The XM29 was intended to be a shoulder-fired, semi-automatic grenade launcher in 20 mm calibre and to incorporate a compact, lightweight 5.56 mm rifle as a back-up weapon.
XM 29确定为一种抵肩射击，20毫米口径单发自动榴弹发射器并结合一个紧凑型，重量轻的5.56毫米步木仓做为后备武器。
This paper introduces various influence factors that lead to the misfire of charging delay tube for firing device of rifle grenade, and the way to solve it was found.
介绍了枪榴弹发火件装药延期管瞎火的各种影响因素，找出了解决方法，并进行试验结果分析。
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