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A spacer for adjusting initial velocity compatible with various bolt action large diameter spring standards of Φ13mm.
Can be used with the following piston internals and spring guides:
Each sheet is 2mm thick and weighs 0.19g.
Each package contains 10 pieces, and the initial velocity can be fine-tuned by increasing or decreasing the number of pieces.
For detailed instruction manual and usage instructions, please click here.List of compatible models and parts (as of December 13, 2022)
