Thompson Center T/C Seneca .36 Percussion Sidelock Muzzleloader, 27 in Octagonal Barrel, Walnut Stock, Double Set Triggers
This Thompson Center Seneca is a .36 caliber, small-frame traditional percussion sidelock from the 1970s–1980s, made in the USA. It features a 27-inch octagonal blued steel barrel, color case-hardened lock, walnut stock with brass furniture, and double set triggers. The bore is bright and clean, and the rifle retains the classic Seneca configuration that appeals to traditional muzzleloader enthusiasts.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are minimal markings from previous handling and use, with the most significant marks on the stock. The bore is bright and clean.
What's Included
- Thompson Center T/C Seneca .36 percussion sidelock muzzleloader rifle
The Seneca configuration pairs a 27-inch octagonal blued steel barrel with a traditional percussion sidelock. It uses a snail bolster with nipple and carries period-correct rollmarks, including "THOMPSON / CENTER ARMS - ROCHESTER, NEW HAMPSHIRE - CAL 36" and the "BLACK POWDER ONLY" safety legend.
The lockplate shows a color case-hardened finish with an S-shaped external hammer. The rifle is equipped with double set triggers, offering a refined trigger setup consistent with Thompson Center's traditional sidelock designs of the era.
Sighting is handled by adjustable open sights: an elevator-adjustable rear and a ramped front sight with a red/orange insert for visibility. This sight arrangement supports precise elevation tuning while maintaining a classic profile.
The walnut stock includes a left-side cheekpiece and brass furniture throughout, including a round-lid patchbox, crescent buttplate, nose cap, and oval wedge escutcheons. The forend is keyed with a wedge, and a steel under-rib with two ramrod thimbles runs beneath the barrel, completing the rifle's traditional build.