The Best .22 LR Conversion Kits: 2026 Training Guide

In 2026, ammunition costs remain the primary barrier to frequent range time. .22 LR conversion kits offer the ultimate workaround, allowing you to train on your existing frame, trigger, and optics for a fraction of the cost of centerfire rounds.

Whether you are looking to master the “Modern Sporting Rifle” or your daily carry Glock, these kits provide the most realistic training experience without the “bite” of 5.56mm or 9mm prices.

1. Best for Glocks: Advantage Arms (AA)

Advantage Arms is the undisputed leader in the handgun conversion market. Unlike simple “slide swaps,” the AA kit is engineered to maintain the same manual of arms as your factory Glock.

• Last Round Lock Open: A rare feature in the rimfire world, AA kits use a patented magazine design that locks the slide back after the final shot—essential for proper reload training.

• Internal Safeties: These are the only kits on the market that include a functioning firing pin block safety, mirroring Glock’s “Safe Action” system.

• Optics-Ready: As of 2026, many AA kits come pre-milled for micro-red dots, allowing you to train with the same sight picture as your MOS Glock.

2. Best for AR-15s: CMMG Bravo (Stainless Steel)

The CMMG Bravo remains the gold standard for AR-15 owners. It is a true “drop-in” unit that replaces your entire Bolt Carrier Group (BCG) in under 30 seconds.

• Stainless Steel Construction: In 2026, the stainless steel version is the only one to buy. Rimfire ammo is notoriously “dirty,” and the stainless finish allows for easy cleaning even after 1,000 rounds of fouling.

• No Gunsmithing: It uses your existing barrel. While accuracy is slightly lower than a dedicated .22 barrel (due to the 5.56 twist rate), it is more than sufficient for “A-zone” hits and steel transition drills.

• Magazine Ecosystem: CMMG magazines are the most prolific in the industry, making it easy to find high-capacity (25+ round) options for your build.

2026 Performance Comparison

---

Pro-Tips for Rimfire Reliability

Even the best kits can be finicky. To ensure 100% reliability in 2026, we recommend:

1. High-Velocity Ammo: Stick to CCI Mini-Mags (40gr) or Federal AutoMatch. These kits rely on “blowback” energy, and underpowered bulk ammo may fail to cycle the slide.

2. Run it “Wet”: Rimfire conversion bolts like to run with more lubrication than your standard centerfire BCG. A thin coat of high-quality gun grease on the friction rails goes a long way.

3. Dedicated Magazines: Always use the manufacturer-recommended magazines. Feeding angles are critical for the tiny .22 LR rimmed cartridge.

Why Not Just Buy a Dedicated .22 Pistol/Rifle?

While a dedicated firearm (like the Glock 44 or M&P 15-22) is great, a conversion kit allows you to use your exact trigger pull, your specific weapon light, and your customized grip. This makes the training transfer much more effective for defensive shooters and competitors.

[Shop Glock Conversion Kits] | [Shop AR-15 CMMG Kits]