M870 M4 Adapter
$19.99
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Proudly Made in the US 1-Year Warranty + Lifetime Support *
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M870 M4 Adapter Details
M870 M4 Adapter
The TAPP M870 M4 Adapter upgrades your reliable 3-shot pump-action M870 with M4 AEG magazine compatibility for faster reloads and expanded capacity—now 3D printed in Nylon PA12 with the option of upgrading to PA11 Carbon Fiber for superior strength, durability, and long-term performance. Designed and built in the USA, this pre-built, plug-and-play adapter integrates seamlessly with your M870 and other tri-shot platforms.
Key Features:
– M4 Magazine Compatibility: Adapt your M870 to use standard M4 AEG magazines for a major boost in ammo capacity and reload efficiency.
– One-Piece Adapter Design: Engineered for smooth, reliable BB feeding and consistent performance under high-use conditions.
– Versatile Fit: Works with the M870 and almost any tri-shot shotgun, making it a flexible upgrade across platforms.
– Nylon PA12 with the option of upgrading to PA11 Carbon Fiber Construction: 3D printed in carbon fiber–reinforced Nylon PA11 for enhanced rigidity, impact resistance, heat stability, and longevity—lighter weight without sacrificing strength.
What’s Included:
– Fully Assembled Adapter: Ready to use out of the box with no modifications to your existing magazines.
Proudly made in the USA. Backed by a 30-day warranty and lifetime technical support, with access to replacement parts (fees may apply).
Compatibility: M870 and almost any tri-shot shotgun
CARBON FIBER. CARBON FIBER.CARBON FIBER.
Strength you can feel. Weight you barely notice. Precision that defines performance. Matte black, rigid, and ready — engineered for those who demand more than plastic.
Unmatched Strength and Rigidity
• Up to 38% Higher Tensile Strength – 69 MPa vs. 50 MPa for Nylon 12, giving parts more load-bearing capability. • Nearly 3× Stiffer – With a tensile modulus of 5.3 GPa (vs. 1.9 GPa), PA11 CF parts hold their shape under pressure and stress. • Over 65% Greater Flexural Strength – 110 MPa vs. 66 MPa for Nylon 12 means stronger parts that won’t bend or deform.
Superior Heat and Environmental Resistance
• Designed for high-temperature applications where Nylon 12 softens or degrades. • Carbon fiber reinforcement improves thermal stability and lowers thermal expansion for precision even under heat. • Naturally resistant to moisture and UV exposure, ideal for rigorous outdoor use.
Professional Finish and Lightweight Design
• Carbon fiber infusion produces a sleek matte black surface — functional and aesthetic right off the printer. • Delivers metal-like strength at a fraction of the weight, enabling lighter, more efficient assemblies.
Designed for High-Pressure HPA systems
• Lightweight carbon fiber composite reduces load without sacrificing strength or rigidity. • Tested for durability across extreme temperature and humidity conditions to ensure reliable field performance.
Rigid Carbon Fiber Structure
• Low expansion under heat preserves airseal integrity during rapid-fire or sustained full-auto use. • Machined precision surfaces ensure smooth magazine insertion and consistent alignment with feed paths.
Custom Cerakote & Precision Coatings
Our in-house finishing delivers Cerakote and precision laser engraving with exceptional durability and style. Every surface is treated, coated, and inspected to ensure flawless performance and lasting quality.
Start Your Project1 Year Warranty + Lifetime Support
All Tapp Airsoft products include a 1-year warranty. We also offer lifetime support for technical issues and replacement parts (fees apply).
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1 review for M870 M4 Adapter
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PRO ADAPTER
Designed for added Performance, Ergonomics and Aesthetics.
20-80% Condensed Dimensions
We've designed each system to create the sleekest profile.CNC Feed Nozzle
Areas under repeated use or load have been upgraded with replaceable CNC parts.0.01mm Precision Tolerances
BB-Stop tech optimized for flow and consistency.Individually Designed
Drums and mags are positioned to give a “meant-to-be-there” feel.
Chris M. –
I got this about a month ago for my TM Breacher. It was easy to install (Just removing the shell door) and has worked perfectly! It’s built well and I have no complaints!