Two-round ammo holder for 7mm-08 and .284 Winchester
The KMRNL Sidewinder 7mm Two-Round Ammo Holder carries two spare cartridges in a rigid, glass-filled polymer body. Its zero-degree profile keeps the rounds flush to the mounting angle. Choose Curved, Flat, or M-LOK mounting for your stock or chassis, and use the compatibility table below to check your exact cartridge.
Choose your mounting style
| Mount | Best For | Notes |
|---|---|---|
| Curved | Composite & wood stocks with rounded contours | Low-profile fit along buttstock, riser, or forend |
| Flat | Flat surfaces (cheek risers, rails, flat forends) | Maximum contact area for adhesive or screws |
| M-LOK | Chassis/handguards with M-LOK slots | Direct M-LOK interface, includes hardware |
Features and construction
| Feature | Description |
|---|---|
| Zero-Degree Angle | True flush presentation for a clean grab |
| Three Mount Styles | Curved, Flat, and M-LOK to fit your stock or chassis |
| Durable Polymer | Rigid, glass-filled proprietary blend for field abuse |
| Adhesive +/or Screws | Use 3M™ VHB™ (Curved/Flat) or included screw retention for M-Lok style |
| Made in USA | Designed and manufactured by KMRNL |
Cartridge compatibility: check the exact 7mm cartridge
| Confirmed Fit | Also Compatible | Check Fit |
|---|---|---|
| 7mm-08 Remington ✅ | 7×57 Mauser (7mm Mauser) ✅ | 7mm BR Remington ⚠️ (tight tolerances) |
| .284 Winchester ✅ | 7mm-08 Ackley/Improved ✅ | Wildcats based on .308 case ⚠️ (verify) |
| 7mm IHMSA / 7mm-08 variants ✅ | 7×57 AI / modern brass ✅ | 7mm Rem Mag / WSM / SAUM ❌ (use Sidewinder Magnum) |
⚠️ Designed for the .473″ head-diameter family. Magnum 7mm rounds (~.532″) are not supported—see the Sidewinder Magnum.
What is included
| Item | Qty |
|---|---|
| Sidewinder 7mm Two-Round Holder — your selected mount | 1 |
| 3M™ VHB™ adhesive pad (Curved/Flat) | 1 |
| Retention screw (Curved/Flat) or M-LOK hardware set | 1 |
| Installation instructions | 1 |
Installation notes
- Clean surface with isopropyl alcohol before mounting.
- Allow 24–72 hours for adhesive to fully cure before hard use.
- Fine-tune the retention screw after the adhesive has bonded.
Compare other two-round holders
For a different cartridge or mounting style, browse KMRNL two-round ammo holders. For fitment help, send us your cartridge, rifle model, and preferred mounting location.
| Weight | 0.02 lbs |
|---|---|
| Dimensions | 3.5 × 1.5 × 1.2 in |
| Mount | Curved, Flat, M-LOK |
| Color | Black, Gray, Black Gray Top, Gray Black Top |
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