

at least 12 walls 100% infill. trigger guard/magwell bottom flat on plate. tree supports. mag catch print face up same settings, w normal supports. an ar9 ejector like this should work. shop around though as this is just the first link from a search engine.
https://zrtacticalsolutions.com/shop/firearm-parts/ar15/ar9-ejector
for one with lrbho you need to order a Jacob Grey kit.
LBRY Tags: mat9; matador; spinn360
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