Mighty Mule MM271
#10 in Single swingFull review
A budget, UL 325 listed kit for a short, light single gate. Anything over 12 ft or 300 lb needs the MM371W or larger.
Amazon $259.99$259.99
The Mighty Mule MM271 is the better automatic gate opener overall, rated 3.0 to 2.9. The Mighty Mule MM271 leads on price. The TOPENS A5131 wins on gate weight and gate length. The Mighty Mule MM271 costs $69.01 less ($259.99 vs $329).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
TOPENS A5131
#12 in Single swingFull review
A low cost single gate kit for a light or medium driveway gate near the house, where a safety listing is not required.
Amazon $329$329
Which should you buy?
- Choose the Mighty Mule MM271 for price ($259.99 vs $329).
- Choose the TOPENS A5131 for gate weight (gates up to 550 lb per leaf vs gates up to 300 lb per leaf) and gate length (gates up to 16 ft per leaf vs gates up to 12 ft per leaf).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every single swing automatic gate opener; a clear win is highlighted. How we rank explains each one.
| Factor weight | Mighty Mule MM271 | TOPENS A5131 |
|---|---|---|
| Overall rating | 3.0/5 | 2.9/5 |
| Gate weight 20% | 0 gates up to 300 lb per leaf | 50 gates up to 550 lb per leaf |
| Gate length 15% | 20 gates up to 12 ft per leaf | 60 gates up to 16 ft per leaf |
| Safety listing 15% | 100 UL 325 listed | 0 no UL 325 listing published, scored as none |
| Price 25% | 97 $259.99 | 79 $329 |
| Warranty 25% | 0 1-year warranty | 0 1-year warranty |
Specifications
| Mighty Mule MM271 | TOPENS A5131 | |
|---|---|---|
| Gate | ||
| Gate type | Single swing | Single swing |
| Heaviest gate | 300 lb | 550 lb |
| Longest gate | 12 ft | 16 ft |
| Time to open | 18 s | 15 s |
| UL 325 listed | Yes | - |
| Power | ||
| Power | Battery, solar ready | Battery, solar ready |
| Motor voltage | 12 V | 24 V |
| Build | ||
| Remotes included | 1 | 2 |
| Weight | 16 lb | 23.4 lb |
| Warranty | 1 year | 1 year |