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Lower Receivers Parts

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A2 Pistol Grip Screw for AR15 / M16

Lower Receivers Parts

Part Number: AN501D416-18

$0.95
A2 Pistol Grip Screw for AR15 / M16

A2 Pistol Grip Screw for AR15 / M16

$0.95

A black phosphated Allen Head Pistol Grip Screw - use a long 3/16” Allen wrench for installation.


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Aluminum Trigger Guard Assembly for AR15 / M16
Aluminum Trigger Guard Assembly for AR15 / M16

Lower Receivers Parts

Part Number: 8448587

$6.95
Aluminum Trigger Guard Assembly for AR15 / M16

Aluminum Trigger Guard Assembly for AR15 / M16

$6.95

A high quality, machined aluminum trigger guard with spring loaded detent already installed. Black anodize finish - much stronger than plastic types. How to Install


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Aluminum Trigger Guard Parts Kit for AR15 / M16

Lower Receivers Parts

Part Number: KIT-TRIGGUARD-ALUM

$7.25
Aluminum Trigger Guard Parts Kit for AR15 / M16

Aluminum Trigger Guard Parts Kit for AR15 / M16

$7.25

If you broke the old plastic trigger guard on your AR in last winter’s cold, or just want to upgrade to the strength and beauty of an aluminum piece, this is the kit. Includes a finely machined black anodized aluminum trigger guard with a spring loaded detent pin already installed. A new steel ¼ X 5/8 spring pin is included.


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AR15 Disconnector

Lower Receivers Parts

Part Number: 8448635-AR

$5.95
AR15 Disconnector

AR15 Disconnector

$5.95

A high quality part of the all important trigger group,this precision machined steel Disconnector will fit and function in your AR15 Lower Receiver perfectly. Finished in Black Manganese Phosphate for protection against rust and corrosion.


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AR15 Hammer with J-Pin

Lower Receivers Parts

Part Number: 9349110-AR

$15.95
AR15 Hammer with J-Pin

AR15 Hammer with J-Pin

$15.95

This high quality example of the standard AR15 Hammer is precision machined before being finished in Black Manganese Phosphate, and includes the J-Pin.


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AR15 Safety Selector

Lower Receivers Parts

Part Number: 9381367-AR

$9.95
AR15 Safety Selector

AR15 Safety Selector

$9.95

This Safety Selector Lever is precision machined from quality steel for perfect fit and function in your AR15 Lower Receiver, and final finished in Black Manganese Phosphate. Don’t take chances with a questionable Safety in your rifle - upgrade to the best from Windham Weaponry.


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AR15 Trigger

Lower Receivers Parts

Part Number: 8448592-AR

$12.95
AR15 Trigger

AR15 Trigger

$12.95

This high quality AR15 pattern Trigger is precision machined before being finished in Black Manganese Phosphate. Then, its ground with a sharp release lip for smooth take up and a crisp release.


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Arms Unlimited Ambidextrous Magazine Catch for AR-15 / M16
Arms Unlimited Ambidextrous Magazine Catch for AR-15 / M16

Lower Receivers Parts

Part Number: AMBI-MAG-CATCH-AU

$34.95
Arms Unlimited Ambidextrous Magazine Catch for AR-15 / M16

Arms Unlimited Ambidextrous Magazine Catch for AR-15 / M16

$34.95

Both right and left hand shooters can get faster, easier reloads while keeping the rifle on target. This distinctive design that is the same size and configuration as the factory part; won't snag, resists accidental release and does not interfere with rifle function but allows you to activate the magazine release with the thumb of the non-firing...


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Bolt Catch for AR15 / M16

Lower Receivers Parts

Part Number: 8448628

$7.95
Bolt Catch for AR15 / M16

Bolt Catch for AR15 / M16

$7.95

A high quality, steel Bolt Catch with black phosphate finish -replace that worn catch for safe rifle operation.


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Bolt Catch Parts Kit for AR15 / M16

Lower Receivers Parts

Part Number: KIT-BOLTCAT

$9.95
Bolt Catch Parts Kit for AR15 / M16

Bolt Catch Parts Kit for AR15 / M16

$9.95

These high quality Windham Weaponry original parts will restore your rifle’s Bolt Catch operation to new  Standards. The high quality steel Bolt Catch, and machined steel Bolt Catch Plunger are in black phosphate finish, and the high tensile strength coil spring will provide long life. A new steel spring pin is provided.


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Bolt Catch Plunger for AR15 / M16

Lower Receivers Parts

Part Number: 8448634

$1.95
Bolt Catch Plunger for AR15 / M16

Bolt Catch Plunger for AR15 / M16

$1.95

A quality machined steel Bolt Catch Plunger in black phosphate finish.


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Bolt Catch Plunger Spring for AR15 / M16

Lower Receivers Parts

Part Number: 8448633

$0.50
Bolt Catch Plunger Spring for AR15 / M16

Bolt Catch Plunger Spring for AR15 / M16

$0.50

A high quality replacement for your worn Bolt Catch Plunger Spring - high tensile strength spring wire.


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Bolt Catch Spring Pin for AR15 / M16

Lower Receivers Parts

Part Number: MS16562-119

$0.50
Bolt Catch Spring Pin for AR15 / M16

Bolt Catch Spring Pin for AR15 / M16

$0.50

The 3/32” x 1/2” steel Spring Pin designed to hold the Bolt Catch solidly in place.


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CMC Tactical Curved Trigger 3.5 Pound Pull Single Stage Trigger for AR platform rifles
CMC Tactical Curved Trigger 3.5 Pound Pull Single Stage Trigger for AR platform rifles

CMC Tactical Curved Trigger 3.5 Pound Pull Single Stage Trigger for AR platform rifles

$179.95

This CMC Tactical Trigger Group is a completely self contained, 100% drop-in fire control group upgrade for the AR-15, LR-308 and AR-10 rifles. The double patented Tactical Flat Trigger design yields truly remarkable and unprecedented trigger control, trigger feel and accuracy, while also the retaining the rugged reliability of a Mil-Spec trigge...


