Do the One-Niners throw away their guns after using them a few times? Otherwise there's no real reason why they would have to keep buying more from the Sons, unless their numbers are expanding exponentially.
It's likely they do have a high weapon turnover, as guns used in murders connected to or ordered by organized crime groups are usually disposed of so that multiple killings can't be linked to each other or the group.
The whole "SAMCRO makes its money by buying arms from the IRA" shtick makes no frickin' sense! The Provisional IRA (and its successors post cease-fire) raised or raise money by a variety of means (protection, robbery, smuggling to name a few) but certainly didn't do so by selling arms. In fact, the money was partially raised to fund arms purchases - the IRA and its Loyalist terrorist counterparts are arms importers. Any small arms coming into Northern Ireland would have to be smuggled in (given that no firearms, bar shotguns and bolt action rifles, are any longer produced in either the UK or the Republic of Ireland and private ownership of anything else is essentially verboten in both countries) and then smuggled back out again. From Ireland or the UK to the US, three countries with probably the most efficient law enforcement agencies in the world. Oh, and the Northern Ireland sequences were just embarassing. Belfast Police Department. Seriously?
I don't remember that the guns were coming from Ireland, only that the Irish were providing them to the Sons. Perhaps the Irish siphoned a few off and sold them to the Sons in order to defray the costs of the rest.
As I understood it, the IRA bought guns from Russia, smuggled them into Ireland then turned some over to the Sons, presumably at a large profit to finance the ones they end up keeping for themselves.
I've only finished Season 1 so far, but there was a weird continuity thing. Stahl arrests Luann for the drugs at her porn studio and threatens Otto with sending her up for drugs. So Otto appears to crack to make a deal, and then smashes Stahl's face on his table. But then Luann appears again at Abel's coming home party? How would she get out from under the drug charge, given that Stahl should be royally pissed at her and her boyfriend?
A condition of Otto's testifying was Stahl signing off on Luann's release before Otto gave any information. Once she was free, Otto knew it would look like he'd already talked, so he beat up Stahl.
In the second episode when they're staging a crime scene, why didn't they shoot the bodies first, then put the blood so it looked like it was oozing out of the holes? It would have made it look more realistic.
Presumably they didn't want to stick around their crime scene after rousing up the whole neighbourhood by emptying their clips into the car.