Frank, the probablity the NRA doesn’t know who is donating to them is close to zero — unless that money has been laundered sufficiently or the NRA would prefer not to know. That said, we both can/should wait for that investigation to be completed.
You say the the “firearms” issue is almost always a “left versus right” issue. 2 things:
(1) I’m not talking about firearms generally; I’m talking about assault weapons designed for combat purposes, and in your most recent response, you agreed the high-capacity magazine was designed for military use.
(2) Even if you define left as Democrat and right as Republican, the majority from both parties now favor more gun control. “53 percent of Republicans indicated they supported stricter gun laws, compared to 37 percent [of Republicans] who said the same following the Pulse nightclub shooting in June. 2016.”(https://www.politico.com/amp/story/2018/02/28/gun-control-polling-parkland-430099). So it can now be said, the Republican Senators and Congressman who’ve accepted NRA donations and campaign subsidies are the outliers. It’s time for them to represent the majority if their constituents and not the gun lobby interests who are paying for their votes.
Finally, you say you’re sick of your 2nd Amendment rights being attacked, but let me be clear. I’m neither against the 2nd Amendment nor am I for banning all guns — the issue for most people is stricter control of assault weapons designed for military combat. You may want to argue the 2nd Amendment covers the right to own assault weapons, but it doesn’t. Irrespective, the NRA is also arguing against raising age limits, universal background checks, longer “cooling-off” periods, etc., none of which impinges on anyone’s 2nd Amendment rights.