TM G19 Gen4 SS Guide Rod Set - Black aep inner barrel upgrade Attention & Installaton Guide:

Attention & Installaton Guide:

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the one with 300mm barrel always need harder spring to achieve the same J/FPS than longer barrels

TM G19 Gen4 SS Guide Rod Set - Black aep inner barrel upgrade Attention & Installaton Guide:Highlighted features Stainless Steel material with CNC machined 4 buffers for modification to shorten the cycling Include Enhance Recoil Spring Enhance the reaction force to speed up the blowback cycle 3 Colors available: Silver, Titanium Black and Titanium Gold For TM G19 Gen4 **Important Notice** It may has a condition that your pistol cannot feed the BB bullet due to lightweight gas supply. You just simple remove a spacer to solve the issue.