Transform your standard AR-15 lower receiver into a versatile 9mm platform with the Sylvan Arms 9mm Conversion Block for SIG P320 Magazines. This precision-engineered drop-in adapter allows you to seamlessly integrate SIG P320 9mm magazines into your Mil-Spec AR-15 setup, eliminating the need for a dedicated pistol-caliber lower. Perfect for enthusiasts seeking modular firearm configurations, this conversion block delivers reliable performance for training, competition, or personal defense without compromising on quality or compatibility.
Key Features
- Drop-In Installation: Effortlessly installs into any Mil-Spec AR-15 lower receiver, requiring no permanent modifications for quick swaps between calibers.
- SIG P320 Magazine Compatibility: Supports standard SIG P320 9mm magazines, including 15-round, 17-round, and 30-round capacities, ensuring smooth feeding and reliable operation.
- High-Strength Construction: Crafted from durable 6061 aircraft-grade aluminum with a black anodized finish for corrosion resistance and long-lasting durability in demanding conditions.
- Enhanced Versatility: Converts your existing AR-15 lower to handle 9mm rounds, reducing space in the magazine well for improved stability and handling.
Specifications
- Material: 6061-T6 Aluminum
- Finish: Black Anodized
- Weight: 5.79 oz
- Dimensions: Length 8.1 in, Width 4.35 in, Height 1.4 in
- Compatibility: Mil-Spec AR-15 lowers and SIG P320 9mm magazines
- Warranty: Limited lifetime warranty from Sylvan Arms
Why Choose This Product
Address common challenges like limited caliber options and the expense of multiple lowers with this innovative conversion block. It solves the pain point of magazine incompatibility by bridging the gap between AR-15 platforms and popular SIG P320 magazines, allowing you to leverage affordable, high-capacity 9mm ammo for cost-effective shooting sessions. Users appreciate its straightforward setup, which minimizes downtime and maximizes modularity—ideal for those building custom AR-9 configurations. Backed by Sylvan Arms’ commitment to quality, this block ensures consistent reliability, whether you’re plinking at the range or honing tactical skills.
Elevate your firearm’s potential today. Add the Sylvan Arms 9mm Conversion Block to your arsenal and experience the freedom of a multi-caliber setup that adapts to your needs.
Frequently Asked Questions
Is this conversion block compatible with all AR-15 lowers?
Yes, it is designed for standard Mil-Spec AR-15 lower receivers, ensuring a secure fit without alterations.
How do I install the conversion block?
Installation is simple: Drop it into the magazine well and secure with the provided set screws—no tools or modifications required for basic setup.
Does it work with extended SIG P320 magazines?
Absolutely, it supports various capacities including 15rd, 17rd, and 30rd SIG P320 9mm magazines for flexible loading options.



