Legal & Regulatory Posture

Contents

(Generated by build/inject_toc.py at build time. Section headers below are the source of truth.)

This is the heaviest legal volume in this hub so far. The Sterling SMG donor — across its three legally-distinct US donor flavors plus the Path B / Path C non-firing variants — touches more federal and state legal pivot points than any prior build in this hub. The DL-44 (Mauser C96 donor) is a pistol — different posture. The Sterling is an SMG — categorically different.

This volume is not legal advice. Firearms law is jurisdiction-dependent and changes frequently; the state-of-residence rules override federal-only framings repeatedly throughout. Cite the primary sources (27 CFR, 18 USC, ATF Determination Letters, state statutes) before acting on any specific posture. The hub-wide framing is in ../../_shared/legal_ethics.md; this volume is the build-specific tail-end.

The volume is organized by the legal pivot points an E-11 build can cross, in order of regulatory weight:

1. § 10.1 — Foundation: what’s a firearm, what isn’t.
2. § 10.2 — Path A1 (semi-auto Sterling clone) — Title I rifle posture; state assault-weapon and magazine-capacity rules.
3. § 10.3 — Path A3 (Class III registered transferable) — NFA / Hughes Amendment / Form 4 transfer / state machine-gun rules.
4. § 10.4 — Path A2 (parts-kit / 80% receiver) — 922(r) parts-count compliance.
5. § 10.5 — Paths B / C non-firing — 15 USC § 5001 orange-tip rule and state imitation-firearm laws.
6. § 10.6 — Path C from-scratch — manufacture-for-self posture; semi-auto-only rule.
7. § 10.7 — The constructive-intent trap.
8. § 10.8 — Transport across state lines.
9. § 10.9 — What this volume is not.
10. § 10.10 — References.

10.1 Foundation — what is a firearm in this context

Under 18 USC § 921 and 27 CFR § 478.11, a firearm is defined as “any weapon (including a starter gun) which will or is designed to or may readily be converted to expel a projectile by the action of an explosive” — plus the frame or receiver of any such weapon. The frame or receiver is the legal handle of the firearm; modifying it (or possessing one in certain configurations) triggers the rules.

For E-11 builds:

• Path A1 (Wise Lite / IO semi-auto Sterling clone): a finished semi-auto rifle is a firearm. A US-made Sterling-pattern receiver is the firearm; everything else is parts.
• Path A2 (parts-kit + 80%-receiver): the US-made receiver (when finished to functional) is the firearm. The imported parts-kit components are not firearms (the original imported receiver was demilled).
• Path A3 (Class III registered Sterling): the original Sterling receiver with its NFA registration is the firearm — and an NFA item (machine gun).
• Path B (Doopydoo resin / airsoft / replica): not a firearm under federal law. May be an “imitation firearm” under 15 USC § 5001.
• Path C from-scratch (semi-auto firing): a finished semi-auto rifle is a firearm; the from-scratch receiver is the firearm.
• Path C from-scratch (non-firing): not a firearm; imitation-firearm rules may apply.

Every E-11 build’s legal posture starts here. Know which category your build is in.

10.2 Path A1 — Semi-auto Sterling clone (Title I rifle)

A semi-auto Sterling clone from Wise Lite or Indianapolis Ordnance is a Title I rifle under federal law: a semi-auto 9×19 carbine. Not NFA. Not regulated beyond standard GCA Title I.

10.2.1 Federal posture

• GCA Title I — purchase via FFL transfer; 4473 form; standard background check.
• No NFA registration required.
• No tax stamp.
• No magazine-capacity restriction at federal level — the 34-round Sterling mag is federally legal.
• No state-of-residence pre-approval at federal level (some states have permit-to-purchase requirements that override).

10.2.2 State-level — the load-bearing question

State law overrides federal-only assumptions. Eight states + DC impose substantial restrictions on Sterling-pattern semi-auto rifles:

