{"title":"California Compliant Firearms \u0026 Parts","description":"\u003ch2\u003eCalifornia Compliant MP5 Parts and Firearms\u003c\/h2\u003e\n\u003cp\u003eShopping for a California compliant MP5, a CA legal fixed-mag MP5, or a drop-in fixed magazine for an SP5, AP5, or ZF-5? Hogoholics stocks Radiata Inc compliance parts and complete Radiata fixed-mag MP5 firearms. If you searched Radiata, Radiata Inc, Radiata Fretensis, CA compliant MP5, or MP5 fixed magazine, this is the Radiata lineup we carry.\u003c\/p\u003e\n\u003cp\u003eRadiata Inc builds the Fretensis fixed-magazine trigger housing for roller-delayed MP5-pattern guns. The magazine cannot be removed while the housing is locked to the firearm. Press the release, hinge the housing, and the magazine comes out. It is built for HK SP5, MKE AP5, Zenith ZF-5, MAC, PTR, and other MP5 and MP5K clones, including legacy large-shelf models.\u003c\/p\u003e\n\n\u003ch2\u003eRadiata Inc Products in This Category\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRadiata Inc Fretensis\u003c\/strong\u003e — drop-in fixed magazine housing for a California compliant MP5 or MP5K clone. Patent-pending redundant lock, polymer and steel construction, sold complete so you are not assembling a compliance kit. Foundation, Performance, and Apex tiers cover a 3.5 lb single-stage trigger, a Radiata 2-stage trigger with Blackout Defense safeties, and a Geissele SSA-E with Forward Controls Q-50 selectors. Search Radiata Fretensis, Fretensis Apex, Fretensis Foundation, or Radiata fixed mag lower and the matching product is here.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRadiata Inc fixed-mag MP5\u003c\/strong\u003e — complete California compliant MP5 configured with a fixed magazine from the factory. Built for buyers who want a CA legal MP5 without sourcing a clone and a separate mag-lock housing. Confirm the exact host, barrel length, and overall length on the product page before you order. California also restricts centerfire rifles under 30 inches and bans some HK models by name.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFixed Mag MP5, Not a Featureless Build\u003c\/h2\u003e\n\u003cp\u003eA California compliant MP5 in this category uses a fixed magazine. The feeding device cannot be removed without disassembling the firearm action. That is a different path from a featureless rifle. Radiata Fretensis is the housing that does that job on an MP5-pattern gun, and it is the part most people mean when they search CA compliant MP5 lower, MP5 mag lock, or SP5 fixed magazine.\u003c\/p\u003e\n\u003cp\u003eThese products are sold for lawful use. Hogoholics does not give legal advice, and California DOJ does not issue approval letters for most fixed-mag devices. You are responsible for the final configuration under state and local law. Laws change. Verify before you transfer.\u003c\/p\u003e","products":[{"product_id":"radiata-fretensis-sp5-foundation","title":"Radiata Inc. Fretensis Foundation – MP5 \/ SP5 Fixed Magazine Drop-In Solution","description":"\u003cp dir=\"auto\"\u003eThe \u003cstrong\u003eFretensis Foundation\u003c\/strong\u003e by Radiata Inc. is a complete drop in fixed-magazine trigger housing for compact MP5 and SP5 clones. Designed to be an added magazine retention device that will not allow the magazine to be accessed while the trigger mechanism is connected to the firearm.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eOne press of the discreet button ergonomically disconnects the trigger housing.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eFretensis Tier Comparison\u003c\/strong\u003e All models feature the patent-pending redundant locking system and polymer + steel hybrid construction.\u003c\/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoundation\u003c\/strong\u003e – 3.5 lb flat-faced NiBo single-stage trigger + buffer (full-size). Best value for solid, dependable performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance\u003c\/strong\u003e – Radiata 2-stage battle trigger (4 lb total) + Blackout Defense 45° ambi safeties + buffer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApex\u003c\/strong\u003e – Geissele SSA-E trigger (2.9–3.8 lb) + FCD Q-50 safety with custom levers + buffer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eImportant Compliance \u0026amp; Legal Information\u003c\/strong\u003e Buyer is solely responsible for understanding and complying with all federal, state, and local laws. Laws change — always verify with your states DOJ or a qualified attorney. This is not legal advice. For lawful use only.