I highly recommend that you watch my previous QBZ191 video first, before watching this one.

Previous video:    • A comprehensive look at the QBZ 191 s...  

TABLE OF CONTENTS:

0:00 INTRODUCTION
1:07 DISCLAIMERS
1:53 1. CORRECTION OF MINOR MISTAKES AND ADDITIONAL DETAILS
2:02 1a. Designations
2:25 1b. Muzzle devices
2:43 1c. Bolt release
3:09 1d. Magazine release
3:19 1e. Magazine
4:01 1f. QMK171A scope
5:20 1g. DMR scope
6:34 1h. IR5118 thermal scope
7:21 1k. Cleaning kit
8:01 1l. Round counter
8:22 1m. Vertical foregrip
8:51 2. PATENT DOCUMENTS
9:13 2a. Front sight
10:08 2b. Rear sight
11:38 2c. Handguard reinforcement sleeve (Rifle & Carbine)
13:12 2d. DMR Handguard
13:49 2e. Gas system overview
14:15 2f. Singleport gas block
16:34 2g. Dualport gas block
18:00 2h. DMR gas block
18:35 2k. Firing pin retaining pin
20:49 2l. Bolt carrier
21:14 2m. Anti preengagement mechanism
23:38 2n. Elongated cam slot
24:55 2o. Dual oblique extractor springs
26:27 2p. Extractor pin
26:57 2q. Bolt head
27:38 2r. Fire control group
31:51 CONCLUSIONS

SOURCE LIST:

[1] https://www.bilibili.com/video/BV1rb4...
[2] https://www.sinodefenceforum.com/t/qb...
[3] https://www.patentguru.com/cn/CN21077...
[4] https://www.patentguru.com/cn/CN11332...
[5] https://www.patentguru.com/cn/CN11142...
[6] https://www.patentguru.com/cn/CN21053...
[7] https://weibo.com/tv/show/1034:466660...
[8] https://www.bilibili.com/video/BV1MD4...
[9] https://www.sinodefenceforum.com/t/qb...
[10] https://www.sinodefenceforum.com/t/qb...
[11] https://www.sinodefenceforum.com/t/qb...
[12] https://www.sinodefenceforum.com/t/qb...
[13]    • 《经济半小时》 “轻”装上阵的秘密 20191030 | CCTV财经  
[14] https://www.sinodefenceforum.com/t/qb...
[15] https://www.sinodefenceforum.com/t/qb...
[16] https://www.sinodefenceforum.com/t/qb...
[17] https://www.patentguru.com/CN305949531S
[18] http://pewpewpew.work/china/rifle/qbz...
[19] https://ddlaser.tezhongzhuangbei.com/...
[20] https://www.sinodefenceforum.com/t/pl...
[21] https://www.sinodefenceforum.com/t/qb...
[22] https://www.sinodefenceforum.com/t/pl...
[23] https://weibo.com/p/1005056440621917/...
[24] https://www.sinodefenceforum.com/t/qb...
[26] My Dressup Darling – Season 1 Episode 2
[27] https://www.patentguru.com/cn/CN20884...
[28] https://www.sinodefenceforum.com/t/qb...
[29] http://pewpewpew.work/china/sr/qbu88/...
[30] http://gearkr.com/?p=60121
[31] https://www.bilibili.com/video/BV1EA4...
[32] https://www.springfieldarmory.com/he...
[33] https://tv.cctv.com/2021/10/23/VIDEti...
[34]    • New Springfield Armory Hellion : VHS ...  
[35] https://wantubizhi.com/pic/951%E7%9E...
[36] https://www.sinodefenceforum.com/t/qb...
[37] https://www.bilibili.com/video/BV1rf4...
[38] https://www.sinodefenceforum.com/t/qb...
[39] http://pewpewpew.work/china/rifle/qbz...
[40] https://www.patentguru.com/cn/CN10732...
[41] https://www.patentguru.com/cn/CN20713...
[42] World of Guns
[43] https://www.thefirearmblog.com/blog/2...
[44]   / 1421046463459647498  
[45] https://www.thefirearmblog.com/blog/2...
[46]    • Enhanced AR/M16/M4 Bolts and Bolt Car...  
[47] https://www.patentguru.com/US20220110...
[48] https://www.sinodefenceforum.com/t/pl...
[49] https://www.patentguru.com/cn/CN20828...
[50]    • How an AK 47 works  
[51] https://www.thefirearmblog.com/blog/2...
[52] https://www.recoilweb.com/czbren805...
[53]    • 【2019新枪】阅兵步枪 Norinco QBZ191 China 20...  
[54]    • SCP Containment Breach Femur Breaker ...  
[55] https://www.thefirearmblog.com/blog/2...
[56] https://www.thefirearmblog.com/blog/2...
[57] https://www.bilibili.com/video/BV1Fb4...
[58] https://m.weibo.cn/detail/47050390443...