Home > Accessories > AR Parts > Lower Receiver
Sort By:
Page of 2
ATI AR-15 Pistol Grip Screw + Star Lock Washer ATI AR-15 Pistol Grip Screw + Star Lock Washer

Use for a new build or as a replacement for that frustrating OEM flat head screw.

Our Price: $2.99
LBE Unlimited Castle Nut LBE Unlimited Castle Nut

LBE Castle Nut machined from 4140 steel with a manganese phosphate coating. Made in USA.

List Price: $8.99
Our Price: $7.50
Savings: $1.49
Magpul MOE Trigger Guard Magpul MOE Trigger Guard

The MOE Trigger Guard (Magpul Original Equipment) is an enhanced polymer drop in replacement for the AR15/M4 weapons platform. It features a shallow "V" shape for better use of gloves in tactical shooting or cold weather operations.

List Price: $8.95
Our Price: $8.50
Savings: $0.45
Strike Industries AR Enhanced Bolt Catch Strike Industries AR Enhanced Bolt Catch

The Enhanced Bolt Catch is another piece in a line of high quality parts for the AR15 from Strike Industries. The SI AR-EBC features an extra wide bolt catch lever surface making its operation effortless. Its solid construction and clean matte black finish make it a great looking replacement or build project. It’s a great value for an essential item. If you need the parts to keep your AR in top shape, look no further than Strike Industries.

List Price: $13.95
Our Price: $12.00
Savings: $1.95
Strike Industries AR15 Anti-Walk Pins Strike Industries AR15 Anti-Walk Pins

The SI anti-rotation/anti-walk pin kit adds an extra degree of security to prevent your pins from walking out under fire or harsh use. Tool-less installation and disassembly allows for ease of maintenance, with no small screws to back out or become lost.

List Price: $14.95
Our Price: $12.95
Savings: $2.00
Strike Industries Mag Catch - Black Strike Industries Mag Catch - Black

The Strike Billet Magazine Catch Assembly features a billet magazine release button. Sculpted from a solid piece of 6061 aluminum, the button offers a functional and aesthetic upgrade to your AR. Deep serrations and ergonomic shape facilitates positive engagement and identification even in the dark or adverse conditions. The blind thread and color anodized options provide for a unique, custom look.

List Price: $14.95
Our Price: $13.95
Savings: $1.00
Strike Industries Mag Catch - Blue Strike Industries Mag Catch - Blue

The Strike Billet Magazine Catch Assembly features a billet magazine release button. Sculpted from a solid piece of 6061 aluminum, the button offers a functional and aesthetic upgrade to your AR. Deep serrations and ergonomic shape facilitates positive engagement and identification even in the dark or adverse conditions. The blind thread and color anodized options provide for a unique, custom look.

List Price: $16.95
Our Price: $15.95
Savings: $1.00
Strike Industries Mag Catch - FDE Strike Industries Mag Catch - FDE

The Strike Billet Magazine Catch Assembly features a billet magazine release button. Sculpted from a solid piece of 6061 aluminum, the button offers a functional and aesthetic upgrade to your AR. Deep serrations and ergonomic shape facilitates positive engagement and identification even in the dark or adverse conditions. The blind thread and color anodized options provide for a unique, custom look.

List Price: $16.95
Our Price: $15.95
Savings: $1.00
BCM Gunfighter M4 Receiver End Plate w/QD Sling Mount BCM Gunfighter M4 Receiver End Plate w/QD Sling Mount

BCM Gunfighter prides itself on its quality, American-made products. This QD End Plate is the perfect addition to your AR platform build. This end plate is machined from high-strength steel and features a quick detach sling mount.

List Price: $20.00
Our Price: $17.00
Savings: $3.00
Strike Industries Carbine Flat Wire Spring Strike Industries Carbine Flat Wire Spring

The Strike Industries Carbine Flatwire Spring is an economical, easy upgrade to any AR system with a carbine buffer system. The flatwire spring increases service life of the platform, smooths out the shooting cycle and greatly outlasts the stock spring. Increased bolt load, in addition to decreased compressing force, increases reliability in cycling and makes shooting more comfortable. At a cost not much greater than stock carbine springs, the SI Flatwire is an easy option for those either looking to replace worn buffer springs or begin new builds.

List Price: $19.95
Our Price: $17.95
Savings: $2.00
Hogue 15 Degree Polymer Grip - FDE Hogue 15 Degree Polymer Grip - FDE

Hogue 15 degree vertical polymer grip is the lightest AR pistol grip available weighing a mere 1.6 oz. The grip has a hollow interior for lightweight efficiency. It is molded from durable polymer to provide many years of dependable service.

List Price: $19.00
Our Price: $18.00
Savings: $1.00
Ascend Armory Enhanced Takedown/Pivot Pins Ascend Armory Enhanced Takedown/Pivot Pins

Ascend Armory comprises a collection of people that dedicate themselves to the art of making extreme quality AR platform parts. Their attention to detail is evident in their products construction and finish. The Ascend Armory Enhanced Takedown/Pivot Pins are a must-have for your next AR build or as a replacement for your stock pins. Made of stainless steel and finished in black nitride, these pins offer more surface area to make it easier to take down your AR for easier cleaning and modifications.

