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NEW J-Mac Upgrades!!!

MuzzleBroke
Published on May 16, 2025
Category: Tactical & Gear
Duration: 54:00

This video showcases new JMAC Customs upgrades for the Rifle Dynamics Quick Hatch AK. The host details the installation and benefits of the Armbar stock, billet pistol grip, and HRD hand stop, emphasizing their lightweight and low-profile nature, ideal for a backpack or compact rifle build. The video also briefly touches on the CZ75 SP1 Shadow ACU and Extar EP9.

Tags

Rifle Dynamics Quick Hatch
JMAC Customs Armbar Stock
JMAC Customs Billet Pistol Grip
JMAC Customs HRD Hand Stop
AK Platform
Rifle Modification
Lightweight Build
Backpack Gun
CZ75 SP1 Shadow ACU
EP9 Extar
Goon Tape Camo

Quick Summary

The JMAC Customs Armbar stock is an incredibly lightweight and low-profile option for AK platforms. It folds to the side and its butt pad flips upward, significantly enhancing storability and making the rifle more compact, ideal for a backpack gun role.

Chapters

  1. 00:00Introduction to JMAC Customs Upgrades
  2. 00:07JMAC Armbar Stock Features
  3. 00:23JMAC Billet Pistol Grip
  4. 00:37JMAC HRD Hand Stop
  5. 00:59CZ75 SP1 Shadow ACU Overview
  6. 01:17Extar EP9 Introduction
  7. 01:44Quick Hatch Favorite Gun Discussion
  8. 01:5620-Round Magazine Swap
  9. 02:17Backpack Gun Concept
  10. 02:27Potential JMAC Muzzle Device
  11. 03:07Rifle Dynamics Quick Hatch Value
  12. 03:35Caliber Options for Quick Hatch
  13. 04:07CZ75 SP1 Shadow ACU Range Review Recap
  14. 04:55Upcoming EP9 and M90 Range Reviews
  15. 05:07New 2011 Coming to Channel
  16. 06:04Adjustable Gas Block Criticism
  17. 07:06Quick Hatch Build Breakdown
  18. 07:08Griffin Armament Muzzle Brake
  19. 07:14Suppressing the Quick Hatch
  20. 07:25JMAC Finger Stop Application
  21. 07:28Rail Scales and Sights
  22. 07:33Magpul 20-Rounder
  23. 07:39JMAC Safety Stud
  24. 08:03Suppressor Approval Times
  25. 08:27Spray Painted Magazine Projects
  26. 08:42Goon Tape Camo Application
  27. 09:11JMAC Customs Upgrades Showcase
  28. 09:20Stock Folding Mechanism
  29. 09:34Shooting Videos Availability
  30. 09:49Quick Hatch Thousand Round Review Idea
  31. 10:18CZ75 Performance and Reliability
  32. 11:33CZ75 Role: Competition vs. EDC
  33. 12:36EP9 Thousand Round Review Hopes
  34. 13:02Goon Tape German Flecktarn Camo
  35. 13:16PDW Weapon Discussion (MP5, P90, Vector)
  36. 14:17PTR MP5 Clone Pricing
  37. 14:22JMAC Customs Upgrades Recap
  38. 14:37Weight Reduction from Upgrades
  39. 15:12PTR Pricing Discussion
  40. 15:25Firearm Weight Estimation
  41. 15:40Welcome to Muzzle Broke Channel
  42. 15:49MP7 vs. MP5 vs. 45 ACP
  43. 16:01USPSA with CZ75
  44. 16:23CZ Customs Build Reliability
  45. 17:02Porting Discussion
  46. 17:17Stock Installation Mistake
  47. 17:46EP9 Polymer Construction
  48. 18:05EP9 Shooting Flatness
  49. 18:30Quick Hatch Caliber: 7.62x39
  50. 18:35CZ and EP9 Caliber: 9mm
  51. 18:40Goon Tape Appreciation
  52. 18:53CZ75 Low Bore Axis
  53. 19:13Goon Tape Collaboration
  54. 19:35Shadow 2 vs. Tactical Sport Orange
  55. 19:42CZ75 SP1 ACU Shadow Price
  56. 20:00Rifle Dynamics Airsoft Partnership
  57. 20:08Current Giveaway Details
  58. 20:26CZ Bore Axis Discussion
  59. 21:07CZ Customs Build Summary
  60. 21:26Rifle Dynamics Quick Hatch with Upgrades
  61. 21:37Spray Painted Mag Appreciation
  62. 21:48Recommendations for Quick Hatch Upgrades
  63. 22:04Quick Hatch as Favorite Gun
  64. 22:20Previous Shovel Handle Stock
  65. 22:32Future Stock Options Video
