Got my BR stock from Buckrail installed on my 250z. Lightened it up at least a pound. Haven't got to shoot it much due to the sub zero temperatures and snow but she's ready!
I've got a cheap Pinty 3 x 9 x 40 side focus on mine which was $39.95 off Amazon for a sweet quick grab groundhog killing setup that I keep ready by my back door!
I got the 1100z gen 2 in 25 caliber last November and it's a great pesting rig! You get 27 shots before needing a refill and it hits hard man and the accuracy is awesome. I can't speak highly of it enough. Pull the trigger brother.
Try the dealer first as they might just swap out for another exact replacement. Then Air Venturi if that doesn't work out. From reading some of the other posts above, you might have it worked out. Keep us posted!