Need a little help quick....

[SigfanUSAF]

I have a Century CETME rebuilt on a JLD PTR 91 receiver converted to an HK-51 clone (16.25" bbl). I'm thinking of changing the cocking tube and forend lengths again. Can someone with a full length G3/PTR slimline forend measure the length of the forend from the front of the receiver to the front of the forend, and then from the front of the receiver to thefront of the triple frame for me? Any help would be appreciated.
Thanks in advance.

 

[SigfanUSAF]

PLEASE?

 

[SigfanUSAF]

I have posted this question on 4 different forums, no one has an answer. I know there is SOMEONE out there with a slimline forend and a tape measure, right? I'll be eternally greatful....................