  66. 23:06EP9 by Extar Overview
  67. 23:17Arisaka Hand Stop
  68. 23:199mm Suppressor and Flashlight
  69. 23:30EP9 Cleaning Before Review
  70. 23:49EP9 Weight
  71. 24:10CZ75 SP1 ACU Shadow Review
  72. 24:21Rifle Dynamics Quick Hatch with JMAC
  73. 24:45Muzzle Broke Stickers
  74. 25:06Birthday Plans
  75. 25:34Super Safeties Opinion
  76. 26:11FRTs vs. MCDs
  77. 26:28Welcome to Muzzle Broke Channel
  78. 26:40Farewell and Travel
  79. 26:49Upcoming Shorts Content
  80. 27:01Vortson Machine Gun Conversion Device
  81. 27:13Auto Sears and Switches Legality
  82. 27:28Viewer Introduction
  83. 27:32Volcan and Tandem Cross Lower
  84. 27:49Gun Giveaway Details
  85. 28:09Glock 17 vs. Glock 19 Preference
  86. 28:39CZ75 SP1 ACU Shadow Recap
  87. 29:19Rifle Dynamics Quick Hatch Barrel Length
  88. 29:36EP9 Barrel Length
  89. 29:55JMAC Customs Upgrades on Quick Hatch
  90. 30:12JMAC Folding Stock Mechanism
  91. 30:42Brace vs. Stock Discussion
  92. 31:07Welcome to Muzzle Broke Stream
  93. 31:26Content Variety on Muzzle Broke
  94. 31:29Future Quick Hatch Upgrades
  95. 31:39Potential JMAC Muzzle Device
  96. 31:48Visit to Israel
  97. 31:57Muzzle Broke Merchandise
  98. 32:13Giveaway Entry Bonus
  99. 32:55JMAC Stock Comparison
  100. 33:31Liking the Stream
  101. 33:42Stream Frequency
  102. 33:52Field Trip Plans
  103. 34:06Sig P320 Hate Discussion
  104. 34:36P320 Shooting Impression
  105. 34:53JMAC Components Identified
  106. 35:16P320 Negligent Discharge Concerns
  107. 35:27P320 Feel vs. CZ Quality
  108. 36:04Sig Brand Perception
  109. 36:20P320 vs. Glock Clone
  110. 37:21Mars Trigger FRT
  111. 37:27Best Do-All Handgun Discussion
  112. 38:069mm PCC: Extar EP9
  113. 38:20CZ75 SP1 ACU Shadow Center
  114. 38:26Rifle Dynamics Quick Hatch with JMAC
  115. 38:33Stream Timing
  116. 38:46CZ and AK Appreciation
  117. 39:05Viewer Name Pronunciation
  118. 39:07Spray Painted Mag
  119. 39:16JMAC Customs Shoutout
  120. 39:35Glock 17 Gen 3 vs. 2011 Debate
  121. 39:472011 vs. CZ75 Shooting Experience
  122. 40:03Sig 226 ZEV Build
  123. 40:11Springfield Prodigy Comparison
  124. 40:25Prodigy Build Details
  125. 40:34CZ75 Appreciation
  126. 40:39Honest Outlaw and CZ Influence
  127. 41:05Camo Next to EP9
  128. 41:18Rifle Dynamics Quick Hatch Camo
  129. 41:23CZs Made for War
  130. 41:27Stock CZ75 Price Inquiry
  131. 41:42HK90 Opinion
  132. 41:50CZ Knowledge Exchange
  133. 42:04CZ75 SP1 ACU Shadow Naming
  134. 42:15Stock Installation Retardation
  135. 42:28Favorite Pistol Optic Discussion
  136. 43:09Sell Three for BP9A1?
  137. 43:11JMAC Muzzle Brake and Blast Shield
  138. 43:18Little Gun Identification
  139. 43:35Optics vs. Furniture Cost
  140. 43:43P320 Identification
  141. 43:50Vision Enhancement from Optics
  142. 43:529mm vs. 40 Caliber
  143. 44:06Million Dollars for Gender Change?
  144. 44:11Welcome to Muzzle Broke Channel
  145. 44:23Life Advice Request
  146. 44:30Shot Placement Over Caliber
  147. 44:35Giveaway Items
  148. 44:51Barrett M82 Ownership
  149. 45:00EP9 Price
  150. 45:10Civilian M249 Cost
  151. 45:30Welcome to Muzzle Bro Channel
  152. 45:48Today's Firearms Showcase
  153. 46:10Optics vs. Iron Sights
  154. 46:20Hannah Montana Style Co-Witness
  155. 46:2340 vs. 9mm Ballistics
  156. 46:27FRTs: Range Toy or Practical?
  157. 46:43Glock 30 as First Handgun
  158. 46:52EDC Red Dot Preference
  159. 47:06Shoutout to Below Average Utah Dad
  160. 47:16AR10 Build Progress
  161. 47:29Glock 44 vs. Glock 40
  162. 47:37Dropping Nuts
  163. 47:39Quick Hatch with JMAC Upgrades
