earlan357

I enlarged the hole in the front of the slide for the fatter Legion rod. Added a Lok TSO magwell and cleaned up the hammer hooks. Tuned the sear spring for a 2.5# break. Modified a flat bottom FP stop to fit. Seems happiest with a 10# Wolff recoil spring and 19# mainspring. Also, my carbide throating reamer arrived after 8 weeks. Rounds plunk without issue now. I sent it to Vulcan Machine Werks for RMR milling and Cerakote. I normally black nitride, but I figured the slide is DLC over stainless and the cut is mostly sealed off by the optic. Got a Lok TSO magwell and made a tungsten guide rod while I was waiting. Mag well leaves a slight gap at the rear when lined up with the mag opening. My 507Comps arrived this week too.

Just picked up two. Here's the reticle options on a uspsa target scaled for 7 yards.

It quantifies everything you feel in the trigger pull and reset. It shows the trigger weight measured every .025mm or roughly .001" of the the pull. So you could select the gen5 dot trigger that comes stock in a G17 and compare it to another configuration. Here's a cheat sheet on how to make sense of the lines.

Sorry about that. Fixed.

Tested with all oem connectors

I wasn't impressed with the QC. Mine fluctuated between .312" at the base and tip but expanded to .317" in the middle. Tells me they didn't have the feed speeds setup properly to prevent it from bowing while it was being turned. The finish was smooth but uneven, Like it was done by hand with a buffing wheel. I used mine with 1911 springs so I can't tell you the OD of the spring they use. The OD of the base was .503" if that helps.

The spring isn't that hard to get to. You push out the ejector from the rear, then the "sear pin", then push-n-twist to get the spring guide out. A regular gen5 spring won't work. This peformance spring has additional dead coils and is flat ground to prevent it kinking on the shaft. I did some calculations and settled on a few custom spring specs I sent to our spring manufacturer at work. Testing now. Glock Performance Trigger Graph

So I uploaded my trigger test rig data to a public interactive graph. Tested a stock Gen5 trigger and Glock Performance with OEM connectors. They're stock other than about 1000 dry fires to break them in. I also tested a "P1" custom spring I'm working on. Everything can be filtered for easy comparison. Below is a cheat sheet on how to interpret the graphs. I ended up reprogramming the rig so now it takes into account the additional overtravel created when the trigger is pinned back and the slide is cycled. This shows the true reset distance. I had to set the "finger" of the rig a little lower than where your finger naturally rests due to clearance issues, so the weights are about 15% lighter than what you'd expect, but they're consistent and repeatable enough to make valid comparisons. Link to graph: Glock Performance Trigger Graph Graph cheat sheet:

I had a gen5 slide blank milled for a similar setup. I modified it to accept a longslide 1911 recoil spring. All that preload let’s me run an 11# equivalent spring and still have plenty of oomph to close the slide against a 5# striker spring. So even though peak spring force is reduced, it’s near factory in battery. Also made a fat tungsten guide rod to match.

Played with my DWX over the weekend while shooting 25y B8 drills. Threw in a 19# mainspring and replaced the sear spring. The factory sear spring’s sear leg was slightly short and a pita to position correctly. Tried a WC 13# flatwire recoil spring but really preferred an ISMI Glock 17 11# spring. Despite the lower rating, the Glock spring was returning the front sight level while the WC was returning slightly high with 130PF 147gr. Probably due to longer free length and increased preload. Picked up a 1911 flat bottom FP stop to play with in the shop. The firing pin hole is drilled lower in the DWX but I can throw it in the mill at work to make it match. I took some measurements and the slide will fit a standard 1911 round wire recoil spring. I’m going to open up the recoil spring hole and modify an X5 Legion guide rod to fit. Opens up spring tuning to the full suite of 1911 springs and adds a little more weight under the muzzle. The factory mag release felt a bit stiff even after a bit of buffing. Picked up a Wolff reduced power 1911 spring pack. The #3 felt just right. Also, LOK palm swell Veloce grips for the Shadow2 feel just as good on the DWX as my SP-01. Once I get the guide rod and fp stop situated, it’s off for optic milling.

I adapted my G34 Gen5 to take a longslide 1911 spring with a custom reverse plug. By extending the recoil spring tunnel all the way to the muzzle, I can use a longer length spring with a much lower spring rate. At full recoil the spring is 11#, but 8# with the slide closed. So I get a lightweight recoil spring that still has enough force to reliably close the slide against a full power striker spring. I turned a max diameter tungsten guide rod that came out to 3.8oz.

When my new shoe comes in I'll run it with (-), (.), unmarked, and a (+).

My Glock Performance trigger arrived today so I dusted off my trigger dyno. The Factory and Timney triggers have less than 500 rounds through them, while the Glock Performance is new out of the box. All were cleaned and wiped down with Slip2k. All used the same slide and a 4.5# "dot" connector. Keep in mind that most people measure trigger weight at the tip near the trigger guard. While this makes it easier to get consistent readings, it's lower than where your finger actually rests and gives a lighter reading than actual. The "finger" on my rig pulls where I do, about 2/3 down the face of the trigger. The Performance trigger starts about 4mm farther forward in the trigger guard than the factory. Both have a total travel of about 10.5mm. The Timney starts about 1mm farther back than the factory, and the overall travel is reduced to about 8mm. The Performance trigger reduced overtravel to about 0.6mm, while the Factory and Timney remained close to 1.2mm. The Performance trigger’s safety blade spring is quite strong so it tends to catch on the frame if your finger isn't perfectly square to the face. While the wall is clearly defined, the break is pretty mushy. Hopefully it’ll smooth out with use. I'm going to revisit this with a Timney shoe to get a more equal comparison. I also have some custom springs on order. I should be able to reduce the break weight by 8-12 oz but maintain the same reset force. Hopefully I can combine that with a heavier connector to get a crisper break and shorter reset while keeping the break under 3#. Testing.mp4

A G17 length guide rod is long enough. The P10F shares nearly the same amount of travel and free space for the spring as the P10C, so G17 springs will bind and reduce rear travel. A Wolff or Springco roundwire spring for a G19 works with the .275" diameter rod and won't coil bind.

The CGW SS rod weighs 0.7oz. The Jentra .275" Heavy weighs 2.0oz after it's cut to length.