{"product_id":"atl391","title":"Atlas HO Code 100 #4 Customline Mark V Turnout – Left – ATL391","description":"\u003cp\u003e\u003cstrong\u003eAtlas HO Code 100 #4 Customline Mark V Turnout – Left – ATL391\u003c\/strong\u003e is a modernized left-hand HO scale turnout featuring Atlas' newer \u003cstrong\u003e390 Series Mark V design\u003c\/strong\u003e. Built on the long-running Atlas Code 100 track system, this #4 turnout combines compact switching geometry with upgraded detailing, improved electrical features and compatibility with previous-generation Atlas Customline turnouts.\u003c\/p\u003e\n\n\u003cp\u003eThe Mark V design features a \u003cstrong\u003eDCC-friendly configuration, blackened metal frog, rivetless switch points, cast-metal points and frog, separately molded guardrails and a dedicated frog contact lug\u003c\/strong\u003e. Atlas designed the 390 Series to remain fully compatible with the previous 280 Series Mark IV turnouts, allowing model railroaders to use ATL391 for new trackwork or as a drop-in upgrade for an older equivalent turnout.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Is a #4 Turnout?\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e#4 designation describes the turnout's frog geometry\u003c\/strong\u003e. Compared with broader #6 or #8 turnouts, a #4 turnout creates a more compact diverging route and requires less layout space.\u003c\/p\u003e\n\n\u003cp\u003eThis compact geometry makes #4 turnouts particularly useful for \u003cstrong\u003eyards, industrial sidings, switching districts, storage tracks and other locations where fitting more track into limited space is important\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eBecause #4 geometry is tighter than higher-number turnouts, modelers operating long locomotives, passenger cars or other large equipment should consider the manufacturer's trackwork and minimum-radius recommendations when planning their layout.\u003c\/p\u003e\n\n\u003ch3\u003eLeft-Hand Turnout\u003c\/h3\u003e\n\n\u003cp\u003eATL391 is a \u003cstrong\u003eleft-hand turnout\u003c\/strong\u003e. When approaching from the single-track or point end, the straight route continues ahead while the diverging route branches toward the left.\u003c\/p\u003e\n\n\u003cp\u003eThis makes the turnout useful anywhere a siding, yard track, industrial spur or secondary route needs to branch toward the left from the primary route.\u003c\/p\u003e\n\n\u003ch3\u003eNew Atlas Mark V Turnout Design\u003c\/h3\u003e\n\n\u003cp\u003eThe Atlas 390 Series Mark V turnouts update the company's established HO Code 100 Customline turnout system with improved appearance and electrical features while maintaining compatibility with previous trackwork.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eDCC-friendly turnout design\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBlackened metal frog\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRivetless switch points\u003c\/strong\u003e for improved appearance and electrical conductivity\u003c\/li\u003e\n\u003cli\u003eCast-metal switch points and frog\u003c\/li\u003e\n\u003cli\u003eSeparately molded guardrails for improved realism\u003c\/li\u003e\n\u003cli\u003eDark-colored guardrails and scale-size throwbar\u003c\/li\u003e\n\u003cli\u003eMore realistic scale-size spike head detailing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrog contact lug\u003c\/strong\u003e for easier powered-frog wiring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePowerable Metal Frog\u003c\/h3\u003e\n\n\u003cp\u003eThe Mark V turnout incorporates a \u003cstrong\u003emetal frog that can be powered when desired\u003c\/strong\u003e. Atlas added a dedicated frog contact lug to make connecting power to the frog easier than on previous designs.\u003c\/p\u003e\n\n\u003cp\u003ePowering the frog can help provide continuous electrical pickup through the turnout, particularly for locomotives with short wheelbases or limited electrical pickup. The appropriate wiring arrangement will depend on the layout's electrical and turnout-control system.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible with Atlas Mark IV Turnouts\u003c\/h3\u003e\n\n\u003cp\u003eOne of the most useful features of the 390 Series is backward compatibility. Atlas designed these Mark V turnouts to be \u003cstrong\u003e100% compatible with the corresponding 280 Series Mark IV turnouts\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThis allows existing Atlas Code 100 layouts to be upgraded without redesigning the surrounding track geometry. Modelers replacing an older equivalent Mark IV turnout can use the newer Mark V version as a drop-in replacement while gaining the updated detailing and electrical features.