This is the 3rd and final installment of my QBZ191 video series. I highly recommend that you watch the previous two parts first before watching this one.

Previous videos:
Part 1    • A comprehensive look at the QBZ 191 s...  
Part 2    • QBZ191  Update / Deep dive [CHECK PI...  

My Instagram page: https://www.instagram.com/cabbage.gun...

TABLE OF CONTENT:
0:00 – INTRODUCTION
1:56 – DISCLAIMER
2:01 – Keyholing issue
3:57 – QMK191 scope
4:12 – QBU191 in the automatic rifleman role
4:40 – Trigger pack
5:24 – Selector shaft alignment cut
5:59 – Auto sear design for safe use
11:10 – Hammer design
12:06 – Bolt tail
15:35 – Locking lug geometry & Primary extraction
17:41 – Extractor pin & Cam lug locking lever
18:07 – Conclusion

SOURCE LIST:
[1] https://www.bilibili.com/video/BV1AG4...
[2] https://www.bilibili.com/video/BV1ku4...
[3] https://www.patentguru.com/CN210165821U
[4]    • QBZ 191 female team training  
[5] https://www.sinodefenceforum.com/t/qb...
[6] https://mp.weixin.qq.com/s/wbrvmuLj2S...
[7] http://pewpewpew.work/ammo/58x42/58mm...
[8] https://www.bilibili.com/video/BV1db4...
[9] https://www.bilibili.com/video/BV1y94...
[10] https://www.bilibili.com/video/BV1X44...
[11] https://www.sinodefenceforum.com/t/qb...
[12]    • 西藏军区某旅QBU191实弹射击训练全自动点射  
[13]    • 新枪入列中国军队新一代枪族震撼登场191系列步枪大量细节曝光透明弹匣...  
[14] https://www.bilibili.com/video/BV1HY4...
[15] https://www.patentguru.com/CN210773665U
[16] World of Guns
[17] https://www.hkpro.com/threads/notesf...
[18] https://www.patentguru.com/CN210533167U
[19] https://www.thefirearmblog.com/blog/2...
[20]    • Checking AR15 Firing Pin Protrusion  
[21] https://www.instagram.com/p/BbxDfYwhT...
[22] https://www.patentguru.com/CN111426234A
[23]    • How an AK 47 works  
[24] https://primeweaponry.com/products/bo...
[25]    • 009 LIGHT MACHINE GUNS 21 06 2014  
[26]    / weaponmechanics  
[27] https://www.patentguru.com/CN212205816U
[28] https://www.bilibili.com/video/BV1Hd4...
[29] https://www.bilibili.com/video/BV1fB4...