{"title":"Mossberg 500 \u0026 590 Parts \u0026 Upgrades","description":"\u003cp\u003eUpgrade your pump-action with our range of \u003cstrong\u003eMossberg 500 and 590 parts\u003c\/strong\u003e at Onyx Armaments. Shop adjustable \u003cstrong\u003eSGA stocks\u003c\/strong\u003e and \u003cstrong\u003eM-LOK forends\u003c\/strong\u003e for the \u003cstrong\u003eMossberg 500, 590 and 590A1\u003c\/strong\u003e — for a better fit, more control and direct accessory mounting.\u003c\/p\u003e\n\u003cp\u003eBuild a more capable defensive or sporting shotgun. Leading brands. £5 tracked UK delivery in 7–10 business days.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExplore more:\u003c\/strong\u003e \u003ca href=\"\/collections\/magpul-shotgun-stocks-forends\"\u003eMagpul Shotgun Stocks \u0026amp; Forends\u003c\/a\u003e, \u003ca href=\"\/collections\/shotgun-forends-handguards\"\u003eShotgun Forends \u0026amp; Handguards\u003c\/a\u003e, or \u003ca href=\"\/collections\/remington-870-parts-upgrades\"\u003eRemington 870 Parts\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"magpul-sga-stock-mossberg-500-590-590a1","title":"Magpul SGA Stock for Mossberg 500\/590\/590A1 12 Gauge Shotguns","description":"\u003cp\u003eThe Magpul SGA is a fixed shotgun stock for Mossberg 500, 590 and 590A1 12-gauge shotguns, replacing the factory stock on standard stock hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe shotgun stock that finally fits — Magpul's SGA transforms how a Mossberg 500-series mounts, points and recoils.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Magpul SGA Stock for Mossberg 500\/590\/590A1 (MAG490) replaces the factory stock with a purpose-engineered design built around adjustable fit. Spacer-based length-of-pull adjustment tailors the stock to your build and your outerwear — shorter for armour or winter kit, longer for slighter frames in shirtsleeves — while the recoil-reducing buttpad takes the sting out of full-power 12-gauge loads.\u003c\/p\u003e\u003cp\u003eThe grip geometry is closer to vertical than a traditional field stock, giving better trigger control and a more natural wrist angle for defensive and working guns. Reinforced polymer construction, optional cheek risers for optics and sling mounting points complete a stock that turns a rattly factory pump into a fitted tool.\u003c\/p\u003e\u003ch3\u003eWhy shooters choose the SGA (Mossberg)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpacer-adjustable length of pull\u003c\/strong\u003e — fit the gun to you, not vice versa\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecoil-reducing buttpad\u003c\/strong\u003e — tames full-power 12-gauge loads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved grip geometry\u003c\/strong\u003e — better trigger control and wrist angle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRiser \u0026amp; sling compatible\u003c\/strong\u003e — supports optics and carry setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour finishes\u003c\/strong\u003e — Black, Flat Dark Earth, Stealth Gray, Orange\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat the SGA fits\u003c\/h3\u003e\u003cp\u003eFits Mossberg 500, 590 and 590A1 12-gauge shotguns, using the shotgun's existing stock mounting arrangement — a straightforward bench job with basic tools. If your gun is a less common variant or has already been altered, get in touch with the model and serial details before ordering. Set the spacers to your length of pull before final torque.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003ctd\u003eMossberg 500, 590 \u0026amp; 590A1 (12 gauge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003eStandard factory stock mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eReinforced polymer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eBlack, Flat Dark Earth, Stealth Gray, Orange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAdjustment\u003c\/th\u003e\n\u003ctd\u003eSpacer-based length of pull\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMagpul Industries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMPN\u003c\/th\u003e\n\u003ctd\u003eMAG490-BLK · MAG490-FDE · MAG490-GRY · MAG490-ORG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eMake the shotgun yours. \u003cstrong\u003eOrder the SGA for Mossberg today\u003c\/strong\u003e — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eExplore more:\u003c\/strong\u003e \u003ca href=\"\/collections\/magpul-shotgun-stocks-forends\"\u003eMagpul Shotgun Stocks \u0026amp; Forends\u003c\/a\u003e, \u003ca href=\"\/collections\/rifle-shotgun-stocks\"\u003eRifle \u0026amp; Shotgun Stocks\u003c\/a\u003e or browse all \u003ca href=\"\/collections\/magpul-industries\"\u003eMagpul\u003c\/a\u003e.\u003c\/p\u003e","brand":"Magpul Industries","offers":[{"title":"Black","offer_id":60873785278798,"sku":"MAG490-BLK","price":129.99,"currency_code":"GBP","in_stock":true},{"title":"Flat Dark Earth","offer_id":60873785311566,"sku":"MAG490-FDE","price":129.99,"currency_code":"GBP","in_stock":true},{"title":"Stealth Gray","offer_id":60873785344334,"sku":"MAG490-GRY","price":129.99,"currency_code":"GBP","in_stock":true},{"title":"Orange","offer_id":60873785377102,"sku":"MAG490-ORG","price":129.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1081\/3223\/7646\/files\/magpul-sga-stock-mossberg-500-590-590a1-black.jpg?v=1789881016"},{"product_id":"magpul-moe-m-lok-forend-mossberg-590-590a1","title":"Magpul MOE M-LOK Forend for Mossberg 590 \u0026 590A1","description":"\u003cp\u003eThe Magpul MOE M-LOK Forend is a replacement pump forend for Mossberg 590 and 590A1 12-gauge shotguns, with M-LOK slots moulded in.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eModern capability for the Mossberg pump — M-LOK slots, hand stops and a grip your support hand can trust.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Magpul MOE M-LOK Forend for Mossberg 590\/590A1 (MAG494) upgrades the most important contact point on a pump shotgun. Integrated M-LOK slots let you mount a weapon light, hand stop or sling point directly to the forend — the correct position for a defensive shotgun — while the aggressive texture and front\/rear hand stops keep the pump stroke positive when hands are wet, cold or gloved.\u003c\/p\u003e\u003cp\u003eMoulded from Magpul's reinforced polymer, the forend adds capability without fragility, and its extended profile improves leverage on the action tube for faster, more decisive cycling. For 590-series guns on duty or by the bed, this is the upgrade that matters most.\u003c\/p\u003e\u003ch3\u003eWhy shooters choose the MOE M-LOK Forend (590)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated M-LOK slots\u003c\/strong\u003e — direct mounting for lights and accessories\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront \u0026amp; rear hand stops\u003c\/strong\u003e — a planted pump hand under recoil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive no-slip texture\u003c\/strong\u003e — control in any conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReinforced polymer shell\u003c\/strong\u003e — duty-grade durability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour finishes\u003c\/strong\u003e — Black, Flat Dark Earth, Stealth Gray, Orange\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat the MOE M-LOK Forend fits\u003c\/h3\u003e\u003cp\u003eA direct replacement for the factory forend on Mossberg 590 and 590A1 12-gauge shotguns. It is not intended for the 500, which uses a different action bar arrangement, so check which model you have before ordering. Factory forend removal needs a forend wrench or a gunsmith; fitting the MOE from there is straightforward, with no permanent alteration to the shotgun.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003ctd\u003eMossberg 590 \u0026amp; 590A1 (12 gauge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003eStandard factory action bar assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eReinforced polymer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eBlack, Flat Dark Earth, Stealth Gray, Orange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMount interface\u003c\/th\u003e\n\u003ctd\u003eIntegrated M-LOK slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMagpul Industries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMPN\u003c\/th\u003e\n\u003ctd\u003eMAG494-BLK · MAG494-FDE · MAG494-GRY · MAG494-ORG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eGive the pump hand its due. \u003cstrong\u003eOrder the MOE M-LOK Forend today\u003c\/strong\u003e — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eExplore more:\u003c\/strong\u003e \u003ca href=\"\/collections\/shotgun-forends-handguards\"\u003eShotgun Forends \u0026amp; Handguards\u003c\/a\u003e, \u003ca href=\"\/collections\/magpul-shotgun-stocks-forends\"\u003eMagpul Shotgun Stocks \u0026amp; Forends\u003c\/a\u003e or browse all \u003ca href=\"\/collections\/magpul-industries\"\u003eMagpul\u003c\/a\u003e.\u003c\/p\u003e","brand":"Magpul Industries","offers":[{"title":"Black","offer_id":60873785442638,"sku":"MAG494-BLK","price":34.99,"currency_code":"GBP","in_stock":true},{"title":"Flat Dark Earth","offer_id":60873785475406,"sku":"MAG494-FDE","price":34.99,"currency_code":"GBP","in_stock":true},{"title":"Stealth Gray","offer_id":60873785508174,"sku":"MAG494-GRY","price":34.99,"currency_code":"GBP","in_stock":true},{"title":"Orange","offer_id":60873785540942,"sku":"MAG494-ORG","price":34.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1081\/3223\/7646\/files\/magpul-moe-m-lok-forend-mossberg-590-590a1-black.jpg?v=1789881017"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1081\/3223\/7646\/collections\/mossberg-500-590-parts-upgrades-banner.png?v=1789937730","url":"https:\/\/onyxarmaments.co.uk\/collections\/mossberg-500-590-parts-upgrades.oembed","provider":"Onyx Armaments","version":"1.0","type":"link"}