Home » Shop » Otter Creek Labs Polonium K, 5.56 NATO, 4.8″ Length, 1.625″ Diameter, Cerakote Finish, Black
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OCL POLONIUM K SUPPRESSOR 556 BLK

Original price was: $540.00.Current price is: $522.00.

Out of stock

🔇 NFA made simple — we are an SOT/Class III dealer and walk you through the entire ATF process in-house. Questions? Call (817) 393-4000 before you buy.
Product Code: OCLPOLK Category: Brand:

Otter Creek Labs Polonium K 5.56 compact suppressor Black — OCL compact 5.56 NFA can. $0 stamp (OBBBA). Western Sport TX 817-393-4000.

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Product Description

⚠ NFA ITEM — SUPPRESSOR
This is a federally regulated suppressor under the National Firearms Act. Purchase requires BATFE Form 4 transfer, background check, and $200 NFA tax stamp — now $0 under the One Big Beautiful Bill Act (OBBBA). Buyer must be 21+, US citizen, NFA-legal state, no disqualifying criminal history. Allow about two weeks or less for ATF approval. Western Sport handles all paperwork — call 817-393-4000.

Otter Creek Labs: Precision American Suppressors

Otter Creek Labs (OCL) is a boutique American suppressor manufacturer known for their Infinity, Milkman, Lithium, and Polonium product lines — each targeting a specific caliber and use case with precision machining and quality materials. OCL suppressors are made in the USA and known for outstanding tone, durability, and minimalist design.

The OCL Polonium K 5.56 in Black is Otter Creek Labs’ compact (Kilo) 5.56 suppressor — the affordable OCL option for 5.56/.223 AR-15 and carbine shooters. The K (compact) form factor makes it an excellent match for SBRs and mid-length ARs. American machining, black finish.

Spec Detail
Caliber 5.56 NATO / .223 Rem and smaller
Size Compact (K)
Application AR-15, SBR, carbines
Finish Black
Made in USA Otter Creek Labs
NFA Class Suppressor — Form 4, $0 stamp (OBBBA)

Why Buy From Western Sport?

Western Sport is a licensed FFL/SOT dealer in Roanoke, Texas, serving NFA customers since 2007. We carry Otter Creek Labs suppressors including the Infinity, Milkman, Lithium, and Polonium series. Call 817-393-4000.

Recent eForm 4 approvals have been coming back in about two weeks or less — see our NFA wait times guide for current figures.

Additional information

Weight 1.062 lbs
Brand Otter Creek Labs
Caliber

Finish

Mount Type

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Out of stock — but we have these 5.56 NATO cans on the shelf right now

Want this exact one? We can often get it in. Call (817) 393-4000 and we will tell you the real lead time, or browse everything in stock.

First suppressor? Here is how buying one actually works.

Western Sport has been an SOT / Class III dealer in Roanoke, Texas since 2007. You buy the can here, we hold it in the safe, and we file the ATF paperwork for you — fingerprints and photo included. Your federal tax stamp is $0.

NFA Made Simple — the step-by-step
What the August 2026 court ruling actually changed
Questions? Call us at (817) 393-4000.

In Stock Now — Comparable Options

This item is out of stock. These are on the shelf today and ship or transfer the same way. Not sure which is the right swap? Call 817-393-4000 and we will tell you straight.

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