{"product_id":"retroarms-m4-ar15-cnc-aluminum-pro-rotary-hop-up-chamber-by-retroarms","title":"RetroArms M4 - AR15 CNC Aluminum Pro Rotary Hop Up Chamber by RetroArms","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan style=\"color: #ff0000;\"\u003eCNC Aluminum Rotary Hop Up Chamber M4 - AR15 PRO.\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: #000000;\"\u003eThis Hop Up chamber is a slightly redesigned version of the RetroArms hop up Basic chamber.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eIt is machined on a precise CNC machine from aviation grade duralumin EN AW 7075 and anodized.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #ff0000;\"\u003eThis hop up chamber is R-hop (Rotary) ready and is meant to be used in setups, which have troubles with magazine\u003cbr\u003einstallation in the body, which are not unlocking and feeding.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eThe feeding shaft screwed in without any shims sits in the same position as the shaft of the Basic hop up chamber.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eThe height of the feeding shaft can be adjusted by 0.2 mm increments with included shims.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eAfter assembly and tuning we recommend securing the adjustable feeding shaft with medium strength thread glue.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eOn a feeding shaft, you can find an o-ring, which prevents those \"usual\" 4bb from falling out when reloading.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eAnother feature is a collet nut instead of a centering ring in the front of the chamber.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eWhen the collet nut is tightened, it holds the inner barrel and the chamber tightly together and thus mitigating any movement of the barrel.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eJust make sure that you do not let the barrel rotate in the chamber when you tighten the nut.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eAnother advantage of this nut is that it can hold barrels with different outer diameters, typically 8.4 - 8.5 mm.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eRecent fine tuning of the main shaft and feeding shaft ensures compatibility with most hop up rubbers and improves feeding \u003cbr\u003ereliability and consistency of the chamber.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eThe adjustable feeding shaft part is identical with the one on the Ultra version.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003eWeight: 18gr.\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003ePer info e\/o acquisto veloce senza account:\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"color: #000000;\"\u003einfo@softair-italia.it\u003c\/span\u003e\u003c\/p\u003e","brand":"Retro Arms","offers":[{"title":"Default Title","offer_id":50170755088727,"sku":"RA-9426-JO\/SIERRA","price":60.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/6346\/5367\/files\/retroarms_m4_-_ar15_cnc_aluminum_pro_hop_up_chamber_by_retroarms_2x_40b3dcca-51a3-4326-9d8b-f9956b7dd6f4.png?v=1741861768","url":"https:\/\/www.softair-italia.it\/products\/retroarms-m4-ar15-cnc-aluminum-pro-rotary-hop-up-chamber-by-retroarms","provider":"Softair Italia","version":"1.0","type":"link"}