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。

youdao

Maintaining his situational awareness, Staff Sgt. Miller immediately jumped into his vehicle's turret and engaged the enemy with its mounted MK19 40mm automatic grenade launcher.

意识到处境不妙，米勒上士立即跳进他的汗马车炮塔里，抓起MK19式40毫米自动榴弹发射器，向游击队展开猛烈轰击。

youdao

On other convoys along those same roads, Marissa's husband, Specialist Charlie Bootes, manned a Mark-19 fully automatic grenade launcher.

NPR: Waiting and Dreading: Families in War Time

In the Uruzgan incident on Tuesday afternoon, Australian officials said an Afghan soldier fired on colleagues with an automatic weapon and a grenade launcher at a patrol base in the Charmestan region, north-east of Tarin Kot.

BBC: Afghanistan clash 'kills dozens of Taliban' in Paktika