Investarm Great Plains Rifle .50 Percussion Muzzleloader, 32 in Octagon Barrel, Walnut Half-Stock, Double Set Triggers
Made in Italy by Investarm S.p.A. for Lyman, this .50 caliber Great Plains Rifle is a classic percussion sidelock muzzleloader with 1980s Italian proof marks, including date code AP. It features a 32-inch octagonal barrel with a 1:60 round-ball twist, double set triggers, and traditional plains-rifle architecture in walnut. Clear importer and proof markings confirm its origin and black-powder designation.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: There are markings from previous handling and use. Areas of rust are present. The bore is bright and clean. Refer to the photos for additional detail.
What’s Included
- Investarm Great Plains Rifle .50 percussion muzzleloader
This rifle follows the proven plains-rifle pattern with a percussion sidelock, external hammer, and single-shot configuration. The double set triggers provide a crisp, tunable pull that suits deliberate target work and traditional field use.
The 32-inch octagonal barrel carries a slow 1:60 twist intended for patched round ball. As noted on the hang-tag, it is not intended for conicals or sabots, aligning it with classic loadings for accuracy and consistency.
Sighting is straightforward and practical with an adjustable open rear sight using a step elevator and a dovetailed front blade. These iron sights pair well with the rifle's long sight radius to aid precise holds.
The walnut half-stock includes a cheekpiece, two wedge keys with oval escutcheons, and a crescent steel buttplate. Length of pull is 14.0 inches, offering a traditional fit. Markings include Italian proof stamps (PN) and date code AP, "Made in Italy - Black Powder Only," the Lyman Middlefield, Conn. importer mark, and Investarm address.