Naturally, there will be one type of weapon which is used more by Navy SEALs than any other. This particular weapon is the M4A1 carbine rifle, which is actually a compact version of the M16A4 rifle. The M4A1 was specially designed for Special Operations Forces, which can explain why it gets so much use. Special kits have been developed by the military which make this rifle even more powerful and these M4A1 Accessory Kits can make this rifle even more effective, adaptable, and deadly.