Shop All M4 Parts.
Browse the complete Speedsoft Direct M4 parts collection. Shop internal upgrades, external components, replacement parts and performance upgrades for custom, competitive and speedsoft M4 platforms.
Upgrade Every Part Of Your M4
Browse the complete M4 collection below, including upgrade parts, replacement components and performance equipment for custom and competition-focused builds.
Shop All M4 Parts
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All Products
AirTac Customs “Shard” Aluminum M4 Mag Release
£32.99 Select options This product has multiple variants. The options may be chosen on the product page -
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AirTac Customs ABS CRBN Gen 5 Upper
£159.99 Select options This product has multiple variants. The options may be chosen on the product page -
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AirTac Customs Aluminum Endcap
Original price was: £39.99.£29.99Current price is: £29.99. Select options This product has multiple variants. The options may be chosen on the product page -
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AirTac Customs Aluminum M4 Body Pin
Original price was: £14.99.£12.99Current price is: £12.99. Select options This product has multiple variants. The options may be chosen on the product page -
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AirTac Customs Aluminum M4 Pivot Pin
Original price was: £14.99.£12.99Current price is: £12.99. Select options This product has multiple variants. The options may be chosen on the product page -
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AirTac Customs Apex M4 Trigger Guard
£24.99 Select options This product has multiple variants. The options may be chosen on the product page -
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AirTac Customs M4 Scythe Tunable Trigger
Original price was: £32.99.£29.99Current price is: £29.99. Select options This product has multiple variants. The options may be chosen on the product page -
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AirTac Customs Precision Steel Inner Barrel
£21.99 Select options This product has multiple variants. The options may be chosen on the product page -
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AirTac Customs x MAC Gen 3 Cerakoted Skeletonized CRBN Gearbox
Original price was: £110.99.£99.99Current price is: £99.99. Select options This product has multiple variants. The options may be chosen on the product page -
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AirTac Customs x Polarstar Blackout F2 HPA Engine
Original price was: £449.99.£429.99Current price is: £429.99. Read more -
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Monk x Polarstar – ESG-MR
£179.99 Select options This product has multiple variants. The options may be chosen on the product page -
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Polarstar F2 – HPA Conversion Kit – M4
Original price was: £449.99.£429.99Current price is: £429.99. Read more -
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Polarstar Wire Harness Rev. 2
£13.99 Select options This product has multiple variants. The options may be chosen on the product page -
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SPEED Airsoft HPA Tunable BLADE Trigger
£29.99 Select options This product has multiple variants. The options may be chosen on the product page
Build Your M4 Properly.
Not sure which M4 parts work together? Speak to Speedsoft Direct and we can help you select compatible internal and external components for a reliable, responsive and properly matched M4 platform.