GrovTec US Inc GTSW308 Mag Cap Shotgun 1″ Push Button Black Oxide Mossberg 500 12 Gauge Steel

Shotgun maintenance goes beyond cleaning and lubrication—your magazine tube needs protection too. This push-button mag cap from GrovTec fits Mossberg 500 platforms and delivers straightforward functionality for 12-gauge shooters. Whether you're in San Ramon or elsewhere across California, understanding your gear matters. Review California firearm laws to stay current on regulations affecting your equipment.

Steel construction and black oxide finish

The GTSW308 uses steel construction with black oxide coating to resist corrosion and wear. Black oxide provides a durable, non-reflective surface that handles field conditions without unnecessary maintenance. This mag cap threads onto standard 1-inch tubes found on Mossberg 500 shotguns. TacticCAL Gun Store stocks genuine GrovTec components for shooters who need factory-grade replacement parts and accessories. The push-button design allows quick removal when you need access to your magazine tube. Visit our gun shop in Sunnyvale for our full catalog.

Frequently asked questions

Does this mag cap work with all Mossberg 500 variants?

The GTSW308 is engineered for Mossberg 500 platform shotguns with standard 1-inch magazine tubes. Check your shotgun's tube diameter before ordering to ensure proper fit and function.

What does black oxide coating do for steel gun parts?

Black oxide provides corrosion resistance and a matte finish that reduces glare. It creates a protective layer on steel surfaces, extending component life in humid or wet environments without adding significant bulk.

Can I transfer ammo through an FFL in Sunnyvale?

Yes — TacticCAL processes ammunition shipments from online sellers under California's ammunition eligibility check requirements. Find FFL dealer San Jose at TacticCAL.