{"product_id":"action-army-vsr-10-upgrade-spring","title":"Action Army VSR-10 Upgrade Spring","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;\"\u003eAction Army VSR-10 Upgrade Spring — four ratings of the same part, now under one listing.\u003c\/strong\u003e M120 through M170, each at the same price, for the Marui VSR-10 and the many rifles built on that pattern.\n\u003c\/div\u003e\u003cp\u003eA bolt action is tuned with its spring more than with anything else, and the rating is effectively the whole specification. A higher number means a stiffer coil, more stored energy behind the piston, and a harder push on the BB. Everything else in the rifle then has to cope with it.\u003c\/p\u003e\u003cp\u003eAction Army produce this family for the Tokyo Marui VSR-10 and VSR-10 based clones, which covers most of the budget bolt actions sold in the UK. Choosing between the ratings is the only decision here, because the fitment and the build are identical across all four.\u003c\/p\u003e\u003cp\u003ePick by the limit you have to shoot to, not by the biggest number on the list. The M120 is the rating most UK sites will chrono without argument; the heavier ratings assume a dedicated bolt action limit, a minimum engagement distance, and internals built to survive the load.\u003c\/p\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eSpecifications\u003c\/h2\u003e\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;\"\u003eRatings offered\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eM120, M130, M150, M170\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eFitment\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eTokyo Marui VSR-10 and VSR-10 based clones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eAction Army\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eManufacturer codes\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eM120 B01-036, M130 B01-014, M150 B01-009, M170 B01-005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eInstallation\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eDirect replacement in the standard cylinder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eFree length and wire gauge\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eNot published by the manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eResulting velocity\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eNot published; set by cylinder volume, air seal, barrel and BB weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eGood to know before you buy\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eChrono it before the game, never at it.\u003c\/strong\u003e Most UK sites run a separate single-shot limit for bolt actions alongside a minimum engagement distance. Anything above the M120 is likely to need that classification, so confirm the rule with your marshal and then fit the spring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNo velocity figure is honest in isolation.\u003c\/strong\u003e Two rifles on the same spring can chrono a long way apart depending on cylinder volume, how well the head seals, barrel length and the weight of ammunition. Tell us what you are running and we will give you a realistic bracket instead of a number off a box.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eUpgrade the trigger group alongside, not afterwards.\u003c\/strong\u003e The factory sears are cut for the factory spring, and sear engagement is what gives up first under a heavy one. The matching parts sit in \u003ca href=\"\/collections\/gearbox-parts\" style=\"color:#1B3A6B;\"\u003eour internals section\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe M170 is the odd one out.\u003c\/strong\u003e We can no longer get it and we are not replacing it, so the rating stays on the listing for reference rather than as something we expect to ship.\u003c\/p\u003e\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\u003eNever dry fire a heavily sprung bolt action.\u003c\/strong\u003e With no round to absorb the energy, the piston lands hard against the cylinder head and the shock travels straight back through the sears. The occasional one is survivable; a habit of it is not.\n\u003c\/div\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhich rating should I choose?\u003c\/strong\u003e\u003cbr\u003eWork backwards from your site’s bolt action limit and the BB weight you intend to shoot. The M120 suits most UK skirmish rules; the heavier ratings assume a sniper classification and a rifle built to take them.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat will it chrono at?\u003c\/strong\u003e\u003cbr\u003eThere is no fixed answer, which is why none is printed here. The same spring behaves differently across cylinder volumes, seals, barrels and BB weights, and no figure is quoted anywhere.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it fit a clone rather than a genuine Marui?\u003c\/strong\u003e\u003cbr\u003eAction Army specify the VSR-10 and VSR-10 based clones, which takes in most of the pattern. If your rifle is an unusual one, ask us before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need anything else to fit it?\u003c\/strong\u003e\u003cbr\u003eA spring guide makes reassembly far easier, and a heavier rating is worth pairing with a steel sear set. Neither is strictly required to get the spring in.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is the M170 described differently?\u003c\/strong\u003e\u003cbr\u003eBecause we can no longer get it and we are not replacing it. The other three ratings come in on normal supply; the M170 is listed for reference only.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this the same spring sold as four separate listings before?\u003c\/strong\u003e\u003cbr\u003eYes. We folded the four ratings into one listing so the whole ladder is visible in one place rather than scattered across the catalogue.\u003c\/p\u003e\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 Buy the spring and the BB weight as one decision. A heavy rating pushing a light BB is loud, wild and usually over the limit; the same spring behind a heavier round is the entire point. The rest of the platform sits in \u003ca href=\"\/collections\/sniper-rifles\" style=\"color:#cdd6f4;\"\u003eour sniper rifles section\u003c\/a\u003e.\n\u003c\/div\u003e","brand":"Action Army","offers":[{"title":"M120","offer_id":55739601715576,"sku":null,"price":14.95,"currency_code":"GBP","in_stock":true},{"title":"M130","offer_id":55739601617272,"sku":null,"price":14.95,"currency_code":"GBP","in_stock":true},{"title":"M150","offer_id":55739601650040,"sku":null,"price":14.95,"currency_code":"GBP","in_stock":true},{"title":"M170","offer_id":55739601682808,"sku":null,"price":14.95,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/ActionArmyVSR-10M120Spring_TitanForgeAirsoft.webp?v=1794612941","url":"https:\/\/www.titanforgeairsoft.com\/products\/action-army-vsr-10-upgrade-spring","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}