At Olympic Arms we manufactuer several unique caliber conversion systems for the AR-15 and its variants.  Our kits are designed in a way that makes them easy to install without tools.  They are easy to use and are interchangeable with other AR-15 parts and kits.

The 2217 Partner system can be used with any complete mil-spec lower receiver.  Simply put the top end assemly on your lower.  Insert the desired sleeve with bolt carrier assembly.  Put an insert in your mag and the system is installed.  No tools, just a couple minutes.

The RFA Rimfire Adapter isn't as accurate as our Partner system but this conversion lets your complete .223/5.56 AR-15 quickly adapt for .22 Long Rifle.  Pivot the AR-15 open, and swap your .223/5.56 bolt carrier assembly with the RFA bolt carrier assembly.  Put an insert in your mag and it's installed.  Again, no tools and just a couple minutes.

More product details and photos will be added in the future.  See the current Catalog in the mean time.