ABBREE GMRS 42.5-inch Tactical (SMA-Female) vs Nagoya NA-771 (SMA-Female)

The Nagoya NA-771 is the clear winner here, scoring 20 points higher and offering genuinely useful performance across VHF and UHF.

The fundamental difference is electrical length. The ABBREE's 1.68 wavelengths at GMRS creates a multi-wavelength radiator that delivers only negative gain despite its 5 dBi claim, which is overstated by approximately 6 dB. The Nagoya performs as advertised because its design actually matches its specifications: at UHF it operates at 5/8 wavelength where it achieves realistic 2.9 dBi gain, while its VHF performance is admittedly compromised at 0.19 wavelengths.

The ABBREE works as a budget backup antenna for GMRS-specific use where its low price matters more than performance. The Nagoya is the better choice for anyone serious about dual-band VHF/UHF work who values a compact platform that doesn't overstate its capabilities.

Buy the ABBREE only if cost is paramount and you need a dedicated GMRS whip. Buy the Nagoya if you want an antenna that actually performs as claimed and works reasonably well across both bands.

The Nagoya NA-771 is the straightforward recommendation. It's more expensive but honest about what you get, and that integrity translates to real utility.