Upgrade your M4 rifle with this Bull outer barrel assembly from E&L Airsoft. Constructed fully from stainless steel, this one piece outer barrel assembly provides ample protection for your inner barrel from the outside elements. The universal design of this outer barrel allows it to be quickly and easily installed on most M4 and M16 style airsoft rifles. Coming in only at 7 inches long, this is a perfect low-profile addition to your CQB lowdown. E&L Airsoft has everything you need to completely outfit your rifle with everything you need to focus on the battle at hand and take the win.