Source: ATF P 5300.11 · Curios or Relics List · Jan 1972 – Apr 20253,573 entries · 4 sections
The C&R RegisterA finding aid to the ATF Curios or Relics List, for Type 03 collectors
C&R · III · 133

Shattuck “Unique” palm gun

Section III: removed from the NFA, curio or relic under the GCA

Official wording

ATF P 5300.11 · APRIL 2025 EDITION · SECTION III · VERBATIM · PDF P. 44 ↗

Shattuck "Unique" palm gun, cal.’s .25 and .32 rimfire, manufactured by C.S. Shattuck Arms Co., Hatfield, MA, circa 1909-1915.

What this entry requires

  • ATF REQUIRESMade or imported as stated: “manufactured by C.S. Shattuck Arms Co.”
  • ATF REQUIRESMade 1909–1915 (ATF’s dates)ATF: “circa 1909-1915”

Editorial facts · Our research

Country
United StatesBasis: no citation
Manufacturer
C.S. Shattuck Arms Co., Hatfield, MABasis: the ATF wording
Type
PistolBasis: outside reference ¹
Action
OtherBasis: no citation
Caliber
.25 rimfire, .32 rimfireBasis: the ATF wording
Made
1909–1915Basis: the ATF wording
Service
Commercial

Source

Official wording
ATF P 5300.11, April 2025 edition · Section III · PDF p. 44 ↗ · ATF original ↗
Entries
1 line
Verbatim check
Checked against the PDF text before every release
Editorial facts
Confidence: Medium · Last revised 18 October 2026 (Evidence pass) · How we rate confidence
References
  1. 1. forgottenweapons.com ↗, type
Fact tags
  • ATF the ATF wording states it.
  • REF ¹ an outside reference supports it; the number points to the list of references.
  • ESTIMATE an approximate or indirect reading, for example the production range of the base model.
  • NO CITATION we haven’t attached a reference for this fact; it’s our editorial reading, not ATF’s.
Source checked
20 October 2026: ATF’s page still lists the April 2025 edition
Corrections
None

Historical context

Patent drawing, U.S. Patent 837,867 (shown for Shattuck “Unique” palm gun)
Shown: the patent drawing for O.F. Mossberg's four-barrel palm pistol (U.S. Patent 837,867), on which the Unique was based; not a production example.

Image: U.S. Patent 837,867, “Pistol, sheet 1” by Oscar F. Mossberg, Public domain (US patent). Retrieved October 2026.