{"product_id":"shs-piston-head-silenced-bearing-bore-up","title":"SHS Piston Head — Silenced Bearing, Bore-Up Only","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;\"\u003eSHS Silenced Bore-Up Piston Head with Bearing — the bore-up diameter, ported for a softer stroke.\u003c\/strong\u003e It will not fit a standard cylinder.\n\u003c\/div\u003e\n\u003cp\u003eBore-up cylinders are wider than standard, so they need a piston head cut to that diameter. This is that part, in the silenced pattern.\u003c\/p\u003e\n\u003cp\u003eThe porting gives air a route through the head instead of letting it slam flat against a solid face. That takes some of the crack out of the shot and softens the stop at the end of travel.\u003c\/p\u003e\n\u003cp\u003eA thrust bearing sits behind it so the spring turns rather than winds. None of that counts for anything unless the diameter is right to begin with.\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;\"\u003ePiston head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eBore\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eBore-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eDamping\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003ePorted, silenced pattern\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eBearing\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eYes, thrust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSold as\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSingle piston head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eGood to know before you buy\u003c\/h2\u003e\n\u003cp\u003eBore-up is a cylinder decision, not a piston head one. If you have not already fitted a bore-up cylinder then this is not the head you are looking for.\u003c\/p\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this go into a standard cylinder?\u003c\/strong\u003e \u003cbr\u003eNo. Bore-up heads are a larger diameter and will not enter a standard AEG cylinder at all.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the porting do for the noise?\u003c\/strong\u003e \u003cbr\u003eIt gives the air somewhere to go through the head rather than compressing hard against a solid face, which takes the edge off the report.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a bore-up cylinder head too?\u003c\/strong\u003e \u003cbr\u003eBore-up builds are a matched set. Cylinder, cylinder head and piston head all want to be specified for the same bore.\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\u003eBore-up cylinders only:\u003c\/strong\u003e our supplier is explicit that bore-up piston heads are not compatible with standard AEG cylinders, and forcing one in is how a cylinder gets scored.\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 Measure the cylinder before ordering if the gun arrived already built. Bore-up is not always obvious from the outside. Browse \u003ca href=\"\/collections\/piston-cylinder-heads\" style=\"color:#cdd6f4;\"\u003epistons and piston heads\u003c\/a\u003e.\n\u003c\/div\u003e","brand":"SHS","offers":[{"title":"Default Title","offer_id":55677717971320,"sku":"20577699","price":7.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/SHSSilencedBoreUpPistonHead_TitanForgeAirsoft.webp?v=1790346648","url":"https:\/\/www.titanforgeairsoft.com\/products\/shs-piston-head-silenced-bearing-bore-up","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}