Frequently Asked Questions
Legality & FFL Transfer
Is a .50 BMG upper legal for me to own? Do I need a special license?
In most states, the Raptor 50 upper is treated like other serialized firearms and transfers through your local FFL. There is no special federal license for typical buyers.
Laws vary by state and change often. California, Illinois, New Jersey, and the District of Columbia generally restrict or prohibit .50 BMG in ways that block ordinary civilian sale or transfer. Some states require extra permits or registration even when .50 BMG is not fully banned.
→ Full state-by-state guide: 50 BMG Laws by State
Why is an FFL required for the Raptor 50 upper?
In 2018, ATF’s Firearms and Ammunition Technology Division determined that .50 BMG AR-15 uppers are firearms and must transfer through FFLs. The Raptor 50 is serialized and ships to your dealer for a background check and transfer paperwork.
Buyers must be 21 or older because the upper is transferred as a receiver.
What states do you ship to?
We ship only where lawful fulfillment is confirmed. We do not sell for ordinary civilian transfer to California, Illinois, New Jersey, the District of Columbia, or other jurisdictions where the platform, receiver, or resulting rifle is prohibited.
Always confirm with your FFL and current state code before ordering.
→ See every state and territory: 50 BMG Laws by State
Does single-shot, bolt-action matter for state law?
Yes. Some state restrictions target semiautomatic .50 BMG rifles. The Raptor 50 is a single-shot, bolt-action upper, which can affect how state law applies. Verify with your FFL — our legal guide explains this distinction for each state.
Can I use any AR-15 lower?
A quality 7075 mil-spec AR-15 lower is strong enough; most recoil goes into the stock, not the lower. Some states restrict certain AR-15 lowers. If in doubt, use a single-shot lower without a mag well — Big Kahuna offers compatible lowers for that setup.
Product & Compatibility
Can my AR-15 lower handle .50 BMG recoil?
Yes, with a proper mil-spec lower. This design has been proven for 17+ years with thousands of uppers and tens of thousands of rounds. The upper fits snug in the lower; the lower mainly holds the fire-control group.
What barrel does the Raptor 50 use?
Lothar-Walther precision barrels, machined and assembled in the USA at Big Kahuna Guns in Odessa, FL.
→ Read more: How We Machine the Raptor 50 in America
What optics work on a .50 BMG upper?
Choose optics built for heavy recoil — ruggedness and hold-zero matter more than marketing specs. Ring height, eye relief, and scope body size all matter on this platform.
→ Full guide: Choosing Optics for a .50 BMG Upper
Can I put a suppressor on the Raptor 50?
Yes, with a .50 BMG-rated suppressor. The barrel has a common 1:14 thread. Follow all federal, state, and local NFA rules.
Ammo & Shooting
How much does .50 BMG ammo cost?
Typically $3.80–$7.50 per round depending on type, source, and quantity. Quality factory ball ammo often runs $3.80–$5 per round.
What ammunition should I use?
Factory-loaded ammunition from a known manufacturer. Avoid surplus or unknown-origin ammo. Counterfeit or improperly loaded rounds can cause catastrophic failure regardless of firearm quality.
I saw a YouTuber get hurt when his .50 BMG rifle blew up — was it the gun?
That incident involved a Serbu RN50 and a counterfeit slap round loaded with wrong powder — not a Raptor 50. Kentucky Ballistics and Mark Serbu both concluded it was an ammunition failure:
We strongly recommend using only factory ammunition.
Ordering & Payment
How do I order a Raptor 50?
Order through the website or you may call (813) 790-7220 to order; the upper will ship to your chosen FFL for transfer. Let us know which FFL you wish to use before we ship your Raptor 50.
When will I get my Raptor 50?
Your Raptor 50 is built to order at our factory in Odessa, FL. Production time averages 4–8 weeks, depending on our current production cycle and order volume.
Here is what to expect after you place your order:
- Order confirmation — You receive confirmation once payment is processed and your order is in the queue.
- Production — Your upper is machined, assembled, and inspected during the current build cycle. Lead time varies with batch size and shop schedule; we do not ship from shelf stock.
- Ship to your FFL — When your Raptor 50 is complete, it ships to the Federal Firearms License dealer you selected at checkout. Your dealer completes the transfer and background check before you take possession.
Planning tip: If you need your upper by a specific date — range day, hunt, or event — contact us before ordering so we can give you a realistic estimate for the current cycle.
My card was declined but I have funds — why?
Often a per-transaction purchase limit at your bank (fraud protection). Call your bank to approve the charge or temporarily raise the limit. You can also pay by check or money order — we process the order after the check clears.
Do you offer dealer pricing?
Yes. Qualified FFLs can become Raptor 50 dealers. Send your FFL name and contact info; we’ll send dealer program details.
From Our Blog
Guide | What you'll learn |
Ownership, transfers, and restrictions for every state | |
Scope durability, rings, and setup before you spend | |
USA manufacturing from raw steel to ready-to-ship | |
Platform engineering and what makes the Raptor 50 different | |
Company history and product line expansion |
→ All articles: Big Kahuna Guns Blog
This page is general information only, not legal advice. Firearm laws change frequently and local ordinances may add requirements. Confirm with your local FFL, current state code, and qualified counsel before buying, importing, transporting, or transferring a Raptor 50 or .50 BMG ammunition.