State	Restriction	E-11 build implication
California	Assault Weapons Control Act (Penal Code § 30515); feature-list bans (folding stock + pistol grip + threaded barrel + detachable mag = AW)	Wise Lite or IO Sterling clone is likely a regulated AW. Likely prohibited for new acquisition unless featureless-compliant build (no folding stock, no detachable mag, etc. — would not be E-11 spec)
New York	SAFE Act (Penal Law § 265.00); feature-list bans, 10-round mag limit	Similar to CA — Sterling clone is likely an AW; mag limit makes 34-rd Sterling mag illegal. Featureless workarounds available but break E-11 spec
New Jersey	Assault Firearms Act (N.J.S.A. § 2C:39-1); feature-list bans; 10-round mag limit	Similar to NY
Massachusetts	Chapter 140 § 121; specific make/model bans + feature-list bans; 10-round mag limit	Sterling-clone availability variable; check specific models
Connecticut	Connecticut General Statutes § 53-202; feature-list bans + post-2013 AW restrictions; 10-round mag limit	Similar to MA
Maryland	Maryland Code § 4-301 etc.; Tier-based restrictions	Sterling-clone status depends on specific list inclusion
Hawaii	Hawaii Revised Statutes § 134; magazine and feature restrictions	Mag limit + feature list affect build
Washington DC	DC Code § 7-2501; semi-auto rifle restrictions	Sterling-clone availability restricted

For builders in any of these jurisdictions: clear with state law before purchase. The build paths that work in Texas / Indiana / Wyoming may not work in California / New York.

10.2.3 Magazine capacity

The Sterling factory mag is 34-round. State limits:

• 10-round limit: CA, CO (purchase only), CT, HI, MA, NJ, NY, VT, WA.
• 15-round limit: DC.
• 20-round limit: OR.
• No limit: most other states.

Path A1 builders in limited states use lower-capacity magazines (10 or 15 round factory or aftermarket); the build still reads as E-11 visually but the magazine is non-canonical.

10.2.4 Permit / license / waiting periods

State-specific:

• Permit to purchase: NJ, MA, IL, MA, NY, others — purchase requires a state permit.
• Waiting period: CA (10 days), DC (10 days), HI (14 days), MD (7 days), RI (7 days), others.
• Universal background check: most states + federal.

Verify state-of-residence requirements at purchase time.

10.3 Path A3 — Class III registered transferable Sterling

A real registered transferable Sterling SMG — registered with ATF before May 19, 1986 — is the most legally-heavy donor in the E-11 builder world.

10.3.1 Federal posture — National Firearms Act

The Sterling SMG in full-auto configuration is a machine gun under 26 USC § 5845(b): a firearm that fires more than one round per trigger pull. NFA machine guns are regulated by 26 USC § 5841 (registration), § 5811 (transfer tax), § 5821 (making tax), § 5861 (prohibited acts).

Key features of NFA machine-gun posture:

• Registration with ATF in the National Firearms Registration and Transfer Record (NFRTR) is mandatory. Any unregistered machine gun is unlawful to possess; possession of an unregistered MG is a federal felony (26 USC § 5861(d)).
• Hughes Amendment (Firearm Owners Protection Act, 1986): machine guns registered before May 19, 1986 can be transferred between qualified civilians; machine guns made or registered after that date cannot be transferred to civilians (only to military / law enforcement / SOT-licensed dealers).
• A transferable Sterling is one that was registered before May 1986 and has a clean chain of title.
• Transfer tax: $200 per transfer under 26 USC § 5811. Paid by the transferee.

10.3.2 ATF Form 4 — the transfer process

To transfer a registered machine gun to an individual (or trust):

1. Buyer and seller agree on transfer. Typical brokerage: Class III dealer mediates.
2. Form 4 (ATF Form 5320.4) — Application for Tax Paid Transfer and Registration of a Firearm.
3. Form 4 submission: seller + buyer + dealer complete the form; buyer pays the $200 transfer tax; buyer provides fingerprints and photographs (or sends them through the dealer).
4. ATF review: 6–12 months for individual transfers (faster — 60–90 days — for trust transfers); ATF runs background and verifies registration chain.
5. Form 4 approval: tax stamp issued; transfer documented in NFRTR.
6. Possession transfer: once stamp is issued, the firearm can be physically transferred.

10.3.3 State-level rules

State law overrides federal on machine guns. Several states completely prohibit civilian machine-gun ownership:

State	Posture
California	Prohibited (some pre-existing registered MGs grandfathered with permits)
New York	Prohibited
New Jersey	Prohibited
Massachusetts	Prohibited
Hawaii	Prohibited
Illinois	Prohibited (some pre-existing registered MGs grandfathered)
Iowa	Prohibited
Kansas	Prohibited
Washington DC	Prohibited
Most other states	Permitted with federal NFA approval; some require state permit / SOT

A Class III Sterling in a prohibited state is not possessible regardless of federal NFA registration. Check state law before any Form 4 transfer.

10.3.4 Trust ownership

NFA trusts have become common for individual NFA collectors. Benefits:

• Faster Form 4 approval (60–90 days vs 6–12 months for individuals).
• Multi-person possession within trust beneficiaries.
• Succession planning — trust survives the trustor.