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Complete Lower Receiver Parts Kit for AR15

Lower Receivers Parts

Part Number: KIT-LOWER-AR

$68.95
Complete Lower Receiver Parts Kit for AR15

Complete Lower Receiver Parts Kit for AR15

$68.95

This complete Windham Weaponry Lower Receiver Parts Kit will give you everything needed to build up a stripped Lower, or keep your AR functioning in the toughest conditions. All highest quality parts, this kit includes: AR Hammer with J-Pin; Hammer Spring; AR Safety Selector Lever; Safety Detent; Safety Detent Spring; Bolt Catch; Bolt Catch Spri...


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Dead On Arms Pinless Trigger Guard for AR15 / M16
Dead On Arms Pinless Trigger Guard for AR15 / M16

Lower Receivers Parts

Part Number: 8448587-DOA

$21.50
Dead On Arms Pinless Trigger Guard for AR15 / M16

Dead On Arms Pinless Trigger Guard for AR15 / M16

$21.50

This replacement, oversize trigger guard for the AR15 / M16 eliminates the need for driving pins into the lowers receiver to install trigger guard, and possibly damaging it. Internal, spring loaded detents allow quick, snap in installation, and the oversized guard allows greater clearance for finger - especially when gloved. Machined from type 3...


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Disconnector Spring for AR15

Lower Receivers Parts

Part Number: 8448594

$0.50
Disconnector Spring for AR15

Disconnector Spring for AR15

$0.50

If you are replacing the Trigger Spring on your rifle, replace the Disconnector Spring as well. High quality, high tensile strength spring wire.


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Elftmann Drop-In Match Trigger for AR15 / M16
Elftmann Drop-In Match Trigger for AR15 / M16

Lower Receivers Parts

Part Number: 8448592-ELF

$249.00
Elftmann Drop-In Match Trigger for AR15 / M16

Elftmann Drop-In Match Trigger for AR15 / M16

$249.00

The ELF Drop-In Single Stage Match Trigger has been built for performance. The only AR-15 trigger using aerospace grade sealed bearings, making for an incredibly smooth and fast trigger pull. Pull weight is so easy to adjust it can be done in seconds without removing the trigger from your lower receiver. It fits any mil-spec AR-15, and is design...


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Fire Control Parts Kit for AR15

Lower Receivers Parts

Part Number: KIT-FIRECONTROL-AR

$44.95
Fire Control Parts Kit for AR15

Fire Control Parts Kit for AR15

$44.95

Here are all the critical Windham Weaponry Fire Control Parts Kit necessary to keep your AR ready for the range. This high quality parts kit includes: AR Hammer with J-Pin; Hammer Spring; AR Safety Selector Lever; AR Trigger; Trigger Spring; AR Disconnector and Disconnector Spring. Keep a set of these essential spares in your rifle case for emer...


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Geissele 2 Stage (G2S) Trigger for AR15
Geissele 2 Stage (G2S) Trigger for AR15

Lower Receivers Parts

Part Number: 8448592-G2S

$165.00
Geissele 2 Stage (G2S) Trigger for AR15

Geissele 2 Stage (G2S) Trigger for AR15

$165.00

A complete, High-Quality Trigger System for unique operating environments, the Geissele 2 Stage (G2S) Trigger, semi-auto-only, drops into your AR-15 to give the performance and reliability of Geissele quality triggers at an economical price. Features a 4½ lb. total pull weight, non-adjustable sear engagement, and a 2½ lb. first stage. Made of fi...


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Hammer / Trigger Pin for AR15

Lower Receivers Parts

Part Number: 8448609

$1.25
Hammer / Trigger Pin for AR15

Hammer / Trigger Pin for AR15

$1.25

Black finished, machined Steel Pin for either the Hammer or Trigger in the Lower Receiver (2 required per rifle, sold individually).


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Hammer Spring for AR15

Lower Receivers Parts

Part Number: 8448611

$1.50
Hammer Spring for AR15

Hammer Spring for AR15

$1.50

A high quality Hammer Spring is critical in the AR15 for proper function and dependable ignition - this high quality Spring will deliver both.


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Lower Receiver Parts Kit Less Fire Control Parts for AR15

Lower Receivers Parts

Part Number: KIT-BUILDER

$29.95
Lower Receiver Parts Kit Less Fire Control Parts for AR15

Lower Receiver Parts Kit Less Fire Control Parts for AR15

$29.95

This Windham Weaponry Lower Parts Kit was designed to give the AR Builder everything needed for those who want to add their own custom trigger & hammer. Assembled from all highest quality parts, this kit includes: AR Safety Selector Lever; Safety Detent; Safety Detent Spring; Bolt Catch; Bolt Catch Spring Pin; Bolt Catch Plunger; Bolt Catch ...


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Magazine Catch Button for AR15 / M16

Lower Receivers Parts

Part Number: 8448636

$3.50
Magazine Catch Button for AR15 / M16

Magazine Catch Button for AR15 / M16

$3.50

Solid aircraft aluminum, finely machined Magazine Catch Button - black anodized finish.


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Magazine Catch for AR15 / M16

Lower Receivers Parts

Part Number: 8448638

$4.95
Magazine Catch for AR15 / M16

Magazine Catch for AR15 / M16

$4.95

Machined steel with crisp threading and proper dimensions to ensure even the heaviest magazines are properly retained in the mag well. Black phosphate finish.


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Magazine Catch Parts Kit for AR15 / M16