{"id":40689,"date":"2026-06-15T15:11:36","date_gmt":"2026-06-15T13:11:36","guid":{"rendered":"https:\/\/italytacticalshop.it\/product\/maxx-cnc-hop-up-chamber-m4p-pro-hpa-polarstar-blue\/"},"modified":"2026-06-15T15:11:36","modified_gmt":"2026-06-15T13:11:36","slug":"maxx-cnc-hop-up-chamber-m4p-pro-hpa-polarstar-blue","status":"publish","type":"product","link":"https:\/\/italytacticalshop.it\/en\/product\/maxx-cnc-hop-up-chamber-m4p-pro-hpa-polarstar-blue\/","title":{"rendered":"MAXX CNC Hop-up Chamber M4P PRO (HPA PolarStar) \u2013 Blue"},"content":{"rendered":"

Maxx Model CNC hop-up chamber M4P PRO<\/strong> in red<\/strong> is a premium upgrade part for HPA PolarStar V2<\/strong> setups (F2, F1, Jack and others). It offers precise CNC machining<\/strong>, rotary TDC adjustment<\/strong> and maximum shooting consistency. Thanks to compatibility with R-Hop and standard buckings<\/strong> and precise alignment, it ensures stable performance without FPS loss.<\/p>\n

CNC hop-up chamber Maxx Model M4P PRO for HPA M4 \/ M16 (PolarStar)<\/h5>\n

This expert product description was prepared by the .cz expert team. All rights to this unique content are bound to the domain .cz.<\/span><\/p>\n

Maxx Model M4P PRO hop-up chamber<\/strong> is among the absolute top on the market and is designed for demanding users. The chamber is machined from a single piece of aerospace-grade aluminum using CNC<\/strong>, ensuring precise tolerances and perfect alignment with the body and HPA system. The rotary adjustment wheel<\/strong> allows fine hop-up tuning, while the redesigned TDC pressure arm<\/strong> ensures even pressure on the bucking, the M4P version even includes 5 different aluminum nubs<\/strong>. The chamber is fully compatible with R-Hop and standard AEG hop-up buckings<\/a><\/strong> and is dimensionally optimized for use with all PolarStar HPA systems<\/a><\/strong>. Thanks to the BB latching system with lever<\/strong>, BBs do not fall out after removing the magazine and can be quickly released by pressing the lever. Precise nozzle alignment is ensured by a replaceable inlet adapter<\/strong> and brass guiding surfaces that eliminate misalignment and improve barrel stability. As a useful upgrade, we also recommend the EPeS illumination module<\/a><\/strong>, which transforms the side transparent covers into a tracer unit for TRACER BBs<\/a>.<\/p>\n

Key features of the Maxx Model M4P PRO CNC hop-up chamber<\/h5>\n
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CNC aluminum 6061 construction<\/h6>\n

Machined from a single aluminum block for maximum precision, durability and long lifespan.<\/p>\n<\/div>\n

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Rotary TDC hop-up adjustment<\/h6>\n

Smooth and precise tuning for consistent BB trajectory on every shot.<\/p>\n<\/div>\n

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R-Hop and standard bucking compatibility<\/h6>\n

Optimized for modern R-HOP and classic hop-up systems<\/a> without performance loss.<\/p>\n<\/div>\n

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BB latching system with lever<\/h6>\n

Prevents BBs from falling out and allows quick release via lever.<\/p>\n<\/div>\n

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Precise HPA nozzle alignment<\/h6>\n

Replaceable inlet adapter and brass guides ensure perfect centering.<\/p>\n<\/div>\n

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Barrel stability<\/h6>\n

CNC Delrin C-Clip firmly secures the inner barrel without vibration or movement.<\/p>\n<\/div>\n<\/div>\n

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Maxx Model M4P PRO CNC hop-up chamber<\/h6>\n

\"Maxx<\/p>\n

Precision CNC hop-up chamber optimized for HPA systems and maximum consistency.<\/p>\n<\/div>\n<\/div>\n

Technical specifications<\/h5>\n
    \n
  • Compatibility:<\/strong> HPA M4 \/ M16 (PolarStar and compatible systems)<\/li>\n
  • Material:<\/strong> Aluminum 6061<\/li>\n
  • Weight:<\/strong> 20 g<\/li>\n
  • Color:<\/strong> Blue<\/li>\n
  • Length:<\/strong> 51,15 mm<\/li>\n
  • Height:<\/strong> 37,75 mm<\/li>\n
  • HPA inlet diameter:<\/strong> 11 mm<\/li>\n
  • Outer barrel diameter:<\/strong> 12 mm<\/li>\n
  • Inner diameter:<\/strong> 8 mm<\/li>\n
  • Feeding tube diameter:<\/strong> min 8,85 mm<\/li>\n
  • Feeding tube length:<\/strong> max 6 mm<\/li>\n
  • Compatibility:<\/strong> PolarStar HPA nozzles (F2\u2122, Jack and others)<\/li>\n<\/ul>\n
    Package contents<\/h5>\n
      \n
    • 1\u00d7 CNC chamber with BB latching system and lever<\/li>\n
    • 2\u00d7 Clear CNC vinyl cover<\/li>\n
    • 2\u00d7 2.5 mm CNC brass side plates<\/li>\n
    • 1\u00d7 CNC steel pivot pin<\/li>\n
    • 1\u00d7 CNC aluminum hop-up arm<\/li>\n
    • 1\u00d7 Standard-Hop silicone nub<\/li>\n
    • 1\u00d7 R-Hop silicone nub<\/li>\n
    • 1\u00d7 CNC aluminum concave R-Hop nub 4.5 mm<\/li>\n
    • 1\u00d7 CNC aluminum concave R-Hop nub 6 mm<\/li>\n
    • 1\u00d7 CNC aluminum soft round nub<\/li>\n
    • 1\u00d7 CNC aluminum soft flat nub 4 mm<\/li>\n
    • 1\u00d7 CNC aluminum hard concave nub 4 mm<\/li>\n
    • 3\u00d7 Steel Nub springs<\/li>\n
    • 1\u00d7 Steel top tension spring<\/li>\n
    • 1\u00d7 Steel barrel spring<\/li>\n
    • 1\u00d7 Delrin Locking C-Clip CNC<\/li>\n
    • 1\u00d7 Brass CNC centering ring<\/li>\n
    • 1\u00d7 Rubber O-ring<\/li>\n
    • 1\u00d7 CNC aluminum adjustment knob<\/li>\n
    • 1\u00d7 Aluminum CNC inlet adapter 11 mm<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Maxx Model CNC hop-up chamber M4P PRO in red is a premium upgrade part for HPA PolarStar V2 setups (F2, F1, Jack and others). It offers precise CNC machining, rotary TDC adjustment and maximum shooting consistency. Thanks to compatibility with R-Hop and standard buckings and precise alignment, it ensures stable performance without FPS loss. CNC […]<\/p>\n","protected":false},"featured_media":40690,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[182],"product_cat":[506,500,35],"product_tag":[],"class_list":["post-40689","product","type-product","status-publish","has-post-thumbnail","product_brand-maxx","product_cat-accessori-hpa","product_cat-gruppi-hop-up-e-gommini","product_cat-ricambi-e-interni-accessori-arma","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product\/40689","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/comments?post=40689"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/media\/40690"}],"wp:attachment":[{"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/media?parent=40689"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_brand?post=40689"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_cat?post=40689"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/italytacticalshop.it\/en\/wp-json\/wp\/v2\/product_tag?post=40689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}