ABBREE GMRS 42.5-inch Tactical (SMA-Female) vs Nagoya NA-701G (GMRS)

The Nagoya NA-701G is the clear winner for GMRS use, despite its higher price.

The single most important differentiator is electrical length. The ABBREE's 1.68 wavelengths creates a poorly matched multi-wavelength design that contradicts its claimed 5 dBi gain, which is overstated by roughly 6 decibels. The Nagoya's quarter-wave design at 0.22 wavelengths is far more appropriate for handheld work, though its claimed 2.15 dBi gain is also overstated by approximately 2.6 decibels. Both manufacturers inflate their specs, but the Nagoya's claims are less egregious and its design is fundamentally sounder.

The ABBREE appeals to budget-conscious users who value portability and can accept that performance will underdeliver relative to marketing claims. The Nagoya NA-701G is the better choice for anyone who wants an antenna actually engineered for the GMRS band on a handheld radio.

Go with the Nagoya NA-701G. You'll pay seven dollars more, but you get proper quarter-wave engineering in a package designed for the band. The ABBREE's longer length provides no real benefit on GMRS and creates design compromises that the Nagoya simply avoids. For critical communication, the Nagoya's superior electrical design justifies its cost.