Hello everyone!

Available for download is a .380 "optimized" version of our spin on the ATRH V3 Lower Receivers for the VZ61 / TA61 platform.

As the title suggests, this is an Open-Beta. .380 Typically has around 20% more energy compared to the hot-euro spec .32acp we've been testing with, requiring additional reinforcement in the rear buffer tower area.

The 380 bolts lack the cuts for the rate-reducer to function, allowing us to fill in that entire area with material. I personally put around 350 rounds of winchester 380 in a single range-trip, before dropping it (with the upper hinged open) causing the front take-down area to crack.

I'm fairly confident this design should hold up, but please exhibit caution. I initially test fired mine off to my side to prevent injury.

We need someone with a crazy stockpile of 380 to assist in the testing.

Print settings:

• Flat on bed
• 5 walls
• 100% infill
• 0.16mm Layer Height

I'm personally using annealed Fiberon PA6-CF20 for testing.

LBRY Tags: ta61; vz61; 3d printed; fosscad; titus arms