SIG P-Series Custom Strut System
$75.00
The Grayguns custom-designed Strut System fully supports the main spring, reducing friction, spring bowing, and fatigue. The design eliminates the double-action “crunch” felt in OEM pistols. This complete system also includes our custom P-Series Master Spring Set to help reduce your pull weight for full tuning options.
Designed for many SIG Sauer® P-Series Traditional DA/SA pistols. Review our Fit Guide below.
Description
Bruce Gray designed our custom P-Series Fat Custom Strut System to help bring another Grayguns custom gunsmithing service to the drop-in parts market.
For more than 40 years, Bruce has been modifying factory struts to eliminate the typical double-action crunch caused by the sharp edges and tip of the strut.
In his new design, the fat strut fully supports the main spring, which reduces friction, spring bowing, and fatigue. The struts are cut using a precision EDM process, hand-finished, and heat-treated to the proper hardness.
A durable seat that is machined in-house is paired with the upgraded strut. It is made of aircraft-grade aluminum and anodized. These struts are indestructible and guaranteed for life.
This complete system also includes our custom P-Series Master Spring Set to help reduce your pull weight for full tuning options. The kit contains a 17-pound spring (red) and a 19-pound spring (blue).
P-Series Custom Strut System Fit Guide
The system is compatible with the E2 style grips and most older style grips. The design fits most of the following SIG DA/SA pistol variants:
- P226
- P228
- P229
- P225-A
- P227
Additional information
| Weight | .125 lbs |
|---|---|
| Package Dimensions | 6 × 4 × 1 in |
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Disclaimer
Many parts sold by Grayguns - including but not limited to triggers, trigger kits, internal components and spring kits - are intended for installation by a qualified armorer or gunsmith who is familiar with the firearm.
Although kits fit with no issues in a great majority of pistols, Grayguns cannot guarantee perfect functionality in every instance.
Due to varying tolerances present in all mass-produced firearms, professional fitting by a qualified armorer who is familiar with the pistol's action may be required.
Grayguns offers installation services for all parts kits we offer. If you have any issues or questions about the installation process, STOP IMMEDIATELY and contact the Grayguns Customer Service Team.
tgtkemp (verified owner) –
I put this Grayguns SIG P-Series Fat Custom Strut System in my P229 Equinox and the trigger is NOW amazing. I have other Sig pistols, that I thought had great feeling triggers, this one takes the crown. Thanks for making available such an easy upgrade !!!
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reganedalgo (verified owner) –
So stoked when I was able to purchase and install this in my MK25. Trigger feels 1000x better, extremely smooth pulls and drastically reduced DA/SA pulls. Easy install process, quick shipping and amazing customer service is always a plus!
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pr.thomas (verified owner) –
I just installed the kit on my M11A1, and it really makes a difference in the DA Trigger pull. It’s a lighter pull and much, much smoother.
It went from the Factory 12lb. to 9lb. (It actually feels lighter than that, but it’s what my gauge breaks at.) I wasn’t sure about the included sear spring, so I contacted customer service by email and Chris promptly replied and informed me that it is a lighter spring than the factory spring. I installed the sear spring along with the 17lb hammer spring.
I’m not a gunsmith by any means but after watching a couple of videos I found online, it is a very easy process. I think my next purchase will be the ELS Trigger system with a flat, adjustable trigger.
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quennel.lawson (verified owner) –
Works as a performance upgrade should. Love the reduced lbs compared to what it was especially in sa.
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Jaysen Smith (verified owner) –
Super smooth part , form , perfect fit and reduced my trigger pull nicely.
