Nagoya NA-320A (Tri-Band) vs Nagoya NA-771G (GMRS)

The NA-771G is the better antenna for its intended purpose, though the choice ultimately depends on your radio's frequency band.

The critical differentiator is frequency coverage. The NA-320A covers three bands (VHF, 1.25m, and UHF) with mixed electrical lengths, making it a compromise tool. Its VHF performance is noticeably weak at just 0.22 wavelengths, and its claimed 3.5 dBi gain is optimistic. The NA-771G is purpose-built for GMRS at 465 MHz with a solid 0.60 wavelength length that delivers realistic performance around 3.1 dBi, honestly represented in its 3 dBi claim.

Buy the NA-320A if you need occasional tri-band capability and accept mediocre VHF performance. Buy the NA-771G if you primarily operate GMRS and want a single antenna optimized for that band.

The NA-771G's higher score of 91 versus 87 reflects its focused design and honest specifications. If GMRS is your target, the NA-771G wins decisively with better electrical length and no overstatement of capability. For general amateur radio use across multiple bands, the NA-320A offers flexibility at the cost of compromised performance on any single band.