The Polonium 5.56 from Otter Creek Labs delivers exceptional performance for shooters seeking a durable, effective suppressor without breaking the bank.
The Polonium 5.56 has earned its reputation as one of the market's most reliable budget suppressors, combining exceptional sound performance with uncompromising durability. Its 6mm bore accommodates 5.56/.223 rounds while also supporting 6mm/.243 cartridges.
What sets the Polonium apart is its thoughtful engineering. The distinctive external profile isn't just aesthetic—it's functional weight reduction that maintains structural integrity while increasing surface area for heat dissipation. This design choice results in a suppressor that cools more rapidly between firing sessions.
Night vision users will appreciate the integrated flash hider, which provides superior flash reduction compared to competitors when shooting in low-light conditions. The universal 1.375×24 rear threads allow compatibility with your preferred mounting system.
Constructed from H900 heat treated 17-4 stainless steel in a CNC welded tubeless design, the Polonium is built for hard use in demanding environments.
Pew Science has tested the OCL Polonium 5.56 on the 10.3" Mk18.
| Specification | Detail |
|---|---|
| Material | H900 heat treated 17-4 stainless steel |
| Construction | CNC welded tubeless design |
| Length | 5.8 inches |
| Weight | 13.5 oz (without mount) |
| Outer Diameter | 1.625 inches |
| Bore Size | 6mm |
| Thread Pattern | 1.375×24 rear threads |
| Finish | Cerakote Black |
Each Polonium 5.56 includes the suppressor, stickers, instruction pamphlet, 1/2×28 direct thread adapter, and a tube clamp for mount changes.
Otter Creek Labs products have limited availability from Charlie's Custom Clones. When the Polonium is not in stock, we recommend looking at the Rex Silentium MG7K Model 224. It offers a similar product in terms of durability, weight, and price.
picture credit: Alabama Arsenal, Charger Arms
Otter Creek Labs Suppressor – Economical Performance for Budget-Conscious Shooters
Not every shooter needs a top-tier, premium-priced suppressor. Many simply desire effective sound suppression at an affordable price. The Otter Creek Labs (OCL) suppressor delivers exactly this—solid value without breaking your budget.
However, sourcing affordable suppressors can often lead to compromises in customer experience, reliability, or business integrity.
This can be frustrating, especially when dealing with suppliers who struggle with consistent delivery timelines and professional interactions, causing unnecessary headaches for retailers and customers alike.
Affordable Pricing: Provides solid sound suppression performance at an accessible price point.
Reliable Construction: Adequate materials and workmanship for recreational and entry-level suppressor users.
Ease of Maintenance: Simple design makes it straightforward for casual shooters to maintain.
Effective Sound Reduction: Meets the needs of recreational shooters without premium costs.
Charlie's Custom Clones no longer maintains an active business relationship with Otter Creek Labs due to consistent operational disappointments, missed deadlines, and subpar professional interactions. Otter Creek Labs has requested the removal of our listings, and although we earn minimal profit from these suppressors, our obligation remains clear: If we legally purchase a product, we legally offer it to our customers.
When excess OCL stock becomes available to us, we choose transparency and customer choice over convenience. Despite our challenges with the business relationship and the unprofessional behavior we’ve experienced from OCL's management, their suppressors remain a fair choice for budget-conscious buyers. Importantly, we have received no negative feedback regarding Otter Creek Labs' warranty service, which remains directly between OCL and the end-user.
While our direct experience prevents us from wholeheartedly endorsing their business practices, the OCL suppressor itself represents reasonable quality and affordability.
Buying and shipping through Charlie’s is easy, but there is some information you need to know. This item must ship to FFL holder. No civilian exceptions.
1) Check your state laws to make sure the federally regulated item you want to purchase is legal in your state.
2) Find your FFL… Have your dealer send us a copy of their FFL and SOT to Charlie’s (Make them earn their fee!). Not every FFL is a SOT or Class 2 / Class 3 dealer.
3) Be patient! You should hear from our compliance department within 3-4 business days. If not, feel free to reach out for a status update.
That’s it! We try to make this process as simple as possible for our customers. Please click the “Buying a Firearm” tab at the top of this page for more information.
THIS IS A SERIALIZED ITEM. It must ship to a Federal Firearms License holder. No civilian exceptions.
Buying and shipping through Charlie’s is easy, but there is some information you need to know. Only a federally licensed firearms dealer may receive a firearm or federally regulated serialized item (like a receiver or suppressor). We cannot ship these items directly to you. Please follow these steps to process your transaction:
1) Check your state laws to make sure the federally regulated item you want to purchase is legal in your state. Your FFL dealer should be able to give you all of the necessary information regarding your state specific laws. But, if we ship to your FFL, and there is a legal issue, we cannot accept a return. So please make sure that you know and follow your local and state laws.
2) A quick google search will show you what Federal Firearms Licensed (FFL) dealers are in your area. When you are ready to purchase, contact the FFL dealer you would like to use and get their shipping address. During the check-out, put YOUR address in the “billing” section and the FFL DEALER’S address in the “shipping” section. If you don’t know your FFLs address, that’s okay. You can send the information later.
3) After check out, make sure to contact your FFL dealer to ensure they will receive your shipment for you (most do this for a small fee, but you should always double check).
4) Have your dealer send us a copy of their FFL to FFL@CharliesCustomClones.com. Charlie’s does not reach to your FFL (MAKE THEM EARN THEIR FEE!!!)
5) Be patient! In order to ensure we remain compliant with all federal laws, our compliance department is kept separate from our sales and operations team. Please allow a few days for our compliance officer to verify all of your dealer’s documents and ensure all federal laws are being observed. You should hear from our compliance department within 3-4 business days. If not, feel free to reach out for a status update.
That’s it! We try to make this process as simple as possible for our customers, but if you are unfamiliar the process or have any other questions, please visit our How to Buy a Suppressor page for more details.
Otter Creek Labs
