Hi guys!
I am new to the forum and I have been searching for som answers on this topic but could not really find any.
I own a USP expert 9mm and it has fired about 6-7k rounds of standard 124gr rounds. So now I was thinking it might be time to replace the recoil-spring and the O-ring (the O-ring has been replaced 2 times before). By the way I had the green O-ring before. The ones i found now are black, is there any difference?
How often do you think these and other ware and tare parts need changing?
Also would you for any reason recommended a different setup beside the factory standard. I am thinking of buying the following parts from HK-parts;
USP 9mm, 40 Recoil Spring (HKUSPRECOILSPRING) https://www.hkparts.net/shop/pc/viewPrd.asp?idproduct=2067
HK 9mm Barrel O-Ring For Thread Protector - Black (9MMORING) https://www.hkparts.net/shop/pc/viewPrd.asp?idproduct=908
Snap Ring For USP Full Size & Mark 23 Recoil Assemblies (HKPMK23025) https://www.hkparts.net/shop/pc/viewPrd.asp?idproduct=1258
Hammer Spring For USP, P30, P30L, P2000 - Light (214300LT) https://www.hkparts.net/shop/pc/viewPrd.asp?idproduct=16489
I would be very grateful for your opinions on the matter:
All the best
I am new to the forum and I have been searching for som answers on this topic but could not really find any.
I own a USP expert 9mm and it has fired about 6-7k rounds of standard 124gr rounds. So now I was thinking it might be time to replace the recoil-spring and the O-ring (the O-ring has been replaced 2 times before). By the way I had the green O-ring before. The ones i found now are black, is there any difference?
How often do you think these and other ware and tare parts need changing?
Also would you for any reason recommended a different setup beside the factory standard. I am thinking of buying the following parts from HK-parts;
USP 9mm, 40 Recoil Spring (HKUSPRECOILSPRING) https://www.hkparts.net/shop/pc/viewPrd.asp?idproduct=2067
HK 9mm Barrel O-Ring For Thread Protector - Black (9MMORING) https://www.hkparts.net/shop/pc/viewPrd.asp?idproduct=908
Snap Ring For USP Full Size & Mark 23 Recoil Assemblies (HKPMK23025) https://www.hkparts.net/shop/pc/viewPrd.asp?idproduct=1258
Hammer Spring For USP, P30, P30L, P2000 - Light (214300LT) https://www.hkparts.net/shop/pc/viewPrd.asp?idproduct=16489
I would be very grateful for your opinions on the matter:
All the best