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EJ
Manufacturer profile
Eun Jin
Eun Jin is a Korean brand best known for heavy hunting pellets in larger calibers, with a smaller and now-residual line of PCP rifles overlapping the Sam Yang Sumatra platform.
In our words
Eun Jin's lasting impact is in ammunition. The heavy domed and pointed pellets in .22, .25, and 9mm became the standard round for Korean PCPs and big-bore American rifles, and they're still in retail circulation. The rifles are a different story: small production, easily confused with Sam Yang Sumatras, and now largely a used-market curiosity. For listings, the key question is which physical rifle is actually present.
Support
- First contact
- Specialty parts/service house or the legacy U.S. importer.
- Summary
- Defunct/dormant rifle support; legacy U.S. importer or third-party tuner only. Pellet products are still in retail circulation through major airgun retailers.
- Warranty
- Brand largely defunct; assume no transferable warranty.
- US availability
- Pellets remain available through Pyramyd AIR, Airgun Depot, and Amazon. Rifle availability is residual and used-market only; no active U.S. distributor for Eun Jin-branded rifles.
- Owner prep
- Exact model and caliber; Generation; Serial number if present; Pressure-hold proof; Magazine count and condition; Documentation that the rifle is genuinely Eun Jin-branded (not a misattributed Sam Yang Sumatra); Photos/video of any leak or function issue; Chrono data with documented pellet
Also known as
EunjinEun JinEun-JinSumatra 2500Eun Jin pelletsEun Jin Old Boss
Real-world commentary
Eun Jin's enduring relevance is on the pellet side, with heavy domes and pointeds in big calibers that the Korean PCP scene built around. Rifle attribution gets murky because Sumatras and Eun Jin-branded guns share a platform. Buyers of any rifle marketed as Eun Jin should verify the actual manufacturer.