Sylvan Arms AR-15 to 9mm Conversion Block - Glock Compatible

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Why Buy From Us?


Don't see the exact configuration you want? No problem, just let us know. Most of the time we can customize with the parts we have just to your liking.


All our uppers have a Lifetime Warranty to the original purchaser. Some conditions apply - click here for details.

Customer Service

We believe in customer service before and after the sale. We never take days or weeks to respond. Most of the time if you email or leave a message, we usually respond the same day or next business day.

Turnaround Time

Most of our uppers are built to order. Our most important goal is to get your order to you as quickly as possible without sacrificing quality. Please check the live status update on the banner above and/or on our homepage for current processing times.


We always specify the manufacturer of the major components therefore you know what you are getting. We only use quality components from well-known manufacturers.

Comes in OEM packaging - we do not have retail packaging for these

The Sylvan Arms 9mm Conversion Block is a drop-in fit to give you a 9mm capable lower without resorting to buying a pistol caliber specific option. Designed to install in Mil-Spec lowers almost exactly like a standard rifle magazine.

  • Easy to install and swap out

  • Accepts popular Glock Compatible 9mm magazines

  • Designed to work with Mil-Spec lowers

  • Does NOT include last round bolt hold open

Product Details

  • Material: Steel and 6061-T6 Aluminum

  • Finish: Black Anodized

  • Weight: 4.2 oz.

Designed, built and assembled in the USA




DISCLAIMER:  This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols. 

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Pistol Caliber 9mm
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