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bakerdavel (verified owner) –
Double-action practice once bordered on futility. The force needed to pull the trigger varied through the stroke; I was never sure when a slight “catch” meant the hammer was about to release or further pull was needed. I found myself flinching because of this uncertainty, making the first shot a poor one. This strut, combined with installation of the included 17-pound spring, cured this ill. My trigger pull smoothed like rubbing two sheets of silk together rather than ripping Velcro. I now can tell when my Legion is about to go boom. That double action shot accuracy is now nearly as good as the single action one. The entire pull stroke is smooth and consistent throughout. (I did grease it with TW25B; the strut has a nonstick coating.) You’ll need to go online and watch YouTube videos to figure out how to install it. Installation instructions are not included. Pretty easy once you figure it out. I’m still not sure about the role of the included sear spring – does it increase performance or is it just a spare and the same as factory? I wound up not installing it. No issues with light strikes with factory loads after the 17-pound spring was installed. Swapped out struts in a 9mm Legion and a .40-caliber P226. Both performed wonderfully.
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Derek Enslen (verified owner) –
Paired with the GG SRT kit and ELS trigger system the fat strut gives my Sig P226 Elite smooth as butter and fantastic! I’d recommend it for any Sig P226 or similar!!!
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jefferybriles (verified owner) –
I purchased this for a P229 Elite that I own and am giving a facelift to. The strut is part of a series of additions, including a short reset trigger, optic, and ergo grip. The Fat Custom Strut System really improves that double action pull, helping to make that first shot stay in the 10 ring. I intend to set this pistol up as an appendix everyday carry once I put a thousand rounds through it and find a holster to fit the optic. If you intend to improve on an already great pistol, this Grayguns kit would be money well spent!
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dmchapman30 (verified owner) –
I installed this Grayguns P-Series hammer strut kit with the 19 lbs. spring in a late 90s German frame P229 (.40 cal.) and 2008 German frame P226R( .40 cal. converted to .357 Sig). For both pistols, each demonstrated reduced trigger pull for both single and double action. P226R Dbl. 10+ to 9 lbs/ Sing. 4 to 3.75 lbs.; P229 result Dbl. 9 lbs/ Sing. 4.5 lbs.) The promise of improvement is proven with each stroke of the trigger! This will compliment the Grayguns trigger & trigger bar I plan to order in the near future for both. Thank you for making great parts for these tried and true fighters!
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andre.serbin (verified owner) –
swapped my strut on p229 legion and its amazing how well trigger pull feels! Smooth almost like it has roller bearings
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Chris Roush (verified owner) –
Does exactly what it says that it will do. I like it and it will help my DA shot placement for sure.
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win9639445 (verified owner) –
I installed this kit on my 225A with the blue mainspring. Smoothed out the DA pull so much. Also it installed rather easily. A definite must have for compatible P series guns.
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George Carpenter (verified owner) –
P226R 40S&W, accurate with the usual crunch/stacky SIG DA trigger.
Previous SIGs were reworked with Wolff springs and some Armorer Love™, to some success.
Nothing compared to the Grayguns Fat Custom Strut with the Master Spring Set.
The 19-pound Blue spring was originally installed with 100% duty reliability in mind.
Marked improvement when compared to the factory original. Range test @ 36ºF in rain. 100% reliable.
The Red 17-pound spring was installed.
The firearm was then packed in snow to chill the firearm, magazines, lubricants, and cartridges.
I was skeptical. Outcome?
100% reliable with a mix of Federal HST3, Speer Gold Dot 165, and Winchester 180 gr Ball – despite the “weaker” spring, and below freezing operating conditions.
The Grayguns ELS with Hybrid Trigger was added, nearly negating the DA pull difference in combat scenarios.
Amazing.
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Kevin (verified owner) –
It’s thr usual Grayguns quality. Excellent finish work and a great design. All the little details have been cared for and the result is a clean DA stroke that’s free of the gritty, crunchy feeling. Once you try it, you’ll want one in every pistol.
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grammcgregor (verified owner) –
I put this in my late 90’s German Framed P229 when I was converting it from .40 S&W to 9mm – also put in the Gray Guns ELS Trigger – which I ordered from Sig – even though Gray Guns squared away my confusion and sent me the needed part FREE!
My P229 went from a tired clunky trigger to a sweet shooting pistol moving out of the safe and not only onto my hip but out to the range!
The strut makes the double action feel like it’s on roller bearings – absolutely sweet!
Way to go Gray Guns and Keith Hosey for helping me so much at all hours!!
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