{"product_id":"sapien-arms-6-03mm-m4-m4a1-sg551-tightbore-barrel-363mm","title":"Sapien Arms 6.03mm M4 \/ M4A1 \/ SG551 Tightbore Barrel - 363mm","description":"\u003cp\u003eThe Sapien Arms performance 6.03mm series of tightbore barrels are the newest tightbores out on the market. They feature a heavy metal Ni (nickel) coating for high lubricity and performance, and increase performance (power) an average of 15% with installation.\u003cbr\u003e\u003cbr\u003eThe super slick Heavy Metal Nickel Finish strengthens and protects the barrel, while reducing friction (conserves velocity \u0026amp; back spin). This 363mm barrel fits most M4 \/ M4A1 Carbine \/ SG551 metal gearbox AEGs.\u003cbr\u003e\u003cbr\u003ePrecision manufactured in the USA, each barrel is HAND TESTED for tolerance and to ensure quality.\u003cbr\u003e\u003cbr\u003eNote: Ready to use right out of the box, though professional installation is recommended\/may be required. Please use only ultra high-quality precision seamless BBs in your gun after installing this barrel, as inferior grade BBs (i.e. BBs from sporting goods stores) WILL jam inside this barrel.\u003c\/p\u003e\u003cp\u003eIn the Box\u003cbr\u003e\u003cbr\u003eSpecifications:\u003cbr\u003e\u003cbr\u003eCalifornia Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov\u003c\/p\u003e","brand":"Sapien Arms","offers":[{"title":"Default Title","offer_id":53883046199662,"sku":"ACC-SAP12-363MM","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0899\/9524\/7982\/files\/pd-308-300x360-1-480x480.jpg?v=1780815283","url":"https:\/\/store.xtremeairsoft.net\/products\/sapien-arms-6-03mm-m4-m4a1-sg551-tightbore-barrel-363mm","provider":"XTREME Airsoft Superstore","version":"1.0","type":"link"}