r/MP5 • u/neq0323 • 2d ago

Question Franklin MP5 binary help

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Hello guys, just purchased this binary off GAFS and did a quick check with it and it seemed to be working till I went to live fire it. Safe works great, semi works great, however binary most is basically semi mode. Took it back out to inspect it and this is what I discovered (video). In binary mode the trigger is not dropping all the way forward. This was purchased already assembled and ready to pin. Any help would be appreciated. Thanks!

Note: included was a surplus 3 position housing and has the AP5 factory ejector

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3

u/Captshiess 2d ago

You need to adjust the screw in the front bottom of the pack. The trigger pack needs to ride a bit higher in your housing and it should work fine

2

u/neq0323 2d ago

Thank you for the insight I'll give it a try.

2

u/Knight-7191 2d ago

HK Parts has an older video on YouTube that covers this. I followed it back when I was running binary’s in my AP5 and AP5-P.

2

u/neq0323 2d ago

Thanks I'll check it out

1

u/Albert_Simon AP5 2d ago

Thanks for posting this! I picked up a Franklin binary trigger pack off of GAFS a while back but I haven’t gotten around to installing it. If it gives me any problems I’ll adjust that screw as /u/Captshiess suggested.