as seen in this thread:

https://sigforum.com/eve/forums...0601935/m/9690062964

why would a guy use one, do they wear out quicker than the plain old guide rod?

The name of the kit, like the NDZ web site’s features themselves, is a poor one.

It’s not a “reduced power” guide rod, what is reduced power are the recoil springs. Lower power recoil springs are used to “tune” the gun’s actions to different power ammunition. A spring that’s too strong coupled with a wimpy ammunition load can result in low slide speed malfunctions, usually failures to eject, but also sometimes failure to chamber a round or lock the slide open when the magazine is empty.

On the other hand, a spring that’s too weak for a more powerful load can increase felt recoil and muzzle flip, increase battering of the gun’s frame, and possibly cause malfunctions.

https://www.ndzperformance.com...p/ndz-g17-g3-rpr.htm

Whether metal recoil spring guides are necessary or even better than plastic ones is a long-running debate. Most factory rods work satisfy their purpose just fine, but in theory a plastic rod could be damaged or broken and cause malfunctions themselves. A steel rod wouldn’t be susceptible to that’s happening.

I believe what's referred to there is a non-captured guide rod. The idea is that reduced-power springs can be used to tune the pistol to the ammunition, for competition. Typically 147 grain rounds loaded at or close to minimum power factor (125).

That is, as opposed to a factory captured spring. It allows the user to use light, low-recoil loads for competition, and still have adequate cycling and ejection. Typically springs in the 12-15 lb range are used.

Too strong a spring, especially on a long slide, is considered "oversprung," and leads to "slide dip," or dropping the front sight below the aiming point, as the slide returns to battery.

--looks like I posted about the same time as Sigfreund.

so this gun would be a poor chice for a guy that wants to shoot 8 different ammo's through it ?

Would he sell it faster if he offered the o.e.m. parts with the pistol?

quote:

Originally posted by sns3guppy:
I believe what's referred to there is a non-captured guide rod.

No.
The NDZ RSA stuff is captured.
It does introduce a new failure point, the screw that holds it all together.
It needs Loctite.

I've flirted with this stuff on Glocks and have come full circle back to the OEM RSA's.
It's hard to beat the stock RSA's

The guy trying to sell that Glock for $900 is never going to get his money out of it unless he parts it out.

I fell prey to the tungsten Glock guide rod once. Waste of money at least at my level of shooting. It does introduce a screw failure point but I do like buying a spring instead of an entire recoil spring assembly. I hate captured rod systems that make you replace the entire assembly.

Nobody is gonna sell a bubba 900 Glock. If you like to tinker and then sell you have to part it out. And you will still lose money.

A gun like he was selling isn’t an 8 different loads gun. He loads up one match load and the gun is tailored for it. Not necessarily a bed side gun mentality.

quote:

Originally posted by pedropcola:
I fell prey to the tungsten Glock guide rod once. Waste of money at least at my level of shooting. It does introduce a screw failure point but I do like buying a spring instead of an entire recoil spring assembly. I hate captured rod systems that make you replace the entire assembly.

Nobody is gonna sell a bubba 900 Glock. If you like to tinker and then sell you have to part it out. And you will still lose money.

A gun like he was selling isn’t an 8 different loads gun. He loads up one match load and the gun is tailored for it. Not necessarily a bed side gun mentality.

"Fell prey" is a good way to put it.
Buying a "complete RSA" is cheap if you are buying a Glock OEM RSA.
They are dirt cheap.
Glock is winning on that one.

If I want slide velocity tuning cability on a Glock, I'd look to Jager for the components.