RTB LEFT HANDED .22LR Conversion - Replaces Standard BCG

RTB .22LR AR Conversion Bolt Group w/ Chamber Adapter (Bravo Pattern • LH)

Turn your left-handed 5.56/.223 AR into an affordable .22LR trainer in seconds—without changing your barrel. This RTB Bravo-pattern .22LR conversion bolt group includes the chamber adapter already installed, so you get the core of a proven drop-in conversion setup while keeping your AR’s familiar controls, trigger feel, and overall handling. It’s a simple way to stack reps, run drills, and spend more time on the range without paying 5.56 prices.

Why You’ll Want It

• Economical training: Keep your AR’s ergonomics while shooting cost-friendly .22LR.
• Drop-in conversion format: Replaces a standard AR-15 BCG in compatible uppers (no barrel swap required).
• Chamber adapter included: Adapter is attached and ready to run.
• Stainless construction: Built for high-volume range time and easy cleanup.

What’s Included

• RTB Bravo-pattern .22LR conversion bolt group
• Chamber adapter (installed/attached)

Not Included: Magazine (this listing is the bolt group + chamber adapter only).
Must Have Dedicated .22lr Magazine Designed to Fit AR-15 Platform.

~ Find .22LR Magazines HERE ~

Compatibility

• Upper Receiver: Designed for LEFT-HANDED 5.56/.223 AR-15 upper receiver groups.
• Chamber: Intended for mil-spec 5.56 NATO / .223 chambers. .223 Wylde chambers are not mil-spec, so fit/function is not guaranteed.
• Magazines: Uses Bravo-pattern AR .22LR conversion magazines (sold separately).

Best-Performance Tips (Worth Reading)

• Hammer style matters: A round-style AR hammer is recommended. Notched hammers can cause function issues.
• Ammo preference: Many users see best reliability with 36gr plated round-nose .22LR.
• Training note: This is a rimfire conversion—keep it reasonably lubricated and clean for peak reliability.

Specifications

If you’re building a true trainer clone—or just want a reliable “grab-and-go” rimfire setup for your lefty upper—this RTB conversion bolt group is the foundation. Add the correct Bravo-pattern magazine, feed it quality ammo, and put in the reps.