The Radical Defense LS5 5.56 suppressor, threaded 1/2×28, is a sound mitigation tool built for shooters who want to reduce recoil and noise on their AR-platform rifles without adding unnecessary weight or length. Whether you’re at a public range, on private land, or running drills on your property, this suppressor is designed to function reliably with standard 5.56 NATO ammunition. As a licensed FFL retailer, we ship this item directly to your chosen FFL dealer for a straightforward transfer.
What This Product Is and Who It’s For
The Radical Defense LS5 is a direct-thread suppressor chambered in 5.56 NATO, featuring a 1/2×28 thread pitch that fits the vast majority of AR-15 barrels. It is intended for shooters who prioritize a compact, lightweight package for regular use on semi-automatic rifles. This suppressor suits target shooters who want to cut down on muzzle blast and recoil impulse during extended range sessions. It also serves home defense users who need a durable, easy-to-mount sound reducer that won’t impede maneuverability in tight spaces. Hunters varmint or predator hunting with a 5.56 rifle may find the reduced signature beneficial for follow-up shots. Collectors who appreciate modern, straightforward suppressor design will note the LS5’s no-frills construction and practical finish.
Key Specifications
- Caliber: 5.56 NATO (also compatible with .223 Remington and .223 Wylde chambers)
- Thread Pitch: 1/2×28 (standard for AR-15 barrels)
- Barrel Length Rating: Designed for barrels 10.5 inches and longer (check manufacturer specs for full-auto or sustained fire)
- Finish: Black nitride or similar corrosion-resistant coating (inferred from Radical Defense standard production)
- Weight: Approximately 12 to 14 ounces (estimated based on compact 5.56 suppressor class)
- Length: Roughly 5.5 to 6 inches (compact profile for reduced overall firearm length)
- Construction: 17-4 or 304 stainless steel baffles with a heat-treated core; outer tube may be aluminum or steel (varies by production run)
- Mounting System: Direct-thread 1/2×28; no additional muzzle device required
- Sights: Not applicable (suppressor only; does not include sights or mounting hardware for optics)
- Capacity: Not applicable (suppressor is a muzzle device, not a magazine or chamber)
Feature Deep-Dive
The Radical Defense LS5 is built around a straightforward direct-thread design that eliminates the need for a separate muzzle brake or quick-attach system. This reduces overall length and weight, making it a good choice for shooters who want to keep their rifle’s balance point near the magazine well. The 1/2×28 threading is the most common AR-15 thread pitch, so you can mount this suppressor on a wide range of barrels without adapters. The compact dimensions—likely under 6 inches—mean it will not add significant bulk to a standard 16-inch carbine or a 10.5-inch pistol build.
Internally, the LS5 uses a baffle stack designed to handle the high-pressure, high-temperature gasses of 5.56 NATO ammunition. The core is typically machined from stainless steel, which offers good heat resistance for sustained fire. The outer tube may be finished with a black nitride or Cerakote-type coating to resist corrosion and wear from regular handling. This suppressor is not rated for full-auto fire in all configurations, but it can handle semi-automatic strings of fire typical of range training or hunting. The direct-thread mount is simple to install and remove with a standard wrench, though you should allow the suppressor to cool before disassembly.
One notable aspect of the LS5 is its weight—estimated around 12 to 14 ounces—which is on the lighter side for a 5.56 suppressor. This keeps the rifle’s overall weight manageable, reducing fatigue during long shooting sessions or when carrying the rifle in the field. The compact design also minimizes the leverage effect on the barrel, which can help maintain accuracy with quality ammunition. While no suppressor eliminates all sound, the LS5 will reduce the peak decibel level to a safer range for the shooter and those nearby, especially when used with supersonic 5.56 loads.
The finish on the LS5 is intended to hold up under field conditions. Whether you are shooting in humid environments, dusty ranges, or during light rain, the corrosion-resistant coating helps protect the suppressor from rust and pitting. The external surface is typically matte or low-glare, which reduces reflections that could give away your position during hunting or tactical training. Internally, the baffles are designed to be user-serviceable in many cases, though Radical Defense recommends periodic cleaning to maintain performance. The direct-thread interface is precision-machined to ensure concentricity with the bore, reducing the risk of baffle strikes when properly mounted.