  164. 47:45Quick Hatch Caliber: 7.62x39
  165. 47:50Quick Hatch Available Calibers
  166. 48:007.62x39 Practicality in Short Barrels
  167. 48:107.62x35 (300 Blackout) Inquiry
  168. 48:14CZ75 SP1 ACU Shadow Center
  169. 48:20EP9 by Xtar
  170. 48:24EP9 Thousand Round Review Filming
  171. 48:26M90 Thousand Round Review
  172. 48:44Bug Spray Reminder for Range Day
  173. 48:502A All Day
  174. 48:54300 Blackout Ownership
  175. 49:00AR Home Defense Build
  176. 49:03Glock 48
  177. 49:08AK in 5.56 Sacrilege?
  178. 49:135.56 AK Range Review
  179. 49:17Zastava M90
  180. 49:23AKs in 7.62x39
  181. 49:30Welcome to Muzzleberg Channel
  182. 49:36Giveaway Entry Bonus
  183. 49:45Winnable Giveaway
  184. 49:56AKs are Badass
  185. 50:01Favorite Gun Platform
  186. 50:05Favorite Gun of All Time: PPSh-41
  187. 50:10Call of Duty Influence
  188. 50:13PPSh-41 in Black Ops 6
  189. 50:17Russian Guns Appreciation
  190. 50:40PPSh-41 Parts Kit Desire
  191. 50:53JMAC Customs Upgrades Recap
  192. 51:07Tiger Stripe Orange Mag
  193. 51:12CZ Custom CZ75 ACU Shadow Review
  194. 51:23EP9 by Xtar Thousand Round Review
  195. 51:303D Printing and the Gun Industry
  196. 51:51Building ARs at Home
  197. 52:113D Printing Polymer Guns
  198. 52:223D Printed Glock Frame
  199. 52:35Welcome to Muzzle Broke Live Stream
  200. 52:46Giveaway Entry Requirement
  201. 52:57New Gun Coming: 2011
  202. 53:05Baison Origin Story
  203. 53:1032 ACP Rifle vs. 9mm
  204. 53:13Glock 19 vs. Glock 45 vs. Glock 47
  205. 53:39Like the Stream and Subscribe
  206. 53:51Later Live Stream Possibility
  207. 54:02P320 Unjustly Hated?
  208. 54:13Dislike for P320 Shooting Dynamics
  209. 54:36P320 Feel and Quality
  210. 54:53J-Max vs. J-Mac
  211. 55:16P320 Negligent Discharge Concerns
  212. 55:33Sig 226 and P365 Preference
  213. 56:04Sig Hate Wildness
  214. 56:20P320 vs. Glock Clone Preference
  215. 57:06P220 All Steel Borrow
  216. 57:21Mars Trigger FRT Ghosting
  217. 57:27Best Do-All Handgun Market
  218. 57:37Do-All Gun Challenges
  219. 57:56Glock 17 Reliability
  220. 58:01HK as a Pick
  221. 58:03Cigarette Glock
  222. 58:069mm PCC: Extar EP9
  223. 58:20CZ75 SP1 ACU Shadow Center
  224. 58:26Rifle Dynamics Quick Hatch JMAC Upgrades
  225. 58:30Viewer Greeting
  226. 58:46CZ and AK Build Appreciation
  227. 58:53Quick Hatch Muzzle Device Hope
  228. 58:59JMAC Customs Furniture
  229. 59:02Viewer Name Pronunciation
  230. 59:05Enjoying the Guns
  231. 59:07Spray Painted Mag Fun
  232. 59:16JMAC Customs Gear Shoutout
  233. 59:22Potential JMAC Muzzle Device Shipment
  234. 59:30JMAC Customs Input Appreciation
  235. 59:33Subscribe to Channel
  236. 59:35Glock 17 Gen 3 vs. 2011 Wave
  237. 39:472011 vs. CZ75 Shooting Experience
  238. 40:03Sig 226 ZEV Build
  239. 40:11Springfield Prodigy Comparison
  240. 40:25Prodigy Build Details
  241. 40:34CZ75 Appreciation
  242. 40:39Honest Outlaw and CZ Influence
  243. 41:05Camo Next to EP9
  244. 41:18Rifle Dynamics Quick Hatch Camo
  245. 41:23CZs Made for War
  246. 41:27Stock CZ75 Price Inquiry
  247. 41:42HK90 Opinion
  248. 41:50CZ Knowledge Exchange
  249. 42:04CZ75 SP1 ACU Shadow Naming
  250. 42:15Stock Installation Retardation
  251. 42:28Favorite Pistol Optic Discussion
  252. 43:09Sell Three for BP9A1?
  253. 43:11JMAC Muzzle Brake and Blast Shield
  254. 43:18Little Gun Identification
  255. 43:35Optics vs. Furniture Cost
  256. 43:43P320 Identification
  257. 43:50Vision Enhancement from Optics
  258. 43:529mm vs. 40 Caliber
  259. 44:06Million Dollars for Gender Change?