Trust setup is its own legal process; consult an NFA-specialty attorney.

10.3.5 Build implications for Path A3

A registered transferable Sterling’s value is in its registration. Any modification that obscures the registration tag, alters the receiver markings, or changes the configuration substantially can:

• Affect future resale value.
• In edge cases, affect the registration validity (the firearm is registered as it was configured at last NFA modification).

For an E-11 build on a transferable Sterling:

• Use reversible greeblie mounts (clamp-on, magnet, non-permanent fasteners) where possible.
• Don’t drill new mounting holes through the receiver.
• Don’t refinish the receiver in a way that obscures the registration markings.
• Document modifications for future reference.

Vol 4 § 4.4 covers the build details; this section is the legal-posture context.

10.4 Path A2 — Sterling parts-kit on US-made 80% receiver: 922(r) compliance

A US-made semi-auto rifle assembled from imported parts is regulated by 18 USC § 922(r) and the implementing regulation 27 CFR § 478.39. The rule: a US-made semi-auto rifle assembled from imported parts must contain no more than 10 imported “regulated parts” from the implementing list.

10.4.1 The regulated parts list (27 CFR § 478.39)

The complete list of regulated parts:

1. Frame, receiver, receiver castings, forgings or stampings
2. Barrels
3. Barrel extensions
4. Mounting blocks (trunnions)
5. Muzzle attachments
6. Bolts
7. Bolt carriers
8. Operating rods
9. Gas pistons
10. Trigger housings
11. Triggers
12. Hammers
13. Sears
14. Disconnectors
15. Buttstocks
16. Pistol grips
17. Forearms, hand guards
18. Magazine bodies
19. Followers
20. Floor plates

A US-made semi-auto rifle is in compliance if it contains 10 or fewer imported parts from the above list.

10.4.2 Sterling parts-kit count

A typical Sterling parts-kit + Wise Lite receiver assembly contains:

Part	Source	Count toward limit
Receiver	US-made (Wise Lite)	Not counted
Bolt	Imported (kit)	1
Trigger housing (fire-control housing)	Imported (kit)	1
Trigger	Imported (kit)	1
Hammer	Imported (kit)	1
Sear	Imported (kit)	1
Disconnector	Imported (kit)	1
Buttstock (folding wire stock)	Imported (kit)	1
Pistol grip	Imported (kit)	1
Magazine body	Imported (kit)	1
Magazine follower	Imported (kit)	1
Magazine floorplate	Imported (kit)	1
Subtotal		11 imported parts — over limit by 1

The build is non-compliant as assembled. At least one US-made substitution is needed.

10.4.3 US-made substitutions to achieve compliance

Common approaches:

Substitution A — US-made magazine. Replaces three regulated parts (body + follower + floorplate) at once. Count drops to 8. The cleanest single substitution.

Substitution B — US-made fire-control housing. Replaces one regulated part (trigger housing). Count drops to 10. Requires sourcing a US-made Sterling-pattern housing (Wise Lite has sold these).

Substitution C — US-made trigger / hammer / sear / disconnector set. Replaces four regulated parts. Count drops to 7. The most-conservative substitution; ensures legal buffer.

Substitution D — US-made folding stock + pistol grip. Replaces two regulated parts. Count drops to 9.

Most Path A2 builds use Substitution A (US-made magazine) as the simplest path. The 34-round Sterling magazine is the visible E-11 component, so the substitution should match the canonical silhouette.

10.4.4 Documentation responsibility

The builder is responsible for the 922(r) count and the substitution documentation. ATF does not pre-approve specific builds. Keep records of:

• Each part’s source (imported or US-made).
• Vendor and date of purchase for US-made substitutions.
• Receipts and invoices documenting the substitution.

Store this documentation with the build’s parts_list.md (E-11/builds/parts_kit_build/parts_list.md); it is critical legal documentation that may be requested in any future enforcement action.

10.4.5 Federal posture for a compliant Path A2 build

If 922(r) compliance is satisfied:

• Title I semi-auto rifle. Same as Path A1.
• No NFA registration required.
• Same state-level rules apply (CA / NY / NJ / etc. — see § 10.2.2).

A 922(r)-compliant Path A2 build is legally indistinguishable from a Path A1 Wise Lite clone for ownership and trooping purposes.

10.5 Paths B / C non-firing — orange-tip rule and state imitation-firearm laws

A non-firing E-11 (Doopydoo resin, airsoft Sterling, community 3D-print, deact-shell, Path C non-firing) is not a firearm under federal law. It may be regulated as an imitation firearm under 15 USC § 5001 and various state laws.

