This full metal airsoft rifle has a very realistic feel; it weighs similarity with its real-steel counterpart. The body is built out of alluminum to achieve close replication to the real-steel. The SRC M16A3 weights about 7.5 lbs, the exact weight of the real-steel M16-A3/A4. If steel is used for construction they would've exceeded the weapon's weight by a long shot. The magazine has a follower that triggers a switch in the body to cut off power to the gearbox whenever the magazine is empty. Because of the follower design, it doesn't matter how many rounds you load into the magazine the gun will stop firing after you clear the magazine. Excellent Build quality Exact replica of mil-spec M16 in all aspects (dimension, weight, operations etc.) Fully compatible with most real-steel accessories Extreme realism - e.g. weapon stops firing when magazine is empty, bolt release must be pressed, etc. Circuitry design ensures every trigger pull results in a full cycle Simple take-down procedure Quick-removable cylinder