List Price: $19.95
Our Price: $18.50
Savings: $1.45
Elftmann Anti-walk Trigger/Hammer Pins - Black Elftmann Anti-walk Trigger/Hammer Pins - Black

Elftmann AR-15 Non-Rotating Anti-walk Trigger and Hammer Pins

List Price: $24.95
Our Price: $20.95
Sale Price: $18.95
Savings: $6.00
Strike Industries AR15 Shift Pins Strike Industries AR15 Shift Pins

The Strike Industries Shift Pins bring yet another innovative solution to the AR15 market. Already keeping the extended grip surface for easy disassembly without a need for a pin punch, the pins are also designed with Quick Detach mechanisms that result in not needing to remove your stock assembly (endplate, castle nut, buffer tube, etc.). Simply rotate and remove. The SI Shift Pin is CNC machined from solid steel for strength, precision fit and corrosion resistance. This is a replacement for the standard AR15/M16/M4 takedown pins and fits most AR standard and billet receivers.

List Price: $21.95
Our Price: $18.95
Savings: $3.00
Ascend Armory Mod 2 QD End Plate Ascend Armory Mod 2 QD End Plate

Ascend Armory comprises a collection of people that dedicate themselves to the art of making extreme quality AR platform parts. Their attention to detail is evident in their products construction and finish. The Ascend Armory Mod 2 QD End Plate is a must-have for your next AR build or as an addition to your current platform. Made of 6000 series aluminum and anodized black, this end plate incorporates a QD point that is angled at 20 degrees for easier QD removal.

List Price: $21.99
Our Price: $19.00
Savings: $2.99
Strike Industries AR10 Flat Wire Spring Strike Industries AR10 Flat Wire Spring

The Strike Industries AR10 Flatwire Spring is an economical, easy upgrade to any .308 AR system. The flatwire spring increases service life of the platform, smooths out the shooting cycle and greatly outlasts the stock spring. Increased bolt load, in addition to decreased compressing force, increases reliability in cycling and makes shooting more comfortable. At a cost not much greater than stock carbine springs, the SI Flatwire is an easy option for those either looking to replace worn buffer springs or begin new builds.

List Price: $21.95
Our Price: $19.95
Savings: $2.00
B5 Systems Polymer Trigger Guard B5 Systems Polymer Trigger Guard

Designed by B5 Systems with cold weather and tactical operations in mind, this polymer trigger guard also has a swing-down feature for use with heavier winter gloves.

List Price: $22.00
Our Price: $20.00
Savings: $2.00
CMMG MK3 Takedown and Pivot Pins for AR-308 CMMG MK3 Takedown and Pivot Pins for AR-308

CMMG improved pins are slightly longer to make take down much faster and easier. The ends have a divot to allow the use of a bullet tip without the fear of slipping.

List Price: $24.95
Our Price: $20.00
Savings: $4.95
Hogue Beavertail Grip for AR15/M16 Hogue Beavertail Grip for AR15/M16

The Hogue Overmolded Beavertail pistol grip combines the durability of a fiberglass core with the comfort of rubber over-molding. The palm swells and finger grooves improve the comfort over the standard AR15 grip and the unique texture ensures a solid grip in any condition.

List Price: $29.95
Our Price: $22.00
Savings: $7.95
Aero Precision AR15 Lower Parts Kit Minus FCG/Pistol Grip Aero Precision AR15 Lower Parts Kit Minus FCG/Pistol Grip

This Aero Precision AR15/M4 lower parts kit helps you build a custom AR15 from the ground up. Mil-spec dimensions and coating ensure the highest quality and correct component interface.
This lower parts kit does not include the fire control group or pistol grip.

List Price: $24.99
Our Price: $24.00
Savings: $0.99
LBE Mil-Spec Buffer Tube LBE Mil-Spec Buffer Tube

LBE Unlimited receiver extension tube for AR15/M16 & AR308 rifles. Features aluminum construction with a matte black anodized finish, six precision-machined notches to securely grip the adjustable stock locking pin.

List Price: $29.99
Our Price: $25.99
Savings: $4.00
SI Multi-Function Endplate + Castle Nut - Black SI Multi-Function Endplate + Castle Nut - Black

The Strike Industries Multi-Function End Plate and Anti-Rotation Castle Nut are designed to update and upgrade the often neglected castle nut and endplate system. With the vast amount of aftermarket support for the AR system today, SI felt that there was a need for a secure system as adaptive as the shooter. This endplate and castle nut system offers an anti-rotational QD socket and sling loops built in.  The Anti-Rotation Castle Nut is specifically designed to work with this Multi-Function Endplate.  Instead of peening the endplate to secure the castle nut, a set screw fulfills this function to allow for multiple uses as you upgrade or update your build.

