{"product_id":"retro-arms-cnc-machined-m4-basic-hop-up-chamber","title":"Retro Arms CNC-machined M4 BASIC hop-up chamber","description":"\u003cp\u003eRetroArms CNC-machined M4 BASIC hop-up chamber is an upgrade part for AR-15\/M4-type AEG airsoft guns that improves accuracy and reliability. It is made from extremely strong EN AW 7075 aircraft-grade aluminum and finished with anodizing, making it lightweight, durable, and corrosion-resistant.\u003c\/p\u003e\n\u003cp\u003eThe BASIC model features a simple yet highly dependable design with no complicated adjustments. It is ready to use out of the box and compatible with most AEG hop-up buckings. The chamber is also R-hop ready, making it an excellent foundation for future accuracy-focused tuning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision-machined from EN AW 7075 aluminum - excellent rigidity and durability.\u003c\/li\u003e\n\u003cli\u003eA collet nut locks the inner barrel firmly in place and prevents movement, improving accuracy and shot-to-shot consistency.\u003c\/li\u003e\n\u003cli\u003eAn O-ring in the feed channel prevents BBs from falling out during magazine changes and ensures a tight seal between the nozzle and the chamber.\u003c\/li\u003e\n\u003cli\u003eCompatible with most AEG hop-up buckings and inner barrels (outer diameter approx. 8.4-8.5 mm).\u003c\/li\u003e\n\u003cli\u003eR-hop-ready design that provides a stable, airtight platform for future upgrades.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWho this is for\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThis hop-up chamber is an excellent choice for players who want to:\u003c\/li\u003e\n\u003cli\u003eImprove accuracy and consistency without complex adjustments.\u003c\/li\u003e\n\u003cli\u003eEnsure reliable feeding and an airtight connection between the nozzle, hop-up chamber, and inner barrel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation tips\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMake sure the inner barrel’s outer diameter is compatible with the collet nut (approx. 8.4–8.5 mm).\u003c\/li\u003e\n\u003cli\u003eTighten the nut carefully, but avoid twisting the inner barrel inside the chamber while tightening.\u003c\/li\u003e\n\u003cli\u003eUse a high-quality hop-up bucking and ensure the nozzle moves freely and makes a tight seal against the front of the chamber.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaterial: EN AW 7075 aluminum (CNC-machined, anodized)\u003c\/li\u003e\n\u003cli\u003eWeight: approx. 18 g\u003c\/li\u003e\n\u003cli\u003eCompatibility: AR-15\/M4-type AEG guns\u003c\/li\u003e\n\u003cli\u003eInner barrel: compatible with barrels with 8.4-8.5 mm outer diameter\u003c\/li\u003e\n\u003cli\u003eType: BASIC (no separate adjustment parts)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Retro Arms","offers":[{"title":"Default Title","offer_id":54236604924252,"sku":"6388","price":39.1,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/6636\/2610\/files\/czesci-wewnetrzne-komory-hop-up-precyzyjna-komora-hop-up-m4-cnc-retroarms-3764116-1.jpg?v=1768553004","url":"https:\/\/atom-airsoft.fi\/en-ie\/products\/retro-arms-cnc-machined-m4-basic-hop-up-chamber","provider":"Atom Airsoft","version":"1.0","type":"link"}