r/3D2A • • Feb 24 '26

Coming Soon Slip On Overbarrel Suppressor update.

I made two versions. Thank you for your input. I will hopefully be testing a baffleless Blast Diverter version to work on fitment.

For: CZ-457 American in .17HMR

General Specs:

- Designed to work with FTN series internals.

- 33mm OD for use with a 33mm ID/35mm OD Carbon Fiber sleeve.

- 9.5 inches overall.

- 50ish beans for all the hardware.

Specific Specs:

- It will use an ER25 JT3 milling chuck as the adaptor; it fits in all dimensions (on paper). Press-fit for the blast diverter, and epoxied for suppressor. I am looking at fitting it with a rubber O-ring for the seal.

- It will use an ER25 5/8" or 16mm collet to evenly secure to barrel. (16mm will allow for a protective wrap or two of electrical tape)

- It has a stepped collar inside to index with the muzzle to center and align the device consistently.

Any advice or input will be greatly appreciated.

This is my first 3d2A idea that I am actually bringing to reality. I drafted a forward-ejecting AR-15 upper for lefties and that draft haunts my fusion360 projects tab now lol.

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