Silynx PT21 U94 Push-To-Talk Unit

The Silynx PT21 is a single-com, wired push-to-talk (PTT) unit built for tactical communications use, available in Black and Tan. It features an ambidextrous two-button layout, NEXUS headset connectivity compatible with US and NATO standard tactical headsets, and a heavy-duty MOLLE attachment system. The PT21 ships standard with a U329 6-pin Audio Radio Connector and can be configured with other tactical radio connectors.

Ambidextrous Layout for Left- or Right-Hand Operation

The PT21 carries two PTT buttons positioned for natural use with either hand. Operators who switch shoulders, work around obstacles, or need to transmit without repositioning their grip can do so without adjusting technique. The ergonomic housing keeps both buttons accessible whether the unit is mounted on the left or right side of a chest rig or plate carrier.

NEXUS Connectivity Across US and NATO Headsets

NEXUS headset connectivity means the PT21 works with a wide range of tactical headsets built to US and NATO standards, not only Silynx's own lineup. Operators who already run a compatible headset can integrate the PT21 without replacing existing equipment. The unit ships with a U329 6-pin Audio Radio Connector and can be ordered with other tactical radio connectors to match the radio in use.

Secure MOLLE Attachment and Rugged Construction

The heavy-duty MOLLE system lets the PT21 mount quickly and securely to tactical gear without additional hardware. The unit meets MIL-STD-810G environmental standards and carries an IP67 immersion rating, meaning it is sealed against dust ingress and can withstand temporary water immersion. Operating temperature range is -31°C to +70°C, covering cold-weather and hot-climate deployments. The compact housing measures 2.2" L x 2.1" W x 0.9" H and weighs 100 g.

Features

  • Two PTT buttons: ambidextrous layout for left- or right-hand use
  • NEXUS headset connectivity: compatible with US and NATO standard tactical headsets
  • Standard radio connector: ships with U329 6-pin Audio Radio Connector; additional connectors available
  • MOLLE attachment: heavy-duty system for secure mounting to tactical gear
  • MIL-STD-810G rated: meets military environmental standard
  • IP67 immersion rating: sealed against dust and temporary water immersion

Specifications

Specification Value
Dimensions 2.2" L x 2.1" W x 0.9" H
Weight 100 g
Number of PTT Buttons 2
Radio Connectors Included 1 (U329 6-pin Audio Radio Connector)
Headset Connectivity NEXUS (US and NATO standard compatible)
Environmental Standard MIL-STD-810G
EMI Standard EN 60950-22
Immersion Rating IP67
Operating Temperature -31°C to +70°C
Colors Available Black, Tan

Who This Is For and Isn't

The Silynx PT21 suits military personnel, law enforcement officers, and security professionals who need a rugged, MOLLE-mountable wired PTT compatible with a broad range of US and NATO standard tactical headsets. Its ambidextrous design makes it practical for operators who work in varied positions or switch hands under load.

The PT21 is a wired PTT unit and does not provide wireless transmission capability. It is a single-com unit and does not support simultaneous dual-radio operation. Buyers requiring weapon-mounted or wireless PTT functionality should consider a different unit. The PT21 is sold for end use in the United States only.

Common Questions

Which headsets work with the Silynx PT21?

The Silynx PT21 uses NEXUS headset connectivity, which is compatible with a wide range of tactical headsets built to US and NATO standards. This includes Silynx's own headset systems as well as many third-party tactical headsets that use the same standard connector. Confirm your headset's connector type before ordering.

What radio connector does the PT21 ship with, and can I get a different one?

The Silynx PT21 ships standard with a U329 6-pin Audio Radio Connector. It can be ordered with a variety of other tactical radio connectors to match your specific radio. Contact us to confirm which connector option is available for your radio before placing your order.

How does the PT21 attach to gear?

The Silynx PT21 uses a heavy-duty MOLLE attachment system that mounts quickly and securely to MOLLE-compatible plate carriers, chest rigs, and other tactical gear. No additional mounting hardware is required for MOLLE attachment.

What environmental ratings does the PT21 carry?

The Silynx PT21 meets MIL-STD-810G environmental standards and carries an IP67 immersion rating, meaning it is fully sealed against dust and can withstand temporary water immersion. Its operating temperature range is -31°C to +70°C, covering a wide range of field conditions.

Can the Silynx PT21 ship to my location?

The Silynx PT21 is sold for end use in the United States only. Contact us with any questions about your specific shipping address before ordering.

Bulletproof Zone will ship orders as soon as possible. For example, if you purchase three items, they will be shipped to you based on lead time and availability. This way you get as much of your order as soon as possible, which means that your order may come in separate packages, especially if you order products from different manufacturers.

We will bear the shipping cost for products returned because of product defect, misrepresentation, or false description. Afterward, we will initiate a full reimbursement should you decline an offer to replace the item with the same item of equal value and assured quality.

Order Confirmation:

As soon as you place your order with Bulletproof Zone, you will receive an order confirmation e-mail. This means that your order has been logged in our system and your credit card has been pre-authorized for the purchase. Afterward, we contact our suppliers to confirm the availability of the product you are ordering for immediate shipment. If your item is on backorder or unavailable, we will cancel the pre-authorization and duly inform you via e-mail.

Order Shipment:

Orders are shipped within five business days from the date of your order unless specified otherwise on the product page. The product page will contain the most accurate estimate on shipping and lead times. Shipping and lead times provided on the product page are our best estimates based various factors including order volume, information from our manufacturer, raw material fluctuations, etc., and may vary due to these factors. 

You will receive an email containing the tracking information of your order after the order has been shipped to your location. If you do not receive tracking information from us within seven business days of the lead time specified on the product page, feel free to follow up with us at orders@bulletproofzone.com.

