The Y22 Hammer (Yeet22) a fully 3D-printable, DIY self-loading .22 LR pistol.

Type: Fully 3D-printable self-loading .22 Long Rifle (LR) pistol.
Material Requirements: Most components outside of the barrel, specific springs, liners, and fasteners are made of printed plastic (recommended in high-strength filaments like PLA+)

Fire Control: Features an unconventional fire control group with large sear surfaces and a specialized hammer-fired mechanism designed for 3D-printed receiver geometries.

Assembly: Requires basic tools, post-processing of printed holes (chasing with drills/files), and a rifled or DIY-lined barrel assembly (such as using electrochemical machining or an epoxy-affixed liner)

Legal Context: Legality varies significantly by jurisdiction; builders are strictly required to verify local firearms manufacturing and self-compliance laws before sourcing or assembling parts