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Hey all... Just got my first USP .40 full size. It's used... great condition... year KE (94). Had a quick question though... it currently has a free floating recoil spring. I read about how HK started using the captured spring system later in 94.... I can install the captured spring system and do a sort of one for one swap and should be good to go right? I know it's fine to keep what I already got, but I'm just curios about the whole thing. Thanks in advance fellas.
 
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