KNR Gunsmithing
KNR Gunsmithing

Hand Guards

all are free float and include a barrel nut. Super slim, Key-mod and Quad rails. 7" to 16". prices range from $45-$75

call for pricing.


Enhanced lower parts kit

Our AR-15 Lower Receiver Parts Kits (LPK's) include everything you'll need to put together a well-functioning and sleek Lower. The solid steel Trigger and Hammer are made in the U.S.A. and each of the pieces are also available separately.

The Enhanced Ambidextrous LPK includes our custom Polymer ergonomic pistol grip with storage compartment, custom reversible trigger guard, ambidextrous dual safety selector and extended grip takedown and pivot pins - all with a matte black finish.


Complete Kit Includes:

Ergonomic AR-15 Pistol Grip (Black), Pistol Grip Screw, Pistol Grip Screw Lock Washer, Trigger (U.S. made), Hammer (U.S. made), Extended Trigger Guard, Trigger Guard Screws, Semi Disconnector, Disconnector Spring, Ambi Dual Safety Selector, Safety Detent, Safety Spring, Bolt Catch, Bolt Catch Buffer/Plunger, Bolt Catch Spring, Bolt Catch Roll Pin, Magazine Catch, Magazine Catch Button, Magazine Catch Spring, Extended Grip Front Pivot Pin, Extended Grip Takedown Pin, Pivot Pin Detent, Pivot Pin Detent Spring, Takedown Pin Detent, Takedown Pin Detent Spring, Hammer Spring, Trigger Spring,, Hammer Pin, Trigger Pin, Buffer Retainer Pin, Buffer Retainer Spring


Anderson lower parts

Complete Lower Parts Kit includes: Bolt Catch, Bolt Catch Plunger, Bolt Catch Roll Pin, Bolt Catch Spring, Buffer, Retainer, Buffer Retainer Spring, Disconnect, Disconnect Spring,  Traditional Hammer (Black in Color), Hammer Pin, Hammer Spring, Magazine Catch, Magazine Catch Button, Magazine Catch Spring, Pistol Grip (A2 style), Pistol Grip Lock Washer, Pistol Grip Screw, Pivot Pin, Pivot Pin Detent, Pivot Pin Detent Spring, Selector, Selector Detent, Selector Detent Spring, Takedown Pin, Takedown Pin Detent, Takedown Pin, Detent Spring, Traditional Trigger (Black in Color), Trigger Guard, Trigger Guard Roll Pin, Trigger Pin, Trigger Spring.



Aero Precision lower

AR15 Gen 2 Stripped Lower Receiver is the perfect base for your custom AR15 build. Machined to mil-spec dimensions, our lowers work with standard AR15 components and ensure the highest quality with a correct component interface.

Gen 2 Improvements:

  • Upper Tension Screw - Allows users to fine tune the fit of the upper and lower receiver through the use of a nylon tipped tensioning set screw inserted in the grip tang of the lower receiver. This provides a tight fit with any standard AR15 upper receiver.
  • Increased Magwell Flare - Allows for easier insertion of magazines and provides a sleeker look.

Standard Features:

  • Platform: AR15
  • Material: Machined from 7075-T6 forged aluminum
  • Coating: Matte black hard-coat anodized Mil 8625 Type 3 Class 2
  • Markings: "Cal Multi"
  • Works with standard AR15 components and magazines
  • Rear takedown pin detent hole is threaded for a 4-40 set screw
  • Weight: 8.35oz


  • Stripped AR15 Lower Receiver, Gen 2
  • Nylon tipped tensioning set screw


Anderson closed trigger

Anderson Manufacturing AM15 multiple caliber marked Lower Receivers. These are quality Lower Receivers machined from a 7075-T6 Forging. Mil-spec Dimensions and Hard coat anodized a deep black finish.




Anderson Manufacturing lower

Anderson manufacturing stripped, semi-auto, lower receiver delivers custom shop quality without the typical custom shop price. Perfect platform for building the ultimate, mission-specific, AR-15 rifle or carbine. Made from a high-strength, 7075 T6 aluminum forging for reliable performance and outstanding durability. Mil-Spec, hard anodized finish adds extra strength to the receiver walls and delivers superior abrasion-resistance for rugged field use. Precision-machined to ensure drop-in installation of Mil-Spec, aftermarket components.




The "Shark" muzzle brake is designed with an aggressive profile and 6 short prongs for a unique look. It has a total of 8 ports to redirect pressure, resulting in less muzzle rise and overall recoil. Constructed of CNC machined 4150 steel and finished with Black Oxide



  • Solid 4150 steel construction
  • Black Oxide finish
  • Shark design with 8 ports
  • Length: 2.8125"
  • 1/2"x28 thread pitch
  • Fits: AR-15



The "Phantom" muzzle brake has a unique profile with four large ports designed to reduce recoil and muzzle climb. It's constructed of solid 4150 steel and finished in Black Oxide.



  • Solid 4150 steel construction
  • Black Oxide finish
  • Phantom with 4 long slots
  • Length: 2.25"
  • 1/2"x28 thread pitch
  • Fits: AR-15


30rd AR Mags


Blacked Stainless
Anti-Tilt Follower
Heat Treated


Contact Us Today!

KNR Gunsmithing
Springville, Utah


Phone: (801)491-7481

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