One thats not beat to hell, cracked, mutilated, etc...
The buffer tube for the A1 and A2 are the same, right???
It's identical to CavArms C1 (A1 Length) stock.
I have both, and it's a quality buttstock despite the cheap price. Matter of fact, your question reminded me to order a couple more because i want to replace 2 other A2's I have.
The tube is the same for both stocks, but the buttplate screw isn't....it's shorter on the A1.