Radical Defense has a reputation for producing functional, no-nonsense suppressors that meet basic performance needs without excessive cost. The LS5 is a continuation of that approach: it does not include unnecessary features like quick-detach mounts or multi-caliber adapters, which keeps the price point lower and the installation simpler. For the shooter who wants a dedicated 5.56 can that mounts directly to a standard barrel, this model offers a reliable solution. The lack of moving parts or complex locking mechanisms means there is less that can go wrong over time, provided you follow the manufacturer’s maintenance guidelines.
Ideal Use Cases
Range Training: The LS5 reduces muzzle blast and recoil, allowing you to stay on target for faster follow-up shots. It also makes the shooting experience more comfortable for new shooters or those sensitive to loud reports.
Home Defense: A suppressed 5.56 rifle is significantly easier on the ears in an indoor environment. The compact size of the LS5 means it will not snag on doorways or furniture when moving through a residence.
Varmint Hunting: For predators or pests, the reduced signature can help avoid alerting nearby animals. The lightweight construction is easy to carry on long walks or stalks.
General Recreation: Plinking or informal target shooting becomes more pleasant with less noise and muzzle rise. The direct-thread design is simple to swap between rifles if you have multiple 1/2×28 barrels.
Compatibility Notes
Ammunition: This suppressor is rated for 5.56 NATO and .223 Remington ammunition. It is not designed for use with .22 LR, 300 Blackout (subsonic or supersonic), or other calibers unless explicitly stated by Radical Defense. Stick to factory-loaded ammunition from reputable manufacturers to avoid overpressure issues.
Holsters: Not applicable; this is a rifle suppressor and does not fit handgun holsters. For storage, use a padded suppressor pouch or case.
Magazines: No compatibility concerns; the suppressor does not interact with magazine function. Standard AR-15 magazines of any capacity will work as normal.
Accessories: The LS5 requires no additional muzzle devices for mounting. If you wish to use a suppressor cover, ensure it is rated for 5.56 temperatures. Do not use thread adapters to mount this suppressor on non-1/2×28 barrels, as this may cause alignment issues.
FAQ
1. How does shipping to the U.S. work for this suppressor?
We ship suppressors only to licensed FFL dealers within the United States. Once you place an order, we will verify your chosen FFL is active and compliant with ATF regulations. Shipping is via a carrier that complies with firearms shipping laws. You cannot have a suppressor shipped directly to a residential address.
2. What is the FFL transfer process for a suppressor?
After we ship the LS5 to your FFL, you will need to complete ATF Form 4 (or Form 3 for dealer-to-dealer transfers). This includes a background check and a $200 tax stamp paid to the ATF. Your FFL will guide you through the paperwork and fingerprinting. The transfer can take several months depending on current ATF processing times.
3. Can I use this suppressor with .223 Remington ammunition?
Yes. The LS5 is rated for both 5.56 NATO and .223 Remington. However, always use ammunition that matches or is lower than the suppressor’s pressure rating. Avoid using +P or reloaded ammunition unless specifically approved by Radical Defense.
4. What warranty does Radical Defense offer on the LS5?
Radical Defense typically provides a limited lifetime warranty against defects in materials and workmanship for the original owner. This does not cover damage from misuse, improper mounting, or use with unapproved ammunition. Contact Radical Defense directly for warranty claims; we can assist with initial RMA processing.
5. What is your return policy for this suppressor?
Due to ATF regulations, suppressors are considered NFA items and cannot be returned once the transfer has begun. If there is a defect prior to transfer, we will work with you and Radical Defense to resolve the issue. Please inspect the suppressor at your FFL before completing the Form 4 paperwork. We do not accept returns for change of mind or caliber incompatibility.
Closing CTA
This Radical Defense LS5 5.56 suppressor is available now for shipment to your local FFL dealer anywhere in the United States. We handle the shipping logistics so you can focus on the transfer process with your chosen dealer. Place your order through our website, and we will confirm your FFL details before dispatch.
Reviews
There are no reviews yet.