

Set of three shims to be interposed between piston head and piston to modify/adjust the engagement angle between the first tooth of the piston and the first tooth of the sectional.
The insertion of these shims causes the piston to retract slightly and decreases the engagement angle.
This procedure can increase the reliability of the replica.
When changing from a standard engagement angle (such as MARUI) to a non-standard one, it is advisable to make the appropriate changes to the piston (elimination of the second tooth and possibly reduction of the third).
If you are new to this, it is advisable to consult experienced technicians.
A normal piston head can withstand a maximum of one shim
Technical data
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internal bore: 5 mm
- external diameter: 18 mm
- thickness: 1 mm
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