MTM Case-Gard J-20 Slip Top Multi-Caliber Rifle Ammo Box - Clear Red, 20-Round Capacity
- Capacity-Rounds:
- 20
- Type:
- Ammo Box
- Finish-Color:
- Red
- Model:
- Slip-Top Ammo Box
- Size:
- 17/221/223
- Material:
- Polypropylene
- Dimensions:
- 2.35" OAL
- Hardware:
- None
The MTM Case-Gard J-20 slip top multi-caliber rifle ammo box is a straightforward, tough storage solution for shooters who need reliable ammunition organization. Built from durable polypropylene, this 20-round capacity box handles the hard work of range days, hunting trips, and reloading sessions without the kind of wear that wrecks cheaper plastic cases. Whether you're stocking factory rounds or your own handloads, the slip-top design makes it easy to access what you need without fumbling with latches.
Shooters and reloaders reach for MTM cases because they actually last. The material resists warping, cracking, chipping, and the expansion issues that plague flimsy ammunition storage. The polypropylene construction won't degrade in the truck bed, the range bag, or years on a shelf, which matters when you're depending on gear to stay put and perform. The clear red finish lets you spot your ammo at a glance while the rounds nest bullet-up for safe, organized stacking.
If you reload, you already know that case dimensions matter—some loaders prefer a lid that doesn't contact bullet tips, and MTM designed the J-20 with that in mind. The slip-top approach gives reloaders working with expanded brass the confidence that their components stay protected without unnecessary contact. It's a practical choice for anyone serious enough about shooting to move beyond cardboard boxes and plastic blister packs.
Key Features
- 20-round capacity for rifle ammunition
- Durable polypropylene resists warping, cracking, chipping, and peeling
- Slip-top design for quick access
- Rounds nest bullet-up for organized storage and safety
- Clear red finish for easy visibility
- Multi-caliber compatible
Specifications
| Capacity | 20 rounds |
| Material | Polypropylene |
| Design | Slip top |
| Compatibility | Multi-caliber rifle ammunition |
| Color | Clear red |
Frequently Asked Questions
What calibers does the J-20 hold?
The MTM J-20 is a multi-caliber box designed to work with rifle ammunition across a range of standard calibers.
Is this case good for reloaders?
Yes. The slip-top design and interior dimensions accommodate reloaded rounds, including brass that has been expanded, without the lid pressing directly on bullet tips—a feature many precision reloaders prefer.
Will this case warp or crack with long-term storage?
No. The polypropylene construction is engineered to resist warping, cracking, chipping, and peeling, making it reliable for years of use and storage.
What's included?
You receive one 20-round capacity slip-top ammunition box in clear red.
Ammunition Restrictions:
You must be 18 years or older to purchase shotgun or rifle ammunition, and 21 years or older for handgun ammunition. All ammunition must be shipped via Domestic Ground, and shipping is not available for international residents. Residents of CA, DC, IL, MA, NY, CT, and NJ may be subject to additional restrictions. Always ensure you use the appropriate ammunition for your firearms, and check your state and local laws for any other relevant regulations on firearms and ammunition. Due to Department of Transportation regulations, returns on ammo cannot be accepted. Please verify local laws before placing an order.
We are unable to ship ammunition to the following:
- Hawaii
- Alaska
- P.O. Boxes
- APO/FPO Addresses
- International Addresses
- U.S. Territories
- U.S. addresses with zip codes starting with (100, 101, 102)
Illinois residents must provide a copy of a valid FOID Card or Valid Concealed Carry License, along with their IL driver’s license or IL state identification card to purchase ammunition. The ammunition can only be shipped to an address listed on either of those two documents.
Email: [email protected]

