HK German Go-No-Go Feeler Gauge

Description

This factory tool works with all  HK 90 series family of firearms that belong to the 90 series or legacy series of firearms that are roller locked delayed blowback such as the following:

• HK G3, 91, SR9, SAR8, CETME
• HK MP5, 94, MP5K, SP89
• HK93, 33, 53
• Many other clones and customer builds

As covered in the factory MP5 maintenance manual head space is correct when the bolt gap between the bolt head and the bolt carrier amounts to 0.1 mm – 0.5 mm. It may NOT be possible to introduce the 0.5 mm feeler gauge. Anything lower than 0.1 mm should be adjusted to be in compliance with factory HK recommendations.