The Classic Army fully CA249 MKII LMG by Classic Army is the original squad level support weapon. Very much like the real steel, the CA249 is capable of delivering a high volume of full auto fire to support, suppress, defend, or attack as needed. This version features a rear stock, full metal lower receiver, feed tray cover, bipod, and barrel assembly. The rest of the rifle is very durable polycarbonate. The fixed sights are sturdy metal and are easy to use even for the most ambitious n00b. The mechbox is of a PGC design and as such can use most TM compatible parts for replacement or upgrade. This edition comes with a standard M16 300 round hicap magazine + box mag. Can use all standard M4 and M16 type mags. The 1200 round high capacity box mag is optional (included). During normal operation be careful using the carry handle or bipod. While they are useful in a pinch, be careful as they can succumb easily to continued abuse. The battery fits inside the rear stock of this rifle. Simply flip up the wire shoulder rest and undo the screw in the butt plate, reverse order and you're done. Airsoft players love using this rifle for squad support functions. They say the high rate of fire makes it very formidable in a firefight! Battery compartment is in the rear stock, accessible with the allen key. Can fit a standard large type battery, 8.4v, or can use many other types with a mini - large type Tamiya plug adapter (nunchuck, lipo, etc).Note: Kit includes the 1200 round box magazine. However, battery and charger are sold separately.