{"product_id":"earmor-m11-arc-helmet-rail-adapter","title":"Earmor M11 ARC Helmet Rail Adapter Kit","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;\"\u003eTakes the headband off and puts the cups on your helmet.\u003c\/strong\u003e Tool-free ARC rail mounting, supplied as a pair with fasteners, and the cups rotate 90 degrees out of the way when you are not wearing them.\n\u003c\/div\u003e\n\u003cp\u003eA headband and a helmet compete for the same few centimetres. Run both and something gives: either the helmet sits high, the cups break their seal, or the whole assembly shifts every time you shoulder a rifle. Rail-mounting removes the conflict.\u003c\/p\u003e\n\u003cp\u003eThe M11 clamps into ARC-style accessory rails — the connector on Ops-Core FAST, ACH and MICH helmets and the majority of replicas built on those shells. Fitting takes no tools, so swapping between headband and helmet configurations is a car-park job rather than a bench job.\u003c\/p\u003e\n\u003cp\u003eThe rotary panel is the feature that decides whether people keep their protection on all day. Twist the cups a full 90 degrees and they are clear of your ears for a conversation, a drink or a briefing, without the helmet coming off. A steel guide in the mount does the locating work, so the conversion is quick rather than fiddly.\u003c\/p\u003e\n\u003cp\u003eOne honest caveat on fitment. Earmor's 2026 catalogue puts the M11, M12 and M13 down as the helmet kits for the M33. Earmor's own shops describe the M11 as the part that replaces an M31 or M32 headband. Those are two different answers from the same company, and we have no way to reconcile them from published material, so match the cup boss physically first.\u003c\/p\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eSpecifications\u003c\/h2\u003e\n\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;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eARC helmet rail adapter kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eHelmet compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eARC accessory rails — Ops-Core FAST, ACH, MICH and equivalents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eHeadset compatibility\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSee the FAQ — Earmor's own sources disagree\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSupplied as\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eA pair, with fasteners\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eAdjustment\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eRotary panel, 90 degrees to stow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eConstruction\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003ePolymer, with a steel guide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eRetailers publish 51 g, 66 g and 80 g. Earmor publish none — see the FAQ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eManufacturer part number\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eM11-1(EARMOR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eEarmor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhich headsets does it fit?\u003c\/strong\u003e Earmor's 2026 catalogue lists M11, M12 and M13 as the helmet kits for the M33. Earmor's own shops describe the M11 as replacing the headband on an M31 or M32. We are not going to pick one on your behalf — photograph the boss where the headband arm enters your cup and ask us if you are unsure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are three different weights listed?\u003c\/strong\u003e Because three retailers publish three figures and Earmor publish none. None of them says whether it is per adapter or per pair, either. We have listed all three rather than choosing the one that sounds best.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes my helmet have ARC rails?\u003c\/strong\u003e If the side rails take a standard accessory shoe and the helmet is a FAST, ACH or MICH pattern, almost certainly. M-LOK rails are a different shape — that is the \u003ca href=\"\/products\/earmor-m13-m-lok-helmet-rail-adapter\" style=\"color:#1B3A6B;\"\u003eM13\u003c\/a\u003e. Team Wendy EXFIL rails are a third standard again, covered by Earmor's M12, which we do not currently stock.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it fit 3M Peltor cups?\u003c\/strong\u003e Not this version. Earmor make a Peltor-cut kit under its own part code — that is the \u003ca href=\"\/products\/earmor-m11-arc-helmet-rail-adapter-3m-peltor\" style=\"color:#1B3A6B;\"\u003eM11 for 3M Peltor\u003c\/a\u003e, and they are not interchangeable.\u003c\/p\u003e\n\u003cdiv style=\"background:#fffbe6;border-left:4px solid #f0d060;padding:12px 16px;border-radius:0 6px 6px 0;margin:0 0 16px;font-size:13px;\"\u003e\n⚠ \u003cstrong\u003eA rail mount changes where the seal sits.\u003c\/strong\u003e Cups that sealed perfectly on a headband can leak on a helmet if the arms are set too short. Adjust with the helmet on, not on the bench.\n\u003c\/div\u003e\n\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 Fit the mounts before you buy a second headset. Most people who think they need in-ear protection for helmet use actually just need the right rail kit. The range is in \u003ca href=\"\/collections\/ear-protection\" style=\"color:#cdd6f4;\"\u003eear protection\u003c\/a\u003e.\n\u003c\/div\u003e","brand":"Earmor","offers":[{"title":"Default Title","offer_id":55664075866488,"sku":"64034542","price":17.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/EarmorM11ARCRailAdapter_TitanForgeAirsoft-1.webp?v=1789735243","url":"https:\/\/www.titanforgeairsoft.com\/products\/earmor-m11-arc-helmet-rail-adapter","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}