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The EPES M249 Hop-Up Chamber is a high-end upgrade part designed for M249 / MINIMI airsoft guns. Built for maximum performance, precision and reliability, this CNC-machined hop-up chamber gives your support weapon a more consistent and adjustable hop-up system.
The chamber uses standard AEG hop-up buckings, making it compatible with a wide range of commonly available buckings. Its precisely designed bucking lip seat helps improve air seal and feeding reliability, while the vertically seated pressure bar works especially well with Maple Leaf hop-up buckings.
Hop-up adjustment is handled with a 360° regulator wheel, allowing precise and repeatable tuning. The adjustment direction is clearly marked, making setup easier even during maintenance or field preparation.
The chamber is made from EN AW 7075-T6 aircraft-grade duralumin and finished with a proven H+PTFE surface treatment. This gives the chamber excellent durability, smooth operation and a premium feel. Made in the Czech Republic, this is a serious upgrade for players who want to get the most out of their M249 platform.
Compatibility
Designed for M249 / MINIMI airsoft guns
Compatible with A&K, P&J and Classic Army models
Designed for standard AEG hop-up buckings
Works especially well with Maple Leaf hop-up buckings
Key features
High-end CNC-machined hop-up chamber for M249 / MINIMI airsoft guns
Precise 360° hop-up adjustment wheel
Clearly marked hop-up adjustment direction
Designed for AEG hop-up buckings with standard lip length
Spacer sleeves included for buckings with longer lips
Vertically seated pressure bar for improved hop-up performance
Adjustable chamber clearance against the gearbox opening with included O-rings
Multiple fixation options to help prevent chamber rotation
Replaceable feed assembly mounting pin
Made from EN AW 7075-T6 aircraft-grade duralumin
H+PTFE surface finish
Made in the Czech Republic
Package contents
1 × hop-up chamber
1 × hop-up pressure bar regulation ring
1 × pressure roller
2 × O-rings for securing the regulator ring, 9 × 1.5 mm
2 × O-rings for adjusting chamber clearance against the gearbox opening, 6 × 1 mm and 9 × 1 mm
2 × spacer sleeves for hop-up bucking lip, 0.1 mm and 0.2 mm
4 × grub screws for fixing the inner barrel inside the hop-up chamber, 2 × M3×5 and 2 × M3×4
1 × M3×12 grub screw for fixing the hop-up chamber inside the outer barrel housing
1 × longer replacement pin for mounting the chamber inside the feed assembly
Please note
Correct installation and alignment are important for reliable feeding, air seal and overall performance. Make sure the chamber is properly seated, the bucking is correctly installed and the BB path is unobstructed before use.
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