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There’s a sweet satisfaction to feeling a well built full-metal M4 receiver. Durable externals that don’t bend or wobble under stress inspire confidence that you can take that rifle through hell and back and have it keep kicking. But, not all M4s come right out of the box with full-metal components. When getting into airsoft, many players opt for a more budget-friendly polymer body in order to keep down on costs and get themselves into the airsoft-fight with less of an initial investment. Having a lightened rifle can certainly be practical with its reduced weight and ease of manipulation, but you might find it to feel a bit uninspiring. While certain polymer body M4s can be decently durable, having a solid full-metal build can elevate both your in-game immersion and trust in your primary to handle all battle conditions. Is that insecure, crunchy polymer body starting to get to you? It might be time for an upgrade.


If you currently have a polymer bodied rifle and would love to see it upgraded with a high quality metal receiver, Madbull Airsoft might have the perfect selection for you.




You might be wondering, “Why is the bull so mad?” Long ago, this bull had a G&G Combat Machine M4. He loved how the rifle performed and often boasted about how he could easily take out players over 150ft away with ease. However, one fateful day, the bull dove a little too hard when trying to round a corner to secure a few aggressive eliminations. He slid, and fell rifle-first. As soon as he regained awareness, his beloved Combat Machine’s polymer body laid before him, shattered into pieces. A thunderclap and sudden downpour of rain accompanied a tear that ran down the bull’s face as he stared at his broken beloved. As BBs showered down upon him from opposing team for over-extending his position, he wailed into the stormy sky, swearing that he’d ensure his rifle would never crumble again.

Or was that the origin of Sadbull? Nevermind-

Madbull is a prominent provider of heavy duty aftermarket external parts for a variety of airsoft rifles (though mostly M4). Through their various licensing agreements with a plethora of real-steel brands, they use their attention to quality and detail to bring the airsoft community high-end external parts. If you’re planning a fancy M4 build with a custom rail, receiver, suppressor, or flash hider, you’re definitely going to want to take a look through Madbull’s catalog.



A common trait many budget rifles have in common is substituting a full metal receiver build construction for polymer. Polymer is certainly lighter than metal, making it a good choice for younger players who've yet to build up their strength. But if you want a grit-and-glory airsoft battle machine that can handle years of abuse, upgrading to a metal receiver is the for sure way to go. And, if you want that aftermarket receiver to have a degree of quality to it that makes it feel more than just a spare part, Madbull is the for-sure way to do it.



By the way, all Madbull branded receivers come with their full-metal hop-up unit assembly as well!

A Wide Assortment of Rail Options!

If your M4s handguard isn’t quite meeting your standards for feel and attachment options, it may be time for an upgrade. Madbull rails are one of the top options for aftermarket airsoft handguards, and their wide array of licensed options ensure that you can find the parts for the setup of your dreams.







A sweet flash hider or suppressor can make all the difference in how sweet your M4 looks. If you’re looking for one with a degree of authenticity and feel close to that of the real steel world, choose Madbull!







For those who crave a more immersive and reliable experience in their airsoft battles, investing in a quality full-metal M4 body is a wise decision. It not only enhances the feel and realism of the game but also inspires confidence in the equipment's ability to withstand the rigors of intense gameplay. If the limitations of a polymer body are diminishing your airsoft experience, it's time to consider upgrading to a full-metal build. It’s time to go Madbull.