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BC Custom

BC Custom - Hyperbloc100 and Valve Housing Upgrade for FX Impact M3/M4

(4 reviews) Write a Review
SKU:
APBC0078
$349.00

Out of stock

Description

Designed and manufactured by BC Custom (Bullet Central's in-house manufacturing brand) and the renowned Ernest Rowe, the BC Custom Hyperbloc100 and Valve Housing Upgrade is a precision-fit performance kit for your FX Impact M3 or M4, designed to enhance reliability and overall shooting efficiency. Built for shooters who want more from their setup, this anodized aluminum upgrade adds a full 44cc to bring total plenum capacity up to 100cc.

This black aluminum kit includes an upgraded valve housing and is precision machined on high-tech equipment for a refined fit and durable construction. It is designed to help marksmen achieve the same velocity with 10 to 25 bar less regulator pressure, making it a smart choice for those focused on optimizing performance from their FX Impact platform.

  • Compatible with FX Impact M3 and FX Impact M4 models
  • Adds 44cc for a total plenum capacity of 100cc
  • Includes upgraded valve housing
  • May allow the same velocity with 10 to 25 bar less regulator pressure
  • Precision machined aluminum construction
  • Anodized black finish

For shooters looking for a Hyperbloc100 upgrade for FX Impact M3 or M4 rifles, this kit offers a purpose-built solution for improved air management and dependable performance.

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Additional Information

Finish:
Anodized
Material:
Aluminum
Model / Type:
FX Impact
Color:
Black
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4 Reviews

  • 2
    HyperBloc 100

    Posted by Brooks Christensen on Apr 7th 2026

    After installation I'm giving this product 2 stars because the 4 tapped holes in the top of the Hyper Bloc 100 were slightly misaligned. After 2 hours of trying everything to get all four screws started I used a 2 mm drill bit to elongate the 4 backbone holes about a half mm so I could get the screws started. They were a very tight fit at that, but I think I got them in without cross threading or stripping them out. I didn't take it apart to find out. Disappointing that I had to remove metal off the perfect backbone of my M4 for a $350 aftermarket part. In my case the second batch also has problems. Out of the thousands I've spent on aftermarket parts this is the first miss fitting thing I've purchased.

  • 4
    hyperbloc100

    Posted by nick merolli on Mar 26th 2026

    very well made lots of thoughts went into this does what it supposed to and then some.. now awaiting another..

  • 4
    hyperbloc100

    Posted by nick merolli on Jan 21st 2026

    very well machined plenum works as should

  • 5
    hyperblock100

    Posted by dominic civiletti on Jan 15th 2026

    good product! Fast delivery!

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