10.5.1 Federal — 15 USC § 5001 (Toy Gun Marking Act)

15 USC § 5001 prohibits the manufacture, sale, importation, or shipping in commerce of any “look-alike firearm” — defined as a toy, lookalike, or imitation firearm — without a federally-mandated orange tip (a “permanently affixed blaze orange plug, recessed into the barrel, with a thickness of not less than 6 mm”).

Important: 15 USC § 5001 is a commerce statute. It applies to:

• Manufacturers selling imitation firearms.
• Importers bringing imitation firearms into the US.
• Sellers shipping imitation firearms in interstate commerce.

It does not directly regulate:

• Personal possession of an imitation firearm (after purchase, the orange tip may be removed in many states without violating federal law).
• Personal manufacture of an imitation firearm (a Path C non-firing build is not in commerce).

A finished E-11 build that was purchased with an orange tip and had the orange tip removed is federally lawful to possess (subject to state law). A Path C from-scratch non-firing build manufactured at home is also federally lawful (no orange-tip rule on personal manufacture).

10.5.2 State imitation-firearm laws

State laws on imitation firearms vary substantially. Key states with restrictive rules:

State	Statute	Posture
California	Penal Code § 16700; § 20165–20166	Imitation firearms must be brightly colored, transparent, or otherwise distinguishable as not-a-real-firearm. The black-finished E-11 prop may not comply without coloration.
New York	Penal Law § 265.01	Imitation firearms restrictions; orange-tip rule re-enforced at state level.
New Jersey	N.J.S.A. § 2C:39-1	Imitation firearm definitions; some prohibited carries.
Massachusetts	MGL Chapter 269 § 12B	Imitation firearm restrictions; orange-tip rule re-enforced.
Hawaii	HRS § 134-16	Restrictions on lookalike firearms.
District of Columbia	DC Code § 22-4504	Imitation-firearm restrictions in public spaces.

For builders in these states: a black-finished E-11 carried in public outside a 501st-approved trooping context may violate state imitation-firearm law. The 501st convention context typically falls under exemptions or licensed exceptions; outside that context, the prop may not be legal in public spaces.

10.5.3 Practical posture for non-firing E-11 builders

• In-state, in-private: lawful in most states.
• In-state, in-public (outside trooping context): posture depends on state; CA / NY / NJ / MA / HI / DC builders should verify.
• 501st-approved trooping context (conventions, charity events): lawful in essentially all states under the event’s organizing context.
• Photographing at remote outdoor locations: legal in most states; the LE-encounter rule applies (Vol 11 § 11.3).

10.6 Path C from-scratch — manufacture-for-self

A from-scratch firing E-11 (semi-auto) is a manufactured-for-self Title I rifle. Federal posture:

10.6.1 Federal — making your own rifle

• No registration required for personal manufacture of a Title I semi-auto rifle under federal law.
• The receiver must be marked per ATF regulation. For home-built firearms, the maker is the “manufacturer” and must apply a unique mark to the receiver identifying the manufacturer and a serial number.
• The rifle must be semi-auto. Manufacturing a machine gun for personal use is prohibited by the Hughes Amendment (since 1986) — federal felony.
• The rifle must not be readily convertible to full-auto. Open-bolt operation is “readily convertible” under post-1982 ATF guidance and is prohibited for new manufacture.
• Sales / transfer: a home-built rifle cannot be sold without prior FFL transfer under federal law (some states permit private sales; verify state-of-residence rules).

10.6.2 State-level — manufacture-for-self

State law varies on home-built firearms:

• California: Penal Code § 29180; state serial-number requirement, must register the manufactured firearm with the state.
• New Jersey: AB-A6418 / similar; restrictions on home-built firearms.
• Washington: HB 1240; serial number requirement; permit to manufacture.
• Most other states: no specific manufacture-for-self regulation; federal posture controls.

10.6.3 Non-firing Path C build

A non-firing Path C build is not a firearm; manufacture-for-self regulation doesn’t apply. The imitation-firearm rules (§ 10.5) do.

10.7 The constructive-intent trap

Constructive possession of an NFA item: under federal law and ATF guidance, possessing both the parts to assemble an NFA item and the host firearm that the parts would convert can constitute possession of the NFA item itself, even without actual assembly.

Most-cited example: possessing a vertical foregrip and a pistol creates constructive possession of an Any Other Weapon (AOW) — a category of NFA firearm — even if the foregrip is in a drawer and never installed on the pistol.

