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and long inner barrel setups
noise-sensitive setups
5" (variant-dependent)
Application: Air seal improvement / leak prevention
allowing you to fine-tune your response with realistic resistance and tactile click
RetroArms CNC Low Profile Bushings (8mm) Shim Sets and long inner barrel setupsThe RetroArms CNC Low Profile Bushings (8mm) are precision engineered gearbox components designed for smooth gear rotation, maximum durability, and precise alignment in AEG gearbox builds. Machined from high quality steel, these bushings provide a tight, stable fit that minimizes friction and play between the gears and the gearbox shell. The low profile design improves internal clearance, making them ideal for advanced setups with tight tolerances or
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