M400卡宾枪是西格公司推出的一款新型卡宾枪,采用导气管式自动原理,发射5.56mm NATO弹。大量使用碳纤维材料已经成为近年来武器减重的一个趋势,该枪的护手和枪托均采用这种材料制成,有效地减小了武器质量,携行更加轻松。该枪的机匣、发射机构与AR系基本相同,枪 The M400 carbine is a new carbine launched by SIGGER and uses 5.56mm NATO bombs on a gas-guided automatic principle. The heavy use of carbon fiber materials has become a trend of weapon weight reduction in recent years. Both the hand guard and the buttstock of this gun are made of this material, which effectively reduces the quality of weapons and makes carrying easier. The gun casing, firing mechanism and AR Department basically the same, gun