{"product_id":"m4-shell-adapter","title":"M4 Shell Adapter [STL]","description":"\u003cdiv class=\"rich link-container--strong\"\u003e\n\u003cp\u003e\u003cstrong\u003eM4 Shell Adapter — Minimal kit, proper DMR feel.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLightweight shells that hold 30 BBs each for a true low-capacity DMR experience or minimalist loadouts. Compact, low-mass and tuned so you won’t notice them in your pouches.\u003c\/p\u003e\n\u003cp\u003eWhy this one? Reliable BB retention.\u003cbr\u003eA sliding mechanical retention pin holds most BBs in place during reloads so only two drop free — far more consistent and durable than O-rings that creep or fail.\u003c\/p\u003e\n\u003cp\u003eHardware (buy locally):\u003cbr\u003e• BB retention pin: Ø2 mm × 22–24 mm\u003cbr\u003e• Latch pin: Ø1 mm × 10–12 mm (or ~1 mm wire)\u003cbr\u003e• Latch screw: M2.5 × 16 mm\u003cbr\u003e• BB tube screw: M2 × 5 mm\u003cbr\u003e• Springs (2): Ø4.5 mm × 15 mm\u003c\/p\u003e\n\u003cp\u003ePrinting notes — tested: 0.2 mm layers, 20% infill, tighten tolerances on fit parts (±0.1 mm). PETG or PLA+ works fine; scale tolerances if your printer over\/under-extrudes.\u003c\/p\u003e\n\u003cp\u003eNeed help or build advice? Join Quizcen Airsoft on Discord: \u003ca href=\"https:\/\/discord.com\/invite\/XFdMX947JP\"\u003ehttps:\/\/discord.com\/invite\/XFdMX947JP\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eLicense:\u003cbr\u003eYou may 3D print this model for personal use and share photos of your prints online. You may not use it commercially, modify or adapt it, or share, sell, donate, or exchange the digital files or printed models. Please respect this.\u003c\/p\u003e\n\u003cp\u003eUploaded V1.0 — 20\/07\/2025.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDigital delivery: \u003c\/strong\u003e\u003cspan\u003eAfter your payment is confirmed, \u003c\/span\u003e\u003cstrong\u003eyour file will be delivered automatically\u003c\/strong\u003e\u003cspan\u003e. This \u003c\/span\u003e\u003cstrong\u003eusually takes 2–5 minutes\u003c\/strong\u003e\u003cspan\u003e. You’ll then receive an email with a \u003c\/span\u003e\u003cstrong\u003edownload link\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"QUIZCEN","offers":[{"title":"Default Title","offer_id":55727251325276,"sku":null,"price":8.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0961\/3528\/3036\/files\/DSC_6989.webp?v=1769636817","url":"https:\/\/www.quizcen.com\/products\/m4-shell-adapter","provider":"Quizcen","version":"1.0","type":"link"}