{"product_id":"airtac-hyp-ar-hyp-556-mws-receiver-trigger-box-installed-batch-2","title":"Airtac HYP-AR HYP-556 MWS HPA Receiver with Trigger Box Installed — Batch 2","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;\"\u003eAirtac HYP-556 MWS Receiver with Trigger Box Installed, Batch 2 — the earlier cut, arriving as a working lower with its trigger group already fitted.\u003c\/strong\u003e No donor gun to strip and no box to shim before it will cycle.\n\u003c\/div\u003e\u003cp\u003eThe hard part of a HYP-AR build is not the receiver, it is the trigger group. You have to get a box out of a donor MWS without wrecking it, shim it to the right sear height, then drive the pin through without marking the receiver. This version skips all of that: the box, the fire selector and the bolt stop are in, pinned and ready.\u003c\/p\u003e\u003cp\u003eUnderneath it is the same part as the bare lower — 7075 billet, Cerakoted, cut in Northern Ireland, air unit machined inside the receiver, feeding \u003ca href=\"\/collections\/pts\" style=\"color:#1B3A6B;\"\u003ePTS EPM M4 magazines\u003c\/a\u003e with the gun’s own magazine release, bolt catch and selector all still doing their jobs.\u003c\/p\u003e\u003cp\u003eYour donor gun also stays whole. If you were planning to rob its trigger box you would be left with an upper and a shell; this way you keep a complete gun and gain a second lower you can move the upper between.\u003c\/p\u003e\u003cp\u003eThis is the earlier of the two MWS cuts, listed under our supplier’s own Batch 2 label. The later cut is the \u003ca href=\"\/products\/airtac-hyp-ar-hyp-556-mws-hpa-receiver-style-2\" style=\"color:#1B3A6B;\"\u003eStyle 2 receiver\u003c\/a\u003e.\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;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eCNC-machined 7075 aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eCerakote\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eManufactured\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eNorthern Ireland\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;\"\u003eReceiver with the MWS trigger box kit pre-installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eGrip\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eIncluded, as pictured\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eMagazine\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003ePTS EPM M4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eAir fitting\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eUS Foster as standard; EU fittings sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eOperating pressure\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e130–150 psi, per the manufacturer’s assembly guide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eHost platform\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eTokyo Marui MWS or Double Eagle MWS lower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eBuffer tube\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eMWS-spec tubes and any stock that threads onto the buffer tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eReceiver cut\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\u003c\/table\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eGood to know before you buy\u003c\/h2\u003e\u003cp\u003eThe trigger group is in, so on the mechanical side there is nothing else to source. You still bring your own upper, bolt, barrel and stock, and you still need a line, a regulator and a tank to feed it.\u003c\/p\u003e\u003cp\u003eDouble Eagle lowers sit with a visible step where the turret meets the upper half. That is designed in, to swallow the variation between their generations, and there is nothing about it to correct.\u003c\/p\u003e\u003cp\u003eSet pressure for reliable bolt return first and bring muzzle energy down with an NPAS afterwards. The 556 receiver has a small internal volume and wants more pressure than a typical AEG engine.\u003c\/p\u003e\u003cp\u003eOur supplier labels this cut Batch 2 while the manufacturer has moved to Style 1 and Style 2 naming. We have not been able to confirm in writing that the two labels describe the same cut, so ask us before ordering if you are matching an existing build.\u003c\/p\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eHow is this different from the bare receiver?\u003c\/strong\u003e\u003cbr\u003eOnly in what is fitted. \u003ca href=\"\/products\/airtac-hyp-ar-hyp-556-mws-hpa-receiver-style-1\" style=\"color:#1B3A6B;\"\u003eThe receiver on its own\u003c\/a\u003e arrives without a trigger group; this one has the box, fire selector and bolt stop installed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I still need a donor gun?\u003c\/strong\u003e\u003cbr\u003eFor the upper, bolt, barrel and stock, yes. You no longer need to take its trigger box apart, which is the step most builds get stuck on.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich platform should I order?\u003c\/strong\u003e\u003cbr\u003eMatch your gun — Tokyo Marui MWS or Double Eagle MWS. The two lowers are machined differently and are not interchangeable.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I buy the trigger box on its own instead?\u003c\/strong\u003e\u003cbr\u003eYes — \u003ca href=\"\/products\/airtac-mws-trigger-box-kit-for-hyp-ar\" style=\"color:#1B3A6B;\"\u003ethe kit is listed separately\u003c\/a\u003e if you would rather fit it yourself or already have a bare receiver.\u003c\/p\u003e\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\u003eAssembled is not finished.\u003c\/strong\u003e A built lower is still only half a gun. The reading that counts comes off the complete build, so get it chronoed once the upper is on.\n\u003c\/div\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 Want it delivered as a running gun rather than a lower? \u003ca href=\"\/pages\/hpa-tech-service\" style=\"color:#cdd6f4;\"\u003eOur HPA tech service\u003c\/a\u003e will build the upper onto it and test it, and \u003ca href=\"\/pages\/hpa-airsoft-uk-the-complete-guide\" style=\"color:#cdd6f4;\"\u003eour HPA guide\u003c\/a\u003e covers the air side.\n\u003c\/div\u003e","brand":"Airtac","offers":[{"title":"Double Eagle \/ Black","offer_id":55722687037816,"sku":"33556447","price":414.95,"currency_code":"GBP","in_stock":true},{"title":"Double Eagle \/ Tan","offer_id":55722689397112,"sku":null,"price":414.95,"currency_code":"GBP","in_stock":true},{"title":"Tokyo Marui \/ Black","offer_id":55722689429880,"sku":null,"price":414.95,"currency_code":"GBP","in_stock":true},{"title":"Tokyo Marui \/ Tan","offer_id":55722758799736,"sku":null,"price":414.95,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/AirtacHYP-AR556MWSReceiverBuilt_TitanForgeAirsoft-1.webp?v=1793729072","url":"https:\/\/www.titanforgeairsoft.com\/products\/airtac-hyp-ar-hyp-556-mws-receiver-trigger-box-installed-batch-2","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}