Benelli M4

Benelli M4 parts and accessories are built around one of the most proven semi-auto shotguns ever made. If you own an M4, you already know reliability is the standard. Upgrades should match that.

This category includes parts to improve capacity, control, and overall handling without compromising the system. Not every aftermarket part meets that bar.

We carry Benelli M4 upgrades that fit correctly, run reliably, and hold up under real use, so you can improve your setup without introducing problems.

S&J Hardware Benelli M4

The Benelli M4 is one of the most reliable semi-automatic shotguns ever built. Military-tested, law enforcement-trusted, and capable right out of the box. Upgrades should meet that same standard.

We carry Benelli M4 parts and accessories focused on improving capacity, control, and handling without introducing reliability issues. Every part we stock is selected for correct fitment and real-world durability — not just aftermarket availability.

FAQ

What magazine extensions are compatible with the Benelli M4?
The Benelli M4 uses a proprietary magazine tube system. Not all extensions are compatible — you need M4-specific parts. We carry extensions designed specifically for the M4 that thread correctly and feed reliably. Always verify the extension is rated for the M4 before purchasing from any source.
Can I increase the capacity of my Benelli M4?
Yes. The standard M4 ships with a 5-round tube in many configurations due to import restrictions. Aftermarket magazine extensions can bring capacity up to 7 or more rounds depending on the extension length and shell size. Make sure your replacement spring is matched to the new tube length.
Do Benelli M4 upgrades void the warranty?
Installing aftermarket parts can affect your factory warranty. If your M4 is still under warranty and that matters to you, check with Benelli before modifying. For most owners with a gun past warranty or used for duty or defensive purposes, the right upgrades are worth the trade-off.
What is the difference between the Benelli M4 and M2 for parts compatibility?
The M4 and M2 are different operating systems — the M4 uses ARGO (Auto-Regulating Gas-Operated) and the M2 is inertia-driven. Most parts are not cross-compatible. Magazine extensions, stocks, and other accessories are platform-specific. Always confirm the part is listed for your exact model.

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