Mighty Mule MM372W
#3 in Dual swingFull review
The mainstream UL 325 listed choice for a pair of medium driveway gates. Add a battery and check the length and weight chart.
Amazon $599.99$599.99
The Mighty Mule MM372W rates 3.2 among dual swing automatic gate openers; the US Automatic Sentry 300 rates 3.2 among single swing ones. The Mighty Mule MM372W costs $795.01 less ($599.99 vs $1,395).
US Automatic Sentry 300
#5 in Single swingFull review
A commercial grade, UL 325 listed single gate opener with a long warranty for buyers who value proven parts support over capacity per dollar.
Amazon $1,395$1,395
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different gate type classes (dual swing and single swing), and each is scored against the reference points for its own class, so a rating says how well each does among its own gate type peers. How we rank explains each factor.
| Factor weight | Mighty Mule MM372W | US Automatic Sentry 300 |
|---|---|---|
| Overall rating | 3.2/5 | 3.2/5 |
| Gate weight 20% | 50 gates up to 550 lb per leaf | 24 gates up to 400 lb per leaf |
| Gate length 15% | 60 gates up to 16 ft per leaf | 100 gates up to 20 ft per leaf |
| Safety listing 15% | 100 UL 325 listed | 100 UL 325 listed |
| Price 25% | 59 $599.99 | 0 $1,395 |
| Warranty 25% | 0 1-year warranty | 50 3-year warranty |
Specifications
| Mighty Mule MM372W | US Automatic Sentry 300 | |
|---|---|---|
| Gate | ||
| Gate type | Dual swing | Single swing |
| Heaviest gate | 550 lb | 400 lb |
| Longest gate | 16 ft | 20 ft |
| Time to open | 14 s | 16 s |
| UL 325 listed | Yes | Yes |
| Power | ||
| Power | Battery, solar ready | Battery, solar ready |
| Motor voltage | 12 V | 12 V |
| Build | ||
| Remotes included | 1 | 2 |
| Weight | 41 lb | - |
| Warranty | 1 year | 3 years |