California Compliant Firearms & Parts

California Compliant MP5 Parts and Firearms

Shopping 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.

Radiata 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.

Radiata Inc Products in This Category

  • Radiata Inc Fretensis — 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.
  • Radiata Inc fixed-mag MP5 — 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.

Fixed Mag MP5, Not a Featureless Build

A 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.

These 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.