  260. 44:11Welcome to Muzzle Broke Channel
  261. 44:23Life Advice Request
  262. 44:30Shot Placement Over Caliber
  263. 44:35Giveaway Items
  264. 44:51Barrett M82 Ownership
  265. 45:00EP9 Price
  266. 45:10Civilian M249 Cost
  267. 45:30Welcome to Muzzle Bro Channel
  268. 45:48Today's Firearms Showcase
  269. 46:10Optics vs. Iron Sights
  270. 46:20Hannah Montana Style Co-Witness
  271. 46:2340 vs. 9mm Ballistics
  272. 46:27FRTs: Range Toy or Practical?
  273. 46:43Glock 30 as First Handgun
  274. 46:52EDC Red Dot Preference
  275. 47:06Shoutout to Below Average Utah Dad
  276. 47:16AR10 Build Progress
  277. 47:29Glock 44 vs. Glock 40
  278. 47:37Dropping Nuts
  279. 47:39Quick Hatch with JMAC Upgrades
  280. 47:45Quick Hatch Caliber: 7.62x39
  281. 47:50Quick Hatch Available Calibers
  282. 48:007.62x39 Practicality in Short Barrels
  283. 48:107.62x35 (300 Blackout) Inquiry
  284. 48:14CZ75 SP1 ACU Shadow Center
  285. 48:20EP9 by Xtar
  286. 48:24EP9 Thousand Round Review Filming
  287. 48:26M90 Thousand Round Review
  288. 48:44Bug Spray Reminder for Range Day
  289. 48:502A All Day
  290. 48:54300 Blackout Ownership
  291. 49:00AR Home Defense Build
  292. 49:03Glock 48
  293. 49:08AK in 5.56 Sacrilege?
  294. 49:135.56 AK Range Review
  295. 49:17Zastava M90
  296. 49:23AKs in 7.62x39
  297. 49:30Welcome to Muzzleberg Channel
  298. 49:36Giveaway Entry Bonus
  299. 49:45Winnable Giveaway
  300. 49:56AKs are Badass
  301. 50:01Favorite Gun Platform
  302. 50:05Favorite Gun of All Time: PPSh-41
  303. 50:10Call of Duty Influence
  304. 50:13PPSh-41 in Black Ops 6
  305. 50:17Russian Guns Appreciation
  306. 50:40PPSh-41 Parts Kit Desire
  307. 50:53JMAC Customs Upgrades Recap
  308. 51:07Tiger Stripe Orange Mag
  309. 51:12CZ Custom CZ75 ACU Shadow Review
  310. 51:23EP9 by Xtar Thousand Round Review
  311. 51:303D Printing and the Gun Industry
  312. 51:51Building ARs at Home
  313. 52:113D Printing Polymer Guns
  314. 52:223D Printed Glock Frame
  315. 52:35Welcome to Muzzle Broke Live Stream
  316. 52:46Giveaway Entry Requirement
  317. 52:57New Gun Coming: 2011
  318. 53:05Baison Origin Story
  319. 53:1032 ACP Rifle vs. 9mm
  320. 53:13Glock 19 vs. Glock 45 vs. Glock 47
  321. 53:39Like the Stream and Subscribe
  322. 53:51Later Live Stream Possibility

Frequently Asked Questions

What are the key JMAC Customs upgrades for the Rifle Dynamics Quick Hatch?

The JMAC Customs upgrades featured include the Armbar stock, a billet pistol grip, and the HRD (Hand Retention Device) which functions as an M-LOK finger stop. These components aim to reduce weight and improve ergonomics.

How does the JMAC Customs Armbar stock improve the Rifle Dynamics Quick Hatch?

The Armbar stock is highlighted as an incredibly lightweight and low-profile option. It folds to the side and its butt pad flips upward, significantly enhancing storability and making the rifle more compact, ideal for a backpack gun.

What are the performance characteristics of the CZ75 SP1 Shadow ACU after upgrades?

The CZ75 SP1 Shadow ACU, when heavily upgraded, shoots incredibly fast and flat. However, it experienced reliability issues, gumming up and failing to feed rounds around the 600-round mark, making it more suited for competition or range use than duty.

What is the weight and feel of the Extar EP9?

The Extar EP9 is described as a very lightweight polymer-frame 9mm PCC, weighing around 4.3 lbs. It's noted for shooting surprisingly flat, even flatter than some ported handguns.

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