Thompson Center Arms 4100R Venture 3+1 7Mm/300Wm Black Steel

The Thompson Center Arms 4100R Venture 3+1 magazine is a factory-original replacement for your Venture rifle platform. If you own a Venture in 7mm or 300 Winchester Magnum, having a spare or backup magazine on hand is practical insurance—whether you're gearing up for a hunt, heading to the range, or just building out your rifle's accessory ecosystem. Thompson Center engineered these magazines to the same tolerances as the originals, so you get the same reliable feed and fit every time.

Built from polymer material, the magazine is lightweight and durable enough to handle field use without adding unnecessary weight to your kit. The 3-round capacity gives you flexibility for hunting situations where you want to load what you need without carrying excess. The black finish blends with most modern rifle setups and won't stand out on a bench or in a pack.

Thompson Center stands behind their factory specs and materials, and proper care—keeping it clean and storing it unloaded when not in use—will keep this magazine running for years. Whether you're replacing a worn unit, adding a second mag to your Venture, or just being prepared, this is the right choice for maintaining compatibility and reliability.

Key Features

• Factory original Thompson Center replacement magazine
• 3-round capacity
• Polymer construction for durability and weight savings
• Manufactured to original equipment tolerances
• Compatible with Thompson Center Venture rifles

Specifications

Frequently Asked Questions

What rifles is this magazine compatible with?

The 4100R magazine is designed specifically for Thompson Center Venture rifles chambered in 7mm or 300 Winchester Magnum.

What capacity does this magazine hold?

This magazine holds 3 rounds.

Is this an official Thompson Center part?

Yes—this is a factory original Thompson Center magazine manufactured to the same specifications as the original equipment magazines for the Venture platform.

What material is the magazine made from?

The magazine is constructed from polymer, offering durability and light weight for field use.