Sparrow Dynamics

Sparrow Dynamics manufactures and sells California-legal featureless AR-15 rifle grips and components—the kind of parts you need to stay compliant without a bullet button or magazine lock. Their flagship product is the CRG-15 Compliant Rifle Grip, engineered specifically to help shooters navigate California's complicated assault weapon regulations.

Their product lineup includes:

• •AR-15 grips (featureless designs)
• •Upper parts (barrels, bolt carriers, handguards)
• •Lower parts (triggers, springs, receivers)
• •Muzzle devices (flash hiders, brakes)
• •Eye and ear protection
• •Tactical gear
• •Company swag and branded merchandise

Their website is a live inventory system. If you can add it to your cart, they have it in stock. No backorders—they don't sell things they don't have.

Located in Shingle Springs, California, they aim to ship the next business day after order placement (closed Saturday and Sunday). Standard rates:

Sparrow Dynamics goes beyond just selling parts. Their website includes:

• •Detailed featureless build information with official California DOJ definitions
• •Links to the Michel & Associates Assault Weapons Quick Reference Guide (prepared with the California Rifle & Pistol Association)
• •Up-to-date tracking of Duncan v. Becerra/Bonta magazine capacity litigation
• •Clear explanations of what "featureless" actually means under California law
• •Graphics and PDFs to download and keep in your range bag

They've tracked the magazine capacity court battles through multiple rulings and provide current status updates—including details on the Supreme Court petition filed in August 2025 (Case #25-198) and when decisions might come down.

If you're building in California, you need to understand the difference between:

• •Featureless design (no pistol grip, thumbhole, folding stock, etc.)
• •Fixed magazine (permanently attached, requires action disassembly to remove)
• •Detachable magazine with bullet button (now classified as an "assault weapon" under 2017 law changes)

Their site explains California Code of Regulations Title 11, Division 5, Chapter 39 in plain language—covering everything from barrel length definitions to what constitutes a "forward pistol grip" under state law.

• •Online store with account management options
• •Customer service and FAQ section
• •Dealer terms and wholesale applications available
• •Newsletter signup for product updates

Sparrow Dynamics operates as a straightforward parts supplier for shooters who want California compliance without compromising function. They stock what they sell, ship fast, and provide the legal context you need to make informed build decisions.