E-11-specific risk: possessing full-auto Sterling parts (auto-sear, full-auto bolt, full-auto fire-control components) and a semi-auto Sterling clone (Wise Lite) or 80%-receiver build (Path A2) host could constitute constructive possession of an unregistered machine gun. This is a federal felony with mandatory minimums.

Practical rule:

• Don’t possess full-auto Sterling parts if you own a semi-auto Sterling clone or are building a Path A2.
• Don’t possess a vertical foregrip if you own a Sterling clone in a pistol configuration.
• Sell or destroy full-auto parts before building a semi-auto host.

For Path A3 (registered transferable) builders: this rule doesn’t apply because the Sterling is already a registered machine gun; the full-auto parts are inherent to the registration.

10.8 Transport across state lines

10.8.1 Path A1 (Title I rifle) transport

Federal posture (FOPA, 18 USC § 926A — “safe passage”):

• A Title I firearm may be transported through any state, even one where it would be unlawful to possess, if:
  • The firearm is unloaded.
  • The firearm is in a locked container (not the passenger compartment if the vehicle has a trunk).
  • The transport is from a place where the firearm may be lawfully possessed to a place where it may be lawfully possessed.

For E-11 Path A1 transport across multiple states: pack the rifle and magazine separately, in locked cases, in the trunk; carry the route’s documentation (showing source and destination); do not stop in regulated states beyond what’s necessary.

10.8.2 Path A3 (NFA / Class III) transport

ATF Form 5320.20 is required to transport a registered NFA item across state lines:

• Submit the form to ATF in advance (typical processing: 30–60 days).
• Form 5320.20 specifies origin, destination, dates, and route.
• The form must be in the transporter’s possession during transport.

Forgetting Form 5320.20 for a Class III Sterling transport is a federal violation. Plan transport at least 30 days in advance.

10.8.3 Path B / Path C non-firing transport

Non-firing imitation E-11 transports under state imitation-firearm rules in each state crossed; some states are restrictive. For convention transport, the convention’s event-context typically applies (state-permitted exceptions for licensed events).

10.9 What this volume is not

• Not legal advice. Firearms law is jurisdiction-dependent and changes; consult a licensed firearms attorney in your state for specific situations.
• Not exhaustive of state law. Only the most-restrictive states are detailed; check state-of-residence rules for any state not covered.
• Not a guide to converting a semi-auto to full-auto. Such conversion is a federal felony under the Hughes Amendment. Categorically out of scope.
• Not a guide to building an unregistered NFA item. Manufacturing an unregistered machine gun, SBR, SBS, suppressor, or AOW is a federal felony with mandatory minimums.
• Not a 922(r) parts-list-builder. Vol 4 § 4.3.4 has the specific Sterling parts-kit count; this section covers the rule itself.

10.10 References (Vol 10)

• ../../_shared/legal_ethics.md — hub-wide legal posture. This volume is the build-specific tail-end.
• 18 USC § 921 — federal firearms definitions.
• 18 USC § 922 — federal prohibited-person rules and § 922(r) parts-count rule.
• 18 USC § 926A — FOPA safe-passage rule for Title I firearm transport.
• 26 USC § 5841 — NFA registration.
• 26 USC § 5811 — NFA transfer tax.
• 26 USC § 5845(b) — machine-gun definition.
• 26 USC § 5861 — NFA prohibited acts.
• 27 CFR § 478 — GCA Title I implementation.
• 27 CFR § 478.11 — firearm definition.
• 27 CFR § 478.39 — § 922(r) regulated-parts list.
• 27 CFR § 479 — NFA Title II implementation.
• 15 USC § 5001 — Toy Gun Marking Act / imitation firearm rules.
• ATF Form 4 (5320.4) — Application for Tax Paid Transfer and Registration of a Firearm.
• ATF Form 5320.20 — Application to Transport NFA Item Across State Lines.
• ATF Open Letters and Determination Letters — searchable on atf.gov. Cited by letter number when available.
• Hughes Amendment (Firearm Owners Protection Act of 1986, P.L. 99-308) — May 19, 1986 machine-gun closure.
• California Penal Code § 16700 etc. — California imitation-firearm law.
• New York Penal Law § 265.00 etc. — New York firearms law (SAFE Act).
• Other state statutes per § 10.2.2 and § 10.5.2.
• Vol 3 — Donor Firearm Provenance — Sterling Mk 4 / L2A3 — context for the donor’s legal status.
• Vol 4 — Build Path A — per-flavor build context for the legal posture in this volume.
• Vol 6 — Build Path C — From Scratch — context for the manufacture-for-self posture in § 10.6.
• Full bibliography consolidated in Vol 12.