posts here as maxfan!!Bob Boilini at Firearms Depot in Flagstaff, AZ offers a spare parts kit direct from Germany that includes an extractor, recoils springs, trigger return spring, locking block spring and grip screws.
You can also get an X5 extractor from Gray Guns, but it is a service they offer and you must send in the gun for fitting. I think the turnaround time is a month or more.
Northlight
There is no seperate parts kit for the .40. The recoil spring is different (a green colored spring) but the other springs and parts are the same as 9mm. 9mm kits are available online from Germany and on Gunbroker. I got this info from Bob Bollini and from Al Larochelle at Sig who is the Sr Gunsmith and seemingly knows the answer to every tiny detail I have ever pondered.I wander if there is a spare parts kit for the sao 40cal?
I have a 9mm one. Not sure why lol as Ive only put one box of shells thru her.
I wandered if the recoil springs might have been the only difference. Thank you.There is no seperate parts kit for the .40. The recoil spring is different (a green colored spring) but the other springs and parts are the same as 9mm. 9mm kits are available online from Germany and on Gunbroker. I got this info from Bob Bollini and from Al Larochelle at Sig who is the Sr Gunsmith and seemingly knows the answer to every tiny detail I have ever pondered.