Bulletproof Zone is not responsible for lost or stolen packages. A tracking number will be provided when the package is shipped. It is the buyer’s responsibility to provide a safe place to receive mail. Once an item has been marked as delivered by the carrier, the seller is not responsible should that item go missing. 

Some of our products are carried by manufacturers in various countries. Due to the nature and cost of the products that Bulletproof Zone sells, you may be charged additional import duties upon delivery. Our support team can help in investigating abnormally high import duty charges but we are unable to cover the cost of any import duties.

Damages:

We take full responsibility for any obvious damage to your product caused by wrong packaging or delivering an already defective product. Please inspect the packaging of your item(s) when they arrive, if you notice any damage, you should document it when signing for delivery. If the item(s) contained in the package arrives damaged, please send photos to support@bulletproofzone.com, and we will process an insurance claim on your behalf. 

Returns and Cancellation Policy:

We back all our products with a customer satisfaction guarantee, so we created a fair return and cancellation policy.

All sales are final. No Refunds, No Cancellations. In most cases, once the order is processed, it is final and not cancellable. We may allow exceptions due to an order error or wish to return your order after delivery for any reason other than a product defect or misrepresentation. Any cancellation request is subject to an administration and cancellation fee equal to 10% of your order with a minimum of $35, whether order shipment is successful or not. 

All sales are final on all closeout items and for custom manufactured bulletproof clothing once the manufacturing process has begun or not returnable unless there is a product defect or misrepresentation. Applicable to brands such as MC Armor, Israel Catalog, BulletBlocker, Tacticon Armament, Wonder Hoodie, and others. 

Before returning any product, you MUST obtain a return authorization from our customer service representative. We can only process AUTHORIZED returns for items.

To make a Return or Exchange: 
  • Obtain authorization for return or exchange by emailing us at support@bulletproofzone.com explaining the reason for the return or exchange.
  • Please use or indicate your order number as attention

Return or exchanges request submission must be within 14 calendar days upon receipt of shipment unless noted otherwise on the product description page.  Your return must be in original packaging and unused.

We encourage using USPS flat-rate shipping in returning products to receive a shipping expense refund. Buyers must ensure all returned parcels delivery receipt AND signature confirmation. We highly recommend insuring your parcel as we cannot issue a refund for an item that we do not receive back should it get lost/damaged during transit.

Refunds:

Should an item be returned because it was defective, misrepresented, not as described, etc., Bulletproof Zone will issue a full refund and will reimburse the customer for all shipping expenses associated with the return.

Please allow 5-10 business days from the time the item is received to process a refund. Refunds will only be issued to the original credit card that you use when placing your order.

We stand behind our products 100%!

By purchasing any of our items, the buyer certifies they have read and agree to our shipping, return, and privacy policies.

The Bulletproof Zone Promise

When you buy body armor, you're buying your safety. We don't take that lightly. Here's what every order from Bulletproof Zone includes.

1. Authorized dealer of every brand we carry

Every plate, vest, and carrier we ship comes from the manufacturer directly to our warehouse. We don't sell gray-market product, surplus, or returns. That means factory-fresh stock, the full manufacturer warranty, and real after-sale support — the kind only an authorized dealer can offer.

We maintain authorized-dealer relationships with America's leading body armor brands, including Spartan Armor Systems, AR500 Armor, RMA Defense, Shellback Tactical, Caliber Armor, DFNDR Armor, Protection Group Denmark, BulletSafe, BulletBlocker, and over 40 more.

2. Best price, guaranteed

If you find a lower price at another authorized dealer of the same product within six months of your purchase, we'll refund the difference.

Why the "authorized dealer" requirement? Because gray-market and surplus armor may not be genuine, may have a compromised supply chain, and almost never comes with a manufacturer warranty. We won't price-match against products that may not actually protect you.

3. Free fitment consultation

Body armor only protects you if it fits. Email us a photo and your measurements before you order, and one of our specialists will help you size your carrier and plates correctly — at no charge, no obligation.

4. Trusted by thousands of customers

Bulletproof Zone has been a trusted authorized dealer of America's leading body armor manufacturers for over five years. We have over 4,000 verified Trustpilot reviews from real customers across all 50 states.

Price Match Guarantee — Terms

  • You must have purchased the item from our website before requesting the price match.
  • Discounted items and "free with purchase" items are not eligible.
  • The item must be in stock on the competitor's website at the time of your request.
  • The price match is valid for six months from the date of your purchase.
  • The competitor must be an authorized dealer of the product. Auction sites (eBay, Overstock), discounters, and gray-market resellers do not qualify.
  • The competitor must operate an online store. Brick-and-mortar-only retailers do not qualify.
  • Price match applies to the item price plus shipping. Sales tax is excluded.

To request a price match, email us a link to the product on our site and the same product on the competitor's site within six months of purchase. We'll process the refund.

Why Bulletproof Zone?

At Bulletproof Zone, we are passionate about protecting lives. Every piece from our catalog is designed and rigorously tested to provide the highest quality of protection you need from firearms, explosives or even close quarters combat.

We’ve partnered with various manufacturers that operate within the United States under a strict set of guidelines both on a national and corporate level so that when you shop with us, you will be able to select from the highest quality body armor, ballistic plates and tactical gear available on the market.

Whether you are a military service member looking to find your own gear, a professional that operates in the security field, or an avid firearms enthusiast that capitalizes the importance of safety when shooting, our tactical gear will provide you the level of protection you need.

Any questions or concerns? Please call us at (408)-909-4938 or email us at support@bulletproofzone.com and a member of our professional support team will be in touch with you as soon as possible.

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