This is a kit comes with a perfect combination of power and smoothness. The package contains :
1. Spring guide [back and front [Material :Delrin ]
2. Piston SEAL
3. Spring and
4. Lube (Moly, Spring lube, Seal Lube enough for tune one gun)
** The color of rear guide may vary.
*** Please note: It will take 2 working days for shipping
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