The pistol's strong blow-back nearly made him lose his grip due to the design flaw.

blow-back 是由 blow（打击、冲击）和 back（向后）组成的复合名词，字面意思是"向后冲击"。 在枪械术语中，blow-back 特指"后坐力"，即枪械发射时产生的向后反冲力。