br />This unique tool combines all of the necessary tools to eliminate the need of owning multiple wrench types