https://gunfire.com/en/products/specna-arms-sa-b01-carbine-replica-1152200030.html
https://gunfire.com/en/products/sa-b01-one-tm-saec-tm-system-carbine-replica-1152207261.html
The only difference I can see is that one has the Marine markings and the other Specna
Ah yeah, so the older style (marine logo) is the gearbox-out-to-change-the-spring.
But the 2nd one has the buffer tube spring change.
Just to echo what AK2M4 has said, One series Specna arms guns are generally regarded to be the best of the range by some. The Edge, while it has more features and benefits on paper, doesn't seem to match the build, fit and finish of the One series.
The edge range has recently seen a few problems with QC. Not so much with the bearings anymore (that was apparently limited to the first batch) but namely rough burrs and gearbox insides that cause problems elsewhere in the gun.
Though Luke from Negative Airsoft has reported that newer serial number guns are seemingly coming through better now...
Just to be transparent - I have my pick of the Specna arms litter so to speak, and my old beaten up SA-B12 One series is usually the gun I take out the case first. It is a tank.
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