PURG-E Patented.


The Piston Upper Receiver Group-Enhanced (PURG-E) is based on the SWORD Defense Systems Mk-15 IDC platform in 5.56×45. The PURG-E boasts SWORD’s proprietary short-stroke gas piston system and is one of the most accurate and softest shooting piston upper receiver groups found on the market today. With the addition of the M855A1 to the DoD inventory, program officers and weapons maintenance personnel have noted higher rates of malfunction and critical failures of components on existing program-of-record weapons. SWORD Defense Systems has addressed this problem by reinforcing critical components and adjusting the gas system to address the higher pressures generated by the U.S. Military’s new round. SWORD Defense Systems is proud to offer the PURG-E, which is a nearly indestructible upper receiver group that reliably functions with both legacy and new ammunition, providing a degree of accuracy not found on the market today. The PURG-E is offered as a stand-alone upgrade for existing DoD 5.56 platforms, or integrated into the Individual Duty Carbine-Enhanced (IDC-E) as a full system.

The Sword Defense Systems PURG-E is offered in 5.56×45.



5.56 x 45 NATO (M855A1)

Weight: 4.2 lbs | 1.90 Kg

Length: Stock Extended:25.5″ | Stock Retracted: 23″

Height: 7 ¾″  (19.68cm) Rear sight to bottom of pistol grip

Barrel Length 12.5″-14.5”

Cold Hammer Forged

All barrels come standard with pin over the extractoR

Short Stroke Piston & Push Rod System

Safe, Semi-Automatic

Single-stage, Two-stage options

Fixed 12 O’clock rail, M-Lok compatible at 3/6/9 O’clock positions

Enhanced rotating bolt featuring added material as well as radius where it counts most. The bolt also features a driving band ride surface and lubrication groove which provides far less flex than a standard ring style bolt configuration. We have designed a new ultra lightweight bolt carrier which despite its weight savings has incredible durability as well as greatly reduced unlocking and recoil impulse. These enhancements make the PURG-E a far more effective tool in the hands of the warfighter.

All bolt and carrier components are compatible with select fire systems

Coatings: Bolt/Extractor – DLC, MPI tested

Carrier – DLC

Additional Options/Variations available upon request: 

Operators Suppressor System (OSS) 338 Ti, quick detach flush mount suppressor

Atlas PSR BT46-LW17 with ADM QD auto lock

Magpul MBUIS Pro 45°offset

Steiner M7xi 4 – 28 X 56

Visible, Infrared, or dual beam options available


Gas Block

Barrel Extension

Operating Rod

Bolt Carrier

Free Float Rail


Jointed Picatinny