Patents & Technology

DPMS President Randy Luth believes that AR-15 rifles can be better and has pursued that belief for more than 20 years. DPMS employees continue research and development on new designs, manufacturing techniques and materials to improve the components that makeup and maintain AR-15 rifles. To date, Mr. Luth holds four U.S. patents for innovative products designed for the AR-15 rifle.

Mangonel Front and Rear Flip-Up Sights

The patented "Mangonel" Front Flip-Up Sight uses an aluminum base with steel legs and a steel clamp for durability and strength. The whole sight assembly weighs only 3.8 ounces. This design unit uses an A2 front sight. A large thumb knob is easily manipulated to loosen or tighten the clamp. The sight is designed to fit on the MIL-STD-1913 Picatinny accessory rail. The front sight has three positions:

  • 1st Position: down
  • 2nd Position: for use on gas blocks
  • 3rd Position: Both the front sight and the rear sight are on the same rail.


Mangonel Rear Flip-Up Sight

Our patented "Mangonel" Rear Sight has two legs that flip up and down. Each leg is supported by the other. Fast and accurate sight acquisition; provides an excellent back-up, close quarter, near sight assembly.

  • Slim line and flat
  • Easy to raise and lower with positive lock in upright position
  • Adjustable windage
  • Aluminum base with steel legs
  • 1/8" diameter aperture
  • Fixed elevation, Std. A2 aperture height
  • Detachable assembly
  • Picatinny capable

U.S. Patent No. 6,732,467. (View PDF)



For more than 100 years, fins have been used to cool metal objects. Now, DPMS Firearms, LLC brings that concept to your A-15 rifle with GlacierGuards™, an AP4-style handguard that utilizes 15 internal fins for heat dispersion. To further enhance this evolutionary design, GlacierGuards move beyond the standard aluminum double-shield and employ an advanced, fiber-reinforced polymer that withstands temperatures greater than 500 degrees, yet weighs just ounces.

The unique design allows the fins to disperse heat generated by rifle fire while providing unsurpassed strength and rigidity for the handguard. These design benefits are enhanced by the material, which resist over-heating after continuous fully-automatic fire for over 200 rounds. Externally, GlacierGuards™ feature 15 ribs that mirror the internal fins, and provide the shooter an enhanced grip. A pair weigh just 8 ounces, compared to the standard .4 pounds per pair.

U.S. Patent No. 6,945,154  [View PDF]


Panther Claw

The patented Panther Claw is the perfect armorer’s tool for holding all AR style upper receivers. Made of a solid, one-piece high strength polymer, the Panther Claw is extremely durable. Simply clamp it into a bench vise, slide the upper onto the Claw, secure with the two holding pins, and begin installing your barrel and components.

The 308 Panther™ Claw fits both the LR-308 family of rifles, as well as the SR-25 from Knight’s Armament. With some slight modifications for the mag well, AR-10's will also fit this versatile gunsmithing tool. Makes installing barrels a breeze!

U.S. Patent No. 6,761,101 [View PDF]


M-37 Flare Launcher

Barrel 16" Aluminum Smooth Bore (no rifling)
Chamber 37mm Flares & Pyrotechnics
Breech Drop open loading like M79 Grenade Launcher Aluminum Breech
Sights M-203 Leaf Sight adapts to the top of this receiver as an option
Upper Receiver  Aluminum receiver Hard coat anodized per Mil Spec and Teflon® coated black Direct swap for your existing upper, no modifications Utilizes existing A15/M16 lower assemblies

U.S. Patent No. 6,293,040 [View PDF]