True Precision Recoil Spring Tuning Kit - Fits Compensated & Suppressed 3.7" SIG P365XL & P365 XMacro - Black - 365XLSTK - UPC: 719104537311
Product Description
The True Precision 365XLSTK Recoil Spring Tuning Kit is a high-performance guide rod and spring system custom-engineered for 3.7-inch SIG Sauer P365XL and P365 XMacro handguns running muzzle compensators, suppressors, or lower-impulse target ammunition. Factory captured recoil spring assemblies are tuned strictly for standard uncompensated slides firing 115gr–124gr factory ball ammo. When a compensator or suppressor is added, the increased forward gas vent force or heavy muzzle mass often starves the slide of cycling velocity, resulting in failure-to-eject (stovepipe) or failure-to-feed malfunctions. The 365XLSTK kit solves this by allowing shooters to fine-tune spring resistance to match their exact muzzle device and ammo combination.
At the heart of the kit is a non-captured, heavy-duty stainless steel guide rod paired with a selection of premium, heat-treated flat-wire recoil springs manufactured to exact tolerances. By stepping down recoil spring weight below factory specs (e.g., 12 lb, 14 lb, or 15 lb configurations versus standard ~17–18 lb factory ratings), the slide is allowed to travel its full rearward stroke under reduced cycling energy, ensuring positive shell ejection and smooth lock-time return to battery.
Ideal for competitive shooting, custom build staging, or suppressed tactical setups, the True Precision 365XLSTK kit provides armorers and performance shooters with the adjustability required to eliminate extraction hiccups and achieve reliable, flat-shooting cycling dynamics on customized P365 platforms.
*Armorer Bench Notes & Real-World Staging Guidance:
Platform & Muzzle Device Tuning Matrix:
• Primary Compatibility: SIG Sauer P365XL and P365 XMacro models with 3.7" barrels running aftermarket threaded barrels, compensators, or suppressors.
• Note: Does NOT fit standard micro-compact 3.1" P365 or P365X models.
Tuning & Installation Steps:
1. Unload host firearm, clear chamber, remove magazine, and field strip the slide from the frame.
2. Remove the factory captured recoil spring assembly.
3. Assemble the True Precision stainless guide rod with the desired test spring (start with the middle-weight spring when staging a compensated slide with standard 115gr/124gr range ammo).
4. Compress and seat the guide rod into the slide nose ring and lower barrel lug cutout.
5. Reassemble firearm and perform live-fire testing: If the slide fails to lock back on an empty mag or stovepipes, drop down to the next lighter spring weight. If the muzzle dips excessively or slaps rearward, step up to a heavier spring weight.
Key Features
- Precision-engineered recoil spring tuning system for compensated or suppressed 3.7" SIG P365XL / XMacro pistols.
- Includes a heavy-duty stainless steel guide rod and multiple color-coded/calibrated flat-wire recoil springs.
- Allows fine-tuning of slide cycling velocity to eliminate failures to feed, extract, or lock back.
- Non-captured guide rod design enables fast, tool-less spring weight changes at the bench or range.
- Premium spring steel construction offers exceptional resistance to spring set fatigue under continuous heat cycles.
- Ideal for tuning performance setups running compensators, suppressors, or light competition loads.
- Made in the USA by True Precision.
Product Specifications
- Brand: True Precision
- MPN / Model: 365XLSTK / Recoil Spring Tuning Kit
- UPC: 719104537311
- Guide Rod Material: Hardened Stainless Steel
- Finish: Black / Natural Stainless
- Spring Type: Calibrated Flat-Wire Recoil Springs
- Platform Fitment: SIG Sauer P365XL / P365 XMacro (3.7" Barrel Models)
- Mass: Approx. 0.12 lbs (1.92 oz)
