{"product_id":"action-army-piano-wire-aeg-spring","title":"Action Army Piano Wire AEG Spring","description":"\u003cdiv style=\"background:#edfaf1;border-left:4px solid #27ae60;padding:12px 16px;border-radius:0 6px 6px 0;margin:0 0 16px;font-size:13px;\"\u003e\n\u003cstrong style=\"color:#1a6b3a;\"\u003eAction Army Piano Wire AEG Spring — six ratings of piano wire, from a site-legal M95 up to an M150.\u003c\/strong\u003e The cheapest part in the gearbox and the one that decides what the rifle chronos at.\n\u003c\/div\u003e\u003cp\u003eMain springs are consumables with opinions. The wire they are wound from decides how evenly they compress, how quickly they sag, and whether the rifle still chronos the same in March as it did in October. Action Army wind these from piano wire, which is the harder, more consistent end of the material scale.\u003c\/p\u003e\u003cp\u003eSix ratings run through the range. The M95 is the gentlest, and Action Army put a one-joule figure against it; the M100 sits just above. Those two are the skirmish ratings that keep a rifle comfortably inside a UK site limit. From the M120 upward you are into tuning territory, and the M130, M140 and M150 only earn their keep on a build with the barrel, hop and ammunition to turn the extra energy into range rather than noise.\u003c\/p\u003e\u003cp\u003eChanging a main spring is the first job anyone learns on a gearbox and the one most likely to be done badly. The spring itself is simple; closing the shell again without pinching a wire is the part that takes practice.\u003c\/p\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eSpecifications\u003c\/h2\u003e\u003ctable style=\"width:100%;border-collapse:collapse;font-size:13px;margin:0 0 18px;\"\u003e\n\u003ctr style=\"background:#1B3A6B;color:#fff;\"\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eRatings offered\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eM95, M100, M120, M130, M140, M150\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003ePiano wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eStated output\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eOne joule for the M95; no figure published for the other ratings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eFitment\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eStandard AEG gearboxes taking a conventional main spring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eManufacturer codes\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eM95 A06-001, M100 A06-002, M120 A06-003, M130 A06-004, M140 A06-005, M150 A06-006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eFree length and wire gauge\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eNot stated by the manufacturer at time of writing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eAction Army\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eGood to know before you buy\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eChrono after every spring change, without exception.\u003c\/strong\u003e The same rating behaves differently depending on cylinder volume, air seal, barrel length and the weight of ammunition you feed it, so the number on the wire is a starting point rather than a result.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eA heavier spring loads everything behind it.\u003c\/strong\u003e Piston, sector gear, bushings and motor all take more punishment, and the first part to complain is usually the one that was already tired. Worth looking over the \u003ca href=\"\/collections\/gearbox-parts\" style=\"color:#1B3A6B;\"\u003erest of the gearbox\u003c\/a\u003e while the shell is open.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe full ladder is here.\u003c\/strong\u003e All six Action Army ratings are listed, so you can step one rating at a time instead of jumping from an M100 to an M130 and hoping.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpring and battery are one decision.\u003c\/strong\u003e A heavier spring pulled by an underpowered pack gives a slow, inconsistent first shot and a hot motor.\u003c\/p\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhich rating keeps me inside a site limit?\u003c\/strong\u003e\u003cbr\u003eMost UK skirmish limits sit around the M95 to M100 range on a standard setup, but that depends on your own gearbox, so chrono it rather than taking our word for it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the one joule figure against the M95?\u003c\/strong\u003e\u003cbr\u003eThat is Action Army’s own designation for that spring. They publish no equivalent figure for the heavier ratings.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy piano wire?\u003c\/strong\u003e\u003cbr\u003eIt is harder and more consistent than ordinary spring steel, which shows up as less sag over a season and a more repeatable chrono reading.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a new piston to go with it?\u003c\/strong\u003e\u003cbr\u003eNot for the lighter ratings. Above an M100 it is worth checking the piston teeth and the first tooth in particular before you close the shell.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long does a main spring last?\u003c\/strong\u003e\u003cbr\u003eUntil the chrono says otherwise. A spring that has sagged will read lower than it did when new, and that is the signal to change it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this fit a version 2 and a version 3 gearbox?\u003c\/strong\u003e\u003cbr\u003eYes, it is a conventional main spring and not cut for one shell type.\u003c\/p\u003e\u003cdiv style=\"background:#1B3A6B;color:#fff;padding:12px 16px;border-radius:6px;margin:18px 0 0;font-size:13px;\"\u003e\n\u003cstrong style=\"color:#fff;\"\u003e💡 Titan Forge Airsoft tip:\u003c\/strong\u003e Buy the next rating down from where you think you need to be. Coming up a spring is a twenty-minute job; being sent home from the chrono is a wasted day. More in \u003ca href=\"\/collections\/springs\" style=\"color:#cdd6f4;\"\u003eour springs section\u003c\/a\u003e.\n\u003c\/div\u003e","brand":"Action Army","offers":[{"title":"M95","offer_id":55739627700600,"sku":"22831089","price":8.95,"currency_code":"GBP","in_stock":true},{"title":"M100","offer_id":55739627962744,"sku":null,"price":8.95,"currency_code":"GBP","in_stock":true},{"title":"M120","offer_id":55739959935352,"sku":null,"price":8.95,"currency_code":"GBP","in_stock":false},{"title":"M130","offer_id":55739627995512,"sku":null,"price":11.95,"currency_code":"GBP","in_stock":true},{"title":"M140","offer_id":55739959968120,"sku":null,"price":11.95,"currency_code":"GBP","in_stock":false},{"title":"M150","offer_id":55739628028280,"sku":null,"price":11.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/ActionArmyPianoWireAEGSpring_TitanForgeAirsoft.webp?v=1794666862","url":"https:\/\/www.titanforgeairsoft.com\/products\/action-army-piano-wire-aeg-spring","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}