1986 Battle Gear Accessory Pack #4 (Cobra)
Hasbro released one Battle Gear Accessory Pack every year from 1983 until 1988. They featured remakes of weapons and accessories from the previous year's figures, but they were molded in a different color plastic than the original (either so they would not be confused with the originals, or to save money on the manufacturing process).
The scans above are courtesy of Devon Alexander. Please visit piquasvintagetoychest on eBay to see his vintage Joes.