List Price: $28.95
Our Price: $26.95
Savings: $2.00
Magpul ASAP Magpul ASAP

The ASAP Ambidextrous Sling Attachment Point allows a range of motion greater than 180 degrees, enabling true ambidextrous weapon manipulation for both left and right handed shooters. The ASAP replaces the standard AR15/M4 carbine stock receiver end plate, providing a tactical advantage by minimizing sling snagging and facilitating easy transition to and from weapon and reaction side shoulders. The ASAP works with one-point type slings with snap hook style attachments such as the Magpul MS3. Made from precision cast black manganese phosphatized steel, the ASAP is compatible with both mil-spec and commercial-spec carbine receiver extensions (buffer tubes). The ASAP has been proven to withstand stress tests of over 300lbs.

List Price: $29.95
Our Price: $27.95
Savings: $2.00
Magpul ASAP-QD End Plate Magpul ASAP-QD End Plate

The ASAP QD (Ambidextrous Sling Attachment Point QD) allows a wide range of motion, enabling true ambidextrous weapon manipulation for both left and right handed shooters. Replacing the standard AR15/M4 carbine stock receiver end plate, the ASAP QD provides a tactical advantage by minimizing sling snagging and facilitating easy transition to and from weapon and reaction side shoulders. The ASAP QD works with one-point type slings with push-button quick disconnect sling swivels such as the MS4 GEN 2. Made from precision cast black Melonite™ finished steel and compatible with both mil-spec and commercial-spec carbine receiver extensions.

List Price: $29.95
Our Price: $28.50
Savings: $1.45
Spike's Tactical Tungsten Buffer Spike's Tactical Tungsten Buffer

If you’re looking to improve the function of your carbine length AR without changing out a ton of parts, there’s an easy answer. All you really need to do to vastly improve the performance of your AR-15 is to upgrade to a Spikes Tactical Buffer. While there are a number of buffers on the market that you might choose, the Spikes Tactical Tungsten Buffers will outperform the competition and are easily one of the most effective single component upgrades you can make to your AR15.
T1 Buffer = $29.95 - T2 Buffer = $34.95 - T3 Buffer = $40.95

List Price: $44.95
Our Price: $29.95
Savings: $15.00
Magpul MIAD Grip Gen 1.1 - Grey Magpul MIAD Grip Gen 1.1 - Grey

The MIAD (MIssion ADaptable) GEN 1.1 Grip is a drop-in replacement for the standard AR15/AR10 grip. It is designed to improve ergonomics with interchangeable front and rear straps for personalized hand fit, an aggressive texture for positive weapon control, and is compatible with all Magpul grip cores to adapt to various storage needs. This update to the original MIAD has improved strap retention and also comes standard with the newest grip core that holds an included 1/2 oz. lubrication bottle.

List Price: $35.95
Our Price: $30.00
Savings: $5.95
KNS Precision Trigger Group Pins - FDE - .154 KNS Precision Trigger Group Pins - FDE - .154

KNS Precision manufactures the STRONGEST pins that can be produced and were designed to withstand the high impact of full and semi-auto 9mm, .223 and 7.62mm suppressed weapons. The pins are stainless steel with the slide plates DuraCoated in FDE.

List Price: $38.00
Our Price: $35.00
Savings: $3.00
Strike Industries Flip Switch - Red Strike Industries Flip Switch - Red

The SI Flip Switch is a lightweight, low profile ambidextrous safety. The Flip Switch features carefully designed ergonomics to facilitate positive, but comfortable engagement and disengagement even when wet despite its compact, low drag size. The SI Red Flip Switch is perfect for those looking to upgrade the aesthetics of their AR.

List Price: $39.95
Our Price: $37.95
Savings: $2.00
FORTIS LE Castle Nut & End Plate System FORTIS LE Castle Nut & End Plate System

When Fortis Manufacturing designed the new Lightweight Enhanced (LE™) Castle Nut & End Plate System, they came up with a system that virtually eliminates the risk of your castle nut ever backing out. They've engineered a solution to install the castle nut onto the end plate that is not only robust, but also stands true to their brand of innovation and ingenuity. The K1 system features a tapered castle nut that seals itself onto the end plate. This ultra precision snug fit allows the castle nut to seat and seal itself into place without the need of staking the end plate. No ratcheting, no set screws, no backing out and no failures.

List Price: $39.95
Our Price: $37.95
Savings: $2.00
Aero Precision M5 Lower Parts Kit Minus FCG/Pistol Grip Aero Precision M5 Lower Parts Kit Minus FCG/Pistol Grip

This Aero Precision M5 (.308) lower parts kit helps you build a custom .308 AR from the ground up. Mil-spec dimensions and coating ensure the highest quality and correct component interface.
This lower parts kit does not include the fire control group or pistol grip.

List Price: $39.99
Our Price: $38.00
Savings: $1.99