HK Roller Action Question,HK94, MP5

[Marshal]

How far does the roller stick out of the bolt when in lock mode?

More importantly how far does it travel to unlock?

I have some other dimensions but working on an idea and would like to know this information.

 

[Scsmith42]

I'd have to measure it but the rollers travel around .200 past the bolt, give or take.

 

[Marshal]

Is that free travel or when it's actually locked in the receiver?

 

[Scsmith42]

Is that free travel or when it's actually locked in the receiver?

Free travel.