Bi 3681

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BI 3681 is the manufacturer's number from BOYI/D BOYS, well known replica manufacturer. The replica rifle is about 760mm to 840mm depending on stock settings. The rate of fire is about 750 rounds per minute. The velocity of a 0.2g bb leaving the barrel is 320 feet per second with a stock m100 spring. The BI 3681 is a replica of AR-15, The body is made out of metal, however, being a mid-price range replica, the metal is not as sturdy as that used on Classic Army, Tokyo Marui, or other high-end airsoft replicas. Most, if not all, of the parts are compatible with Tokyo Marui upgrades. The front half of the barrel can be unscrewed to turn the the replica into a M733 length rifle.