I think I almost care enough to check on the reality or fallacy of that. I always assumed the buffer was there to absorb the last bits of slide travel and to "buffer" the impact if it got that far. If you're correct that the compressed spring length is longer than the length of the buffer and it subsequently does nothing, then a weak or out of spec spring will allow a shock load to to be transmitted through the recoil assembly. I'll leave it to everyone else to finish the thought.
Rules to live by: 1. Eat meat... 2. Shoot guns... 3. Fire... 4. Gasoline... 5. Make juniors
Note: I eddied this as my initial post contained some eronated opinions of mine.
While outside the weapon, the buffer travel all the way to the end of RSA.
While in weapon, it stops about 2-3mm before reaching the end of that travel as it hist a protrusion of the frame. Add to this the thickness of the retaining washer and I believe the length of buffer will clear by a small margin the length of the compressed spring
Not like in this picture:
Like in this picture:
The protrusion is inside the frame like a collar on the underside:
Last edited by serghey24; 05-21-2019 at 06:53 AM.
HK Engineers designed and implemented the nylon bushing for a purpose, to absorb load on the fire cycle, it's doing it's intended job even if you think it's not. =)
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I ASSumed the P30L was likely the same as the P2K and P30 despite using a different bumper. The P30L bumper does work as I just confirmed. The P2K and P30 system does not work. The compressed spring is a good 1/4" longer than nylon buffer at full compression.
I could be missing something here, but after taking lots of measurements, I removed the barrel from a USP Compact 40 and the buffer is clearly pressed between the shoulder of the frame and the part of the slide that compresses the recoil spring, with the slide fully to the rear, looking into the ejection port.