The New Frontier Armory LW-4 polymer lower is the strongest polymer based lower receiver ever made. It is manufactured using Nylon 6, a glass filled and chemically coupled nylon polymer for maximum durability and strength.This will be the perfect lower for your AR-15 build to make it extremely light and incredibly durable. We have a lifetime warranty on our lowers to back that up.

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  • Extremely durable with glass filled nylon-6 reinforced polymer construction
  • Accepts all MIL-SPEC and standard AR-15 parts and upper receivers 
  • Utilizes a square nut that seats in the pistol grip boss to provide a stronger, more durable attachment of the pistol grip (screw, washer and nut included!)
  • Lifetime warranty on all our lowers
  • Half the weight of an aluminum lower
  • Weighs only 4.15 ounces