Alpha Pack – Glock 19/23/32 Compact Recoil Springs – 13 LB/15 LB (2 Pack)
PLEASE DOUBLE CHECK DETAILS AND FITMENT BEFORE PURCHASE.
This ISMI recoil spring tuning pack gives you both the 13 lb and 15 lb compact flat wire recoil springs in one bundle for Glock compact-size builds. It is built for shooters who want to test, tune, or keep multiple spring weights on hand without buying one now and then crawling back later because the first weight was not the right call.
ISMI springs are known for flat wire construction, aerospace-spec material, heat treatment, shot peening, stress relieving, and long service life. This pack gives you two commonly used reduced-power compact spring weights in one clean buy, which makes it useful for range tuning, compensated setups, lighter ammo testing, or keeping a spare on deck.
Fitment
- Fits compact Glock family models commonly listed as Glock 19, 23, 25, 32, and 38
- Built for compact / medium-frame spring applications
- Designed for use with a compatible guide rod setup
Does NOT fit
- Does not fit full-size, subcompact, or slimline Glock models
- Does not include a guide rod
- Do not assume Gen 4 or Gen 5 dual recoil spring assembly compatibility unless your setup has the correct conversion parts and guide rod
What it does
This bundle gives you two recoil spring weight options so you can tune slide movement and cycling behavior around your actual setup instead of guessing once and hoping for the best. The spring weight you run can affect slide speed, felt recoil, cycling consistency, and how the pistol behaves with different ammo or compensator setups.
Why it’s worth it
The value here is simple: you get both spring weights in one shot, which saves time, gives you flexibility, and makes more sense than buying one spring, testing it, then ordering the other one later because the gun decided to be picky. This is a practical bundle for builders, tinkerers, and shooters who actually test their setups instead of just posting about them.
Specs
- Brand: ISMI
- Product type: Flat wire recoil spring bundle
- Fitment: Glock 19 / 23 / 25 / 32 / 38 compact models
- Included spring weights: 13 lb and 15 lb
- Construction: Flat wire
- Material: Aerospace-spec material
- Manufacturing notes: Heat treated, shot peened, and stress relieved
- Quality control: ISO 9002 standards
- Warranty: 12 month manufacturer replacement warranty
- Stock compact reference weight commonly listed: 18 lb
What’s included
- 1 x ISMI compact recoil spring – 13 lb
- 1 x ISMI compact recoil spring – 15 lb
Install notes
These are recoil springs only, not a complete captured guide rod assembly. Recoil spring buffers are generally not recommended in ISMI-related seller guidance because they can reduce slide travel and create reliability problems. Function test the pistol with your actual ammo after installation before trusting any tuned setup.
From the Forge Files
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Run 15lb with hotter ammo
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Run 13lb with lighter range ammo
Most shooters are shocked how much better the gun feels with nothing but recoil tuning.
Forge Files — Real Data, Not Opinions
We don’t guess and we don’t hype. The Forge Files are IronKells’ testing library: measured pull weights, connector angles, striker springs, plunger spring combinations, and real-world ignition data using common carry loads. Click the Forge Files link on this page for step-by-step build sheets, load-specific notes, and the test logs we ran on Gen5 frames. If you need advice please take a look at our FORGE FILES!!
Here are relevant options to get you started:
⚠ Glock Disclaimer
IronKells Armory LLC is not affiliated with, endorsed by, or sponsored by Glock, Inc. or Glock Ges.m.b.H.
All references to GLOCK® are used solely to identify firearm models, parts compatibility, and fitment information for customers. Glock is a federally registered trademark of Glock, Inc. and Glock Ges.m.b.H.
Any product sold on this site referencing Glock is aftermarket, not OEM, and is not manufactured by Glock. Glock does not warranty, authorize, or guarantee the performance, safety, or reliability of any third-party components or modifications.
Firearm parts should be installed by a qualified armorer or gunsmith. Improper installation, modification, or use of aftermarket components may affect firearm safety, reliability, and void manufacturer warranties. By purchasing and installing third-party parts, the buyer assumes all responsibility for safe handling, installation, function testing, and use of their firearm and accessories.
