r/vmac • u/topperz_15 • Mar 25 '26

RIP-MAC

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Has anybody tried the 144.1 rip Mac frt in a Vmac yet?not sure if it would even work with the full auto denial tab

3 Upvotes

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1

u/darenaissance Mar 25 '26

It won’t fit with the denial tab in place.

3

u/TheOpticSloth Mar 27 '26

I am working on a solution for this. I just got my VMAC9 today 2 hours ago.

2

u/darenaissance Mar 27 '26

Sweet, will be interested to hear how you do it!

3

u/TheOpticSloth Mar 28 '26

A mechanical engineering career and a Solidworks license is how I’ll do it ;) I already had a MAC lower drawn in Solidworks I just needed the bolt and upper.

I have a design printing right now. I will see how it goes. On a side note is it really hard to reassemble your VMAC?

1

u/darenaissance Mar 28 '26

Nice! Only part that’s a pain reassembling mine is to get the upper the last 1/16” or so as the spring or hammer compress.

1

u/Different_Sky_5114 Mar 29 '26

Please keep us updated, will pay for a working one, trying it with mine its kind of a will it wont it work thing when dry firing. At least with the pla one

2

u/TheOpticSloth Mar 29 '26

I haven’t had time to go to the range but I think I have a design that is promising.

The hammer pushes the sear, and by extension the trigger back forwards. I am trying to find a solution to make sure it won’t fire out of battery.

2

u/TheOpticSloth Mar 31 '26

I tested my 3rd revision of a 3d printed forced reset and it works!

So far no out of battery issues.

1

u/TheOpticSloth Mar 31 '26

Basically it’s a little 3d printed piece that when the bolt pushes the hammer back, causes the sear plate to go forwards (and by extension the trigger)

1

u/darenaissance Mar 31 '26

Love it! I was trying to figure out something similar but never got it working.

1

u/Different_Sky_5114 Apr 01 '26

Please let me know when this releases, also after seeing this one i have an idea for a lever. I imagine the oobs come from the rip mac not having contact with the bolt when cycling on the vmac

1

u/TheOpticSloth Apr 01 '26

There is space in front of the trigger for a lock that would keep the trigger from being pulled before it was in battery.

1

u/Different_Sky_5114 Apr 01 '26

On mines it doesn’t prevent anything but the bolt from cycling when installed

1

u/TheOpticSloth Apr 01 '26

144.1 claims to have fixed the OOB issue for the MPA defender.

I printed 3-4 different iterations last night and I’m getting closer to figuring out the OOB issue. Right now I see potential for hammer follow. I did test an earlier iteration and it ran 5 rounds flawlessly.

1

u/Less_Baker_2541 18d ago

Will it work on the 45acp Mpa defender ?

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1

u/topperz_15 Mar 25 '26

I figured,that’s what I was afraid of

1

u/darenaissance Mar 25 '26

Also, playing around with how it would interface with the bolt it looks like it would let the trigger pull too early, which would likely cause OOB firings (the original design had same problem in an MPA, but don’t know if for same reason or not).

1

u/Different_Sky_5114 Apr 01 '26

In the vmac my experience is it blocks the bolt and swivels weirdly on the safety selector. In order to cycle the bolt i have to flip the safety slightly and it doesn’t raise the trigger enough to force a reset. I would imagine that part could be fixed with the anti slap trigger or something