S.W.O.R.D. Defense, located in Sparks, Nevada, USA, is “a veteran owned and staffed warfighter solution focused company”. They have just released a new piston upper receiver called PURG-E, especially developed for M855A1 ammunition.
The upper receiver is flat top with a full length Picatinny rail, as well as M4-pattern feed ramps and is CNC machined from 7075 T6 Aluminum which has been hard coat anodized. The company says that the PURG-E should be considered as an upgrade to the M4 Carbine. It is compatible with current issued M4 Mil-Spec lowers, both with semi-only or select-fire systems.
The operation is short stroke gas piston and push rod system. The bolt is ultra lightweight, but despite the weight savings the company claims that is has incredible durability and that the unlocking and recoil impulses have been greatly reduced.
Here is their product announcement:
Sparks, NV — S.W.O.R.D. International’s Defense division has announced immediate availability of the Piston Upper Receiver Group-Enhanced (PURG-E). The PURG-E, which is designed to address problems identified by warfighters with current weapon systems and the M855A1 round. The PURG-E integrates with Mil-Spec lower receivers and was engineered and manufactured to provide a cleaner, highly reliable, and extremely durable operating system.
“The M855A1 has a number of characteristics in its design that make it an effective tool for the warfighter, some of those characteristics such as the increase in chamber pressure and cartridge design make it a liability for existing DoD weapon systems. We designed our PURG-E upper to solve these accuracy, reliability, and durability issues. The PURG-E upper converts existing MIL-Spec lowers to the right system for the M855A1 cartridge. The PURG-E also allows for use of the readily available cartridges such as M855, Mk-262 MOD1, and COTS ammo.”
-Jeremy Elrod, President
New Upper for New Ammo
Created in response to direct feedback from those who have worked in the field, the PURG-E reduces fouling, gas blow-back, identified after adopting new M855A1 ammunition. The PURG-E is an upgrade to the M-4 Carbine, redesigned yet compatible with current issued M-4 Mil-Spec lowers having semi-only or select-fire systems.
PURG-E features are centered on the rotating bolt, which is built with added material and radius where it counts most. Other improvements include:
• A driving band ride surface and lubrication groove to minimize the flex seen with a standard ring style bolt configuration.
• A newly designed, incredibly durable ultra-lightweight bolt carrier that substantially reduces unlocking and recoil impulse.
• Enhanced materials used in carrier, bolt, and operating system to increase strength and reliability.
• Proprietary enhanced gas piston system to allow for use of traditional rounds and M855A1
These enhancements make the PURG-E a far more effective tool in the hands of warfighters while maintaining the tried and true proprietary, self-regulating, short-stroke gas piston system.
From the Product Page we can find these details:
The Piston Upper Receiver Group Enhanced (PURG E) was created in direct response to problems identified by the warfighter, from use of the newly adopted M 855 A 1 ammunition The PURG E was developed from the ground up, a complete upgrade and redesign, capitalizing on direct feedback from end users . The PURG E retains the tried and true proprietary, self regulating, short stroke gas piston system This system greatly reduces fouling and gas blow back into the face of the shooter, as well as providing unparalleled performance and durability under the harshest conditions found The system has been engineered and manufactured to integrate Mil Spec lower receivers while providing a cleaner, more reliable and durable operating system.
I was not able to find a price on their homepage. For more information please check: https://sworddefense.com/purge/
The company also has a few other interesting firearms listed: https://sworddefense.com/armssolutions/