{"product_id":"tokyo-marui-hi-capa-part-51s-3-stainless-bbu-blow-back-unit","title":"Tokyo Marui Hi-Capa - Replacement Part 51S-3 - BBU Blow Back Unit (5.1 Stainless)","description":"\u003cp\u003eGenuine Tokyo Marui replacement \u003cstrong\u003eblowback unit (51S-3)\u003c\/strong\u003e for the Tokyo Marui Hi-Capa 5.1 Stainless gas blowback pistol.\u003c\/p\u003e\n\u003cp\u003eThe 5.1 Stainless model's blowback unit housing, which sits in the rear of the slide and drives the cycle. A cracked unit shows up as weak slide travel and gas loss on every shot. The housing only: the piston head (H43-27), its seal (H43-26) and the piston part (H51-15) are separate numbers. It is held in the slide by the \u003ca href=\"\/products\/tokyo-marui-hi-capa-part-51s-2-stainless-bbu-rear-mounting-screw\"\u003eBBU rear mounting screw (51S-2)\u003c\/a\u003e, sold separately.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e Tokyo Marui Hi-Capa 5.1 Stainless. Many of its parts are shared with the 5.1 Government Model, but the 51S numbers are its own. Hi-Capa parts are often shared with clone pistols from other brands, but not always — check the part number against your parts diagram before ordering.\u003c\/p\u003e\n\u003cp\u003eTaken from new disassembled pistols, so parts may carry small marks or minor defects but are unused. Supplied in plain packaging.\u003c\/p\u003e","brand":"Tokyo Marui","offers":[{"title":"Default Title","offer_id":57562819232119,"sku":"TM-HC-51S-3","price":13.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0275\/4985\/9893\/files\/tm-hi-capa-5-1-stainless-51s-3-bbu-blowback-unit-diagram.jpg?v=1792145593","url":"https:\/\/www.ebog-designs.co.uk\/products\/tokyo-marui-hi-capa-part-51s-3-stainless-bbu-blow-back-unit","provider":"Ebog Designs","version":"1.0","type":"link"}