\u003c\/p\u003e\n\n\u003ch3\u003eAtlas HO Code 100 #4 Mark V Left Turnout Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eHO Scale model railroad turnout\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e#4 turnout geometry\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eLeft-hand configuration\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eAtlas Customline Mark V design\u003c\/li\u003e\n\u003cli\u003e390 Series turnout\u003c\/li\u003e\n\u003cli\u003eDCC-friendly construction\u003c\/li\u003e\n\u003cli\u003eBlackened metal frog\u003c\/li\u003e\n\u003cli\u003eMetal frog can be powered when desired\u003c\/li\u003e\n\u003cli\u003eDedicated frog contact lug\u003c\/li\u003e\n\u003cli\u003eRivetless switch points\u003c\/li\u003e\n\u003cli\u003eCast-metal points and frog\u003c\/li\u003e\n\u003cli\u003eSeparately molded guardrails\u003c\/li\u003e\n\u003cli\u003eScale-size spike head detailing\u003c\/li\u003e\n\u003cli\u003eDark-colored scale-size throwbar\u003c\/li\u003e\n\u003cli\u003eCompatible with corresponding Atlas 280 Series Mark IV turnout geometry\u003c\/li\u003e\n\u003cli\u003eCode 100 nickel silver rail\u003c\/li\u003e\n\u003cli\u003eBlack injection-molded plastic ties\u003c\/li\u003e\n\u003cli\u003eDesigned for Atlas HO Code 100 track systems\u003c\/li\u003e\n\u003cli\u003eAtlas manufacturer item number 0391\u003c\/li\u003e\n\u003cli\u003eFusion Scale Hobbies SKU ATL391\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal for Yards, Sidings \u0026amp; Industrial Track\u003c\/h3\u003e\n\n\u003cp\u003eThe relatively compact #4 geometry makes ATL391 especially useful for areas where space efficiency is important. Yard ladders, industrial switching areas, locomotive facilities, storage tracks and compact sidings can all benefit from the shorter geometry of a #4 turnout.\u003c\/p\u003e\n\n\u003cp\u003eFor visible mainlines or routes regularly handling longer equipment, a broader turnout such as a #6 or #8 may be preferable where sufficient space is available.\u003c\/p\u003e\n\n\u003ch3\u003eManual or Powered Turnout Operation\u003c\/h3\u003e\n\n\u003cp\u003eAtlas specifies that the Mark V turnout can be operated with compatible Atlas \u003cstrong\u003eunder-table, standard remote or standard manual switch machines\u003c\/strong\u003e, giving model railroaders several options for controlling the turnout points.\u003c\/p\u003e\n\n\u003cp\u003eBrowse our \u003ca href=\"\/collections\/atlas-ho-switch-machines\"\u003e\u003cstrong\u003eAtlas HO Switch Machines\u003c\/strong\u003e\u003c\/a\u003e collection for turnout-control components for Atlas HO trackwork.\u003c\/p\u003e\n\n\u003ch3\u003eBuild with Atlas HO Code 100 Turnouts\u003c\/h3\u003e\n\n\u003cp\u003eBrowse our complete \u003ca href=\"\/collections\/atlas-ho-code-100-turnouts-switches\"\u003e\u003cstrong\u003eAtlas HO Code 100 Turnouts \u0026amp; Switches\u003c\/strong\u003e\u003c\/a\u003e collection for additional turnout sizes and configurations for yards, sidings, industrial tracks and mainlines.\u003c\/p\u003e\n\n\u003cp\u003eCombine this turnout with products from our \u003ca href=\"\/collections\/atlas-ho-code-100-track\"\u003e\u003cstrong\u003eAtlas HO Code 100 Track\u003c\/strong\u003e\u003c\/a\u003e collection to build or expand a complete HO scale track system.\u003c\/p\u003e\n\n\u003ch3\u003eComplete Your Trackwork\u003c\/h3\u003e\n\n\u003cp\u003eUse \u003ca href=\"\/collections\/atlas-ho-code-100-flex-track\"\u003e\u003cstrong\u003eAtlas HO Code 100 Flex Track\u003c\/strong\u003e\u003c\/a\u003e for custom track alignment around yards and industrial areas, or combine the turnout with \u003ca href=\"\/collections\/atlas-ho-code-100-straight-track\"\u003e\u003cstrong\u003eAtlas HO Code 100 Straight Track\u003c\/strong\u003e\u003c\/a\u003e and \u003ca href=\"\/collections\/atlas-ho-code-100-curved-track\"\u003e\u003cstrong\u003eAtlas HO Code 100 Curved Track\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eFor rail joiners, terminal connections, track nails and other installation components, browse \u003ca href=\"\/collections\/atlas-ho-track-accessories\"\u003e\u003cstrong\u003eAtlas HO Track Accessories\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eAtlas Code 100 track can also be installed over \u003ca href=\"\/collections\/atlas-ho-cork-roadbed\"\u003e\u003cstrong\u003eAtlas HO Cork Roadbed\u003c\/strong\u003e\u003c\/a\u003e to create a raised track profile and foundation for ballast and finished scenery.\u003c\/p\u003e\n\n\u003ch3\u003eShop HO Scale Model Railroad Track\u003c\/h3\u003e\n\n\u003cp\u003eExplore our complete \u003ca href=\"\/collections\/atlas-ho-scale-track\"\u003e\u003cstrong\u003eAtlas HO Scale Track\u003c\/strong\u003e\u003c\/a\u003e selection or browse \u003ca href=\"\/collections\/model-railroad-track\"\u003e\u003cstrong\u003eModel Railroad Track\u003c\/strong\u003e\u003c\/a\u003e for additional track systems, turnouts and layout-building components.\u003c\/p\u003e\n\n\u003cp\u003eShop additional products from \u003ca href=\"\/collections\/atlas-model-railroad\"\u003e\u003cstrong\u003eAtlas Model Railroad\u003c\/strong\u003e\u003c\/a\u003e and browse \u003ca href=\"\/collections\/atlas-in-stock-products\"\u003e\u003cstrong\u003eAtlas In-Stock Products\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e","brand":"Atlas","offers":[{"title":"Default Title","offer_id":43926738305280,"sku":"ATL391","price":23.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0613\/6453\/5552\/products\/ATL391_FSH.jpg?v=1789105386","url":"https:\/\/fusionscalehobbies.com\/products\/atl391","provider":"Fusion Scale Hobbies","version":"1.0","type":"link"}