A heavy duty single gate kit for long farm and ranch gates, with a UL 325 listing and a lifetime motor warranty. Budget for a battery and, if wanted, the smart kit.
Amazon $549
A heavy duty single gate kit for long or heavy farm and estate gates that wants a UL 325 listing. Check the length and weight chart for gates over 8 ft.
- 850 lbGate weight
- 18 ftGate length
- Battery, solar readyPower
- 1.5 yearsWarranty
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
- Rated for heavy single gates up to 850 lb or 18 ft long
- UL 325 listed, with stop and reverse on contact
- Opens in about 14 seconds
- An 18 month warranty, longer than the lighter Mighty Mule models
- The 850 lb rating is for an 8 ft gate; at 18 ft the limit is 350 lb
- Phone control needs the MMS100 kit, sold separately
- Not for solid surface gates
The Mighty Mule MM57X family
Every Mighty Mule MM57X model we rank, smallest first. Ratings compare each against its own gate type.
| Model | Gate weight | Rating | Price |
|---|---|---|---|
| Mighty Mule MM571W (this one) | 850 lb | 3.6/5 | $443.04 |
| Mighty Mule MM572W | 850 lb | 3.5/5 | $765.99 |
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its gate type. How we rank explains each one.
Specifications
| Model number | MM571W |
|---|---|
| Gate | |
| Gate type | Single swing |
| Heaviest gate | 850 lb |
| Longest gate | 18 ft |
| Time to open | 14 s |
| UL 325 listed | Yes |
| Power | |
| Power | Battery, solar ready |
| Battery | 7 Ah |
| Motor voltage | 12 V |
| Build | |
| Remotes included | 1 |
| Weight | 30 lb |
| Warranty | 1.5 years |
Alternatives in this gate type
The mainstream DIY choice for a medium single driveway gate, with a real UL 325 listing. Buy the battery with it and check the length and weight chart first.
Amazon $344.06A low cost opener for a heavy single gate near an outlet. Pick a UL 325 listed kit instead where the gate faces a public road or children.
Amazon $359Compare
Compare the Mighty Mule MM571W with any other automatic gate opener →
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