\u003c\/p\u003e","brand":"Hogoholics","offers":[{"title":"AP5","offer_id":41609447571589,"sku":"fret-f-ap5k-fm","price":450.0,"currency_code":"USD","in_stock":true},{"title":"SP5","offer_id":41609447604357,"sku":"fret-f-sp5k-fm","price":450.0,"currency_code":"USD","in_stock":true},{"title":"MAC5","offer_id":41609447637125,"sku":"fret-f-mac5k-fm","price":450.0,"currency_code":"USD","in_stock":true},{"title":"Zenith (MKE)","offer_id":41609447669893,"sku":"fret-f-zenithk-mke-fm","price":450.0,"currency_code":"USD","in_stock":true},{"title":"Zenith","offer_id":41609447702661,"sku":"fret-f-zenithk-fm","price":450.0,"currency_code":"USD","in_stock":true},{"title":"PTR","offer_id":41609447735429,"sku":"fret-f-ptrk-fm","price":450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2999\/1056\/files\/radiata-fretensis-mp5-fixed-magazine-trigger-pack-california-compliant.jpg?v=1777495003"},{"product_id":"radiata-inc-fretensis-mp5-fixed-magazine-drop-in-solution-california-compliant-copy","title":"Radiata Inc. Fretensis Foundation – MP5K \/ SP5K Fixed Magazine Drop-In Solution","description":"\u003cp dir=\"auto\"\u003eThe \u003cstrong\u003eFretensis Foundation\u003c\/strong\u003e by Radiata Inc. is a complete drop in fixed-magazine trigger housing for compact MP5K and SP5K clones. Designed to be an added magazine retention device that will not allow the magazine to be accessed while the trigger mechanism is connected to the firearm.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eOne press of the discreet button ergonomically disconnects the trigger housing.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eFretensis Tier Comparison\u003c\/strong\u003e All models feature the patent-pending redundant locking system and polymer + steel hybrid construction.\u003c\/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoundation\u003c\/strong\u003e – 3.5 lb flat-faced NiBo single-stage trigger + buffer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance\u003c\/strong\u003e – Radiata 2-stage battle trigger (4 lb total) + Blackout Defense 45° ambi safeties + buffer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApex\u003c\/strong\u003e – Geissele SSA-E trigger (2.9–3.8 lb) + FCD Q-50 safety with custom levers + buffer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eImportant Compliance \u0026amp; Legal Information \u003c\/strong\u003eBuyer is solely responsible for understanding and complying with all federal, state, and local laws. Laws change — always verify with your states DOJ or a qualified attorney. This is not legal advice. For lawful use only.\u003c\/p\u003e","brand":"Hogoholics","offers":[{"title":"AP5k","offer_id":41609451929733,"sku":"fret-f-ap5k-fm","price":495.0,"currency_code":"USD","in_stock":true},{"title":"SP5k","offer_id":41609451962501,"sku":"fret-f-sp5k-fm","price":495.0,"currency_code":"USD","in_stock":true},{"title":"MAC5k","offer_id":41609451995269,"sku":"fret-f-mac5k-fm","price":495.0,"currency_code":"USD","in_stock":true},{"title":"Zenith k (MKE)","offer_id":41609452028037,"sku":"fret-f-zenithk-mke-fm","price":495.0,"currency_code":"USD","in_stock":true},{"title":"Zenith k","offer_id":41609452060805,"sku":"fret-f-zenithk-fm","price":495.0,"currency_code":"USD","in_stock":true},{"title":"PTR k","offer_id":41609452093573,"sku":"fret-f-ptrk-fm","price":495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2999\/1056\/files\/897AB559-31FA-4813-9A81-7614516EC00E.jpg?v=1777500090"},{"product_id":"radiata-inc-fretensis-performance-mp5-sp5-fixed-magazine-drop-in-solution-california-compliant","title":"Radiata Inc. Fretensis Performance – MP5 \/ SP5 Fixed Magazine Drop-In Solution","description":"\u003cp dir=\"auto\"\u003eThe \u003cstrong\u003eFretensis Foundation\u003c\/strong\u003e by Radiata Inc. is a complete drop in fixed-magazine trigger housing for compact MP5 and SP5 clones. Designed to be an added magazine retention device that will not allow the magazine to be accessed while the trigger mechanism is connected to the firearm.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eOne press of the discreet button ergonomically disconnects the trigger housing.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eFretensis Tier Comparison\u003c\/strong\u003e All models feature the patent-pending redundant locking system and polymer + steel hybrid construction.\u003c\/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoundation\u003c\/strong\u003e – 3.5 lb flat-faced NiBo single-stage trigger + buffer (full-size).