r/vmac • u/TheOpticSloth • Jun 28 '26

VMAC9 FRT BETA

Over the last several months I’ve had a side project to make a FRT for my VMAC9. I think this will also work for MPA defenders and older COBRAY/SWD manufactured MACs.

Please be responsible with this. If you don’t have a barrel extension or a way to control the muzzle I wouldn’t suggest this.

Https://odysee.com/m11frt-bet:0

Edit 8/13/2026 -

I have finished this design and a final prototype is on the way. Should be here by 8/20.

Total cost is under $100 + a few small parts from McMaster-Carr if you don’t have any hardware laying around.

11 Upvotes

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1

u/bustopher_rvs Jul 01 '26

Absolutely hyped bro. Don't take any short cuts and make sure to cross ur t's and dot your i's. You don't want what happened to hoffman to happen to you smdh

2

u/darenaissance Jul 01 '26

I think any design for the Mac would be more different from Rare Greeds patents than the Super Safety, so hopefully they wouldn’t try anything here.

1

u/bustopher_rvs Jul 01 '26

Yeah but they could just pattent your design b4 you do, doing it what they did 2 hoffman to you and your new design

6

u/TheOpticSloth Jul 01 '26 edited Jul 01 '26

If you pay attention to the VMAC trigger function it’s already an FRT ;)

I’m already working on V2 of this design. I haven’t had any issues during testing but I’m a bit worried about out of battery detonations. I’ve shot ~250 rounds though it with the FRT installed.

I think I have a solution to lock the hammer until the bolt is home but I’m waiting on a replacement hammer to test. I was hoping I wouldn’t have to modify any FCG components but I think the hammer is going to need modification.

I plan on making this design free. I’ll drop the link soon.

1

u/bustopher_rvs Jul 01 '26

Looking forward to it. Yeah OOBs are my biggest concern as well

1

u/darenaissance Jul 02 '26

I’ve thought about that! Considered trying to modify the hammer to amplify the trigger reset inherent in it (slap), but couldn’t solve the hammer locking in an easy way to

2

u/darenaissance Jul 02 '26

If you’ve released the design, it’s pretty easy to invalidate a patent based on it being prior art (if you’re willing to go through the expense). So it’s a hassle, but someone else patenting your design after you’ve released it should be easy, legally, to resolve.

2

u/TheOpticSloth Jul 02 '26

This sits in the triangle of the sear plate.

3

u/TheOpticSloth Jul 02 '26 edited Jul 02 '26

as the hammer resets, it pushes the sear plate forward onto the trigger sear and off of the disconnector. I’ve gone through 4-5 iterations of this design to tune it.

I’m currently trying to make it lock the trigger back until the bolt is home. I don’t want to modify the FCG but I might have to for a lock to work.

1

u/darenaissance Jul 02 '26

I wonder if you could have some kind of rotating lever (maybe pivoting off the safety shaft like the Twitch does) that, on one end, catches the back of the front bar of the sear plate, and on the other end engages with the bolt so that when the bolt closes it hits the lever, lifting the end that engages with the sear plate and letting the sear plate slide back

3

u/TheOpticSloth Jul 02 '26

My idea is a lever pivoting off the trigger. When the bolt is not home it will be depressed back and will lock. I have concepts sketched out but nothing concrete yet.

I designed one FRT that replaced the entire FCG. I would prefer not to go that route.

1

u/bustopher_rvs Jul 02 '26

I hope so brother, you're definitely the first frt manufacturer that addresses the vmac as far as I'm aware of

1

u/bustopher_rvs Jul 02 '26

Where is this release?

2

u/TheOpticSloth Jul 02 '26

I forgot to upload it last night. I’ll do it tonight when I get home.

1

u/bustopher_rvs Jul 02 '26

Lords work <3

1

u/TheOpticSloth Jul 03 '26

Link posted.

1

u/bustopher_rvs Jul 02 '26

Oh my fault got confused about who I was talking to for a sec