持枪

Pinyin: chíqiāng
Meaning：Trail arms; carry the rifle
Sentence: 他们被蒙面的持枪歹徒劫持了.They were held captive by masked gunmen.

More:

持：

Pinyin: chī
Meaning: To support; to sustain
Radical: 支
Stokes: 4
Traditional: 支
Common words/Phrase:
支持 [zhīchí] 【support】
支付 [zhīfù] 【pay】
支架 [zhījià] 【bracket】
支出 [zhīchū] 【expense】
支撑 [zhīchēng 【prop up】

枪：

Pinyin: qiāng
Meaning: Spear; rifle; gun
Radical: 木
Stokes: 8
Traditional: 槍
Common words/Phrase:
枪手 [qiāngshǒu] 【gunman】
枪击 [qiāngjī] 【pop; gun down】
枪杀 [qiāngshā] 【gun down】
枪毙 [qiāngbì] 【executed by shooting】
枪战 [qiāngzhàn] 【gunfight】