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance\u003c\/strong\u003e – Radiata 2-stage battle trigger (4 lb total: 2 lb first stage, 2 lb second) + Blackout Defense 45° ambidextrous safeties + buffer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApex\u003c\/strong\u003e – Geissele SSA-E trigger (2.9–3.8 lb) + FCD Q-50 safety with custom levers + buffer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eImportant Compliance \u0026amp; Legal Information\u003c\/strong\u003e Buyer is solely responsible for understanding and complying with all federal, state, and local laws. Laws change — always verify with your states DOJ or a qualified attorney. This is not legal advice. For lawful use only.\u003c\/p\u003e","brand":"Hogoholics","offers":[{"title":"AP5","offer_id":41609456386181,"sku":"fret-p-ap5k-fm","price":600.0,"currency_code":"USD","in_stock":true},{"title":"SP5","offer_id":41609456418949,"sku":"fret-p-sp5k-fm","price":600.0,"currency_code":"USD","in_stock":true},{"title":"MAC5","offer_id":41609456451717,"sku":"fret-p-mac5k-fm","price":600.0,"currency_code":"USD","in_stock":true},{"title":"Zenith (MKE)","offer_id":41609456484485,"sku":"fret-p-zenithk-mke-fm","price":600.0,"currency_code":"USD","in_stock":true},{"title":"Zenith","offer_id":41609456517253,"sku":"fret-p-zenithk-fm","price":600.0,"currency_code":"USD","in_stock":true},{"title":"PTR","offer_id":41609456550021,"sku":"fret-p-ptrk-fm","price":600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2999\/1056\/files\/7AF7098E-AC55-48AE-8B92-AA0B2036CD44.jpg?v=1777499953"},{"product_id":"radiata-inc-fretensis-apex-mp5-sp5-fixed-magazine-drop-in-solution-california-compliant","title":"Radiata Inc. Fretensis Apex – MP5 \/ SP5 Fixed Magazine Drop-In Solution","description":"\u003cp dir=\"auto\"\u003eThe \u003cstrong\u003eFretensis Foundation\u003c\/strong\u003e by Radiata Inc. is a complete drop in fixed-magazine trigger housing for compact MP5 and SP5 clones. Designed to be an added magazine retention device that will not allow the magazine to be accessed while the trigger mechanism is connected to the firearm.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eOne press of the discreet button ergonomically disconnects the trigger housing.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eFretensis Tier Comparison\u003c\/strong\u003e All models feature the patent-pending redundant locking system and polymer + steel hybrid construction.\u003c\/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoundation\u003c\/strong\u003e – 3.5 lb flat-faced NiBo single-stage trigger + buffer (full-size).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance\u003c\/strong\u003e – Radiata 2-stage battle trigger (4 lb total) + Blackout Defense 45° ambi safeties + buffer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApex\u003c\/strong\u003e – Geissele SSA-E trigger (2.9–3.8 lb total) + FCD Q-50 safety with custom levers + buffer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eImportant Compliance \u0026amp; Legal Information\u003c\/strong\u003e Buyer is solely responsible for understanding and complying with all federal, state, and local laws. Laws change — always verify with your states DOJ or a qualified attorney. This is not legal advice. For lawful use only.\u003c\/p\u003e","brand":"Hogoholics","offers":[{"title":"AP5","offer_id":41609456779397,"sku":"frent-a-ap5k-fm","price":925.0,"currency_code":"USD","in_stock":true},{"title":"SP5","offer_id":41609456812165,"sku":"frent-a-sp5k-fm","price":925.0,"currency_code":"USD","in_stock":true},{"title":"MAC5","offer_id":41609456844933,"sku":"frent-a-mac5k-fm","price":925.0,"currency_code":"USD","in_stock":true},{"title":"Zenith (MKE)","offer_id":41609456877701,"sku":"frent-a-zenithk-mke-fm","price":925.0,"currency_code":"USD","in_stock":true},{"title":"Zenith","offer_id":41609456910469,"sku":"frent-a-zenithk-fm","price":925.0,"currency_code":"USD","in_stock":true},{"title":"PTR","offer_id":41609456943237,"sku":"frent-a-ptrk-fm","price":925.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2999\/1056\/files\/radiata-fretensis-mp5-fixed-magazine-trigger-pack-california-compliant.jpg?v=1777495003"},{"product_id":"radiata-inc-fretensis-performance-mp5k-sp5k-fixed-magazine-drop-in-solution-california-compliant","title":"Radiata Inc. Fretensis Performance – MP5K \/ SP5K Fixed Magazine Drop-In Solution","description":"\u003cp dir=\"auto\"\u003eThe \u003cstrong\u003eFretensis Foundation\u003c\/strong\u003e by Radiata Inc. is a complete drop in fixed-magazine trigger housing for compact MP5K and SP5K clones. Designed to be an added magazine retention device that will not allow the magazine to be accessed while the trigger mechanism is connected to the firearm.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eOne press of the discreet button ergonomically disconnects the trigger housing.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eFretensis Tier Comparison\u003c\/strong\u003e All models feature the patent-pending redundant locking system and polymer + steel hybrid construction.\u003c\/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoundation\u003c\/strong\u003e – 3.5 lb flat-faced NiBo single-stage trigger + buffer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance\u003c\/strong\u003e – Radiata 2-stage battle trigger (4 lb total: 2 lb first, 2 lb second) + Blackout Defense 45° ambidextrous safeties + buffer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApex\u003c\/strong\u003e – Geissele SSA-E trigger (2.9–3.8 lb) + FCD Q-50 safety with custom levers + buffer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eImportant Compliance \u0026amp; Legal Information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eBuyer is solely responsible for understanding and complying with all federal, state, and local laws. Laws change — always verify with your states DOJ or a qualified attorney. This is not legal advice. For lawful use only.\u003c\/p\u003e","brand":"Hogoholics","offers":[{"title":"AP5k","offer_id":41609457860741,"sku":"frent-p-ap5k-fm","price":600.0,"currency_code":"USD","in_stock":true},{"title":"SP5k","offer_id":41609457893509,"sku":"frent-p-sp5k-fm","price":600.0,"currency_code":"USD","in_stock":true},{"title":"MAC5k","offer_id":41609457926277,"sku":"frent-p-mac5k-fm","price":600.0,"currency_code":"USD","in_stock":true},{"title":"Zenith k (MKE)","offer_id":41609457959045,"sku":"frent-p-zenithk-mke-fm","price":600.0,"currency_code":"USD","in_stock":true},{"title":"Zenith k","offer_id":41609457991813,"sku":"frent-p-zenithk-fm","price":600.0,"currency_code":"USD","in_stock":true},{"title":"PTR k","offer_id":41609458024581,"sku":"frent-p-ptrk-fm","price":600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2999\/1056\/files\/7AF7098E-AC55-48AE-8B92-AA0B2036CD44.jpg?v=1777499953"},{"product_id":"radiata-inc-fretensis-apex-mp5k-sp5k-fixed-magazine-drop-in-solution-california-compliant","title":"Radiata Inc. Fretensis Apex – MP5K \/ SP5K Fixed Magazine Drop-In Solution","description":"\u003cp dir=\"auto\"\u003eThe \u003cstrong\u003eFretensis Foundation\u003c\/strong\u003e by Radiata Inc. is a complete drop in fixed-magazine trigger housing for compact MP5k and SP5k clones. Designed to be an added magazine retention device that will not allow the magazine to be accessed while the trigger mechanism is connected to the firearm.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eOne press of the discreet button ergonomically disconnects the trigger housing.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eFretensis Tier Comparison\u003c\/strong\u003e All models feature the patent-pending redundant locking system and polymer + steel hybrid construction.\u003c\/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoundation\u003c\/strong\u003e – 3.5 lb flat-faced NiBo single-stage trigger + buffer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance\u003c\/strong\u003e – Radiata 2-stage battle trigger (4 lb total) + Blackout Defense 45° ambi safeties + buffer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApex\u003c\/strong\u003e – Geissele SSA-E trigger (2.9–3.8 lb total) + FCD Q-50 safety with custom levers + buffer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eImportant Compliance \u0026amp; Legal Information: \u003c\/strong\u003eBuyer is solely responsible for understanding and complying with all federal, state, and local laws. Laws change — always verify with your states DOJ or a qualified attorney. This is not legal advice. For lawful use only.\u003c\/p\u003e","brand":"Hogoholics","offers":[{"title":"AP5k","offer_id":41609458057349,"sku":"frent-a-ap5k-fm","price":925.0,"currency_code":"USD","in_stock":true},{"title":"SP5k","offer_id":41609458090117,"sku":"frent-a-sp5k-fm","price":925.0,"currency_code":"USD","in_stock":true},{"title":"MAC5k","offer_id":41609458122885,"sku":"frent-a-mac5k-fm","price":925.0,"currency_code":"USD","in_stock":true},{"title":"Zenith k (MKE)","offer_id":41609458155653,"sku":"frent-a-zenithk-mke-fm","price":925.0,"currency_code":"USD","in_stock":true},{"title":"Zenith k","offer_id":41609458188421,"sku":"frent-a-zenithk-fm","price":925.0,"currency_code":"USD","in_stock":true},{"title":"PTR k","offer_id":41609458221189,"sku":"frent-a-ptrk-fm","price":925.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2999\/1056\/files\/radiata-fretensis-mp5k-lower-fixed-magazine-installed.jpg?v=1777495119"}],"url":"https:\/\/hogoholics.co\/collections\/california-compliant.oembed","provider":"Hogoholics","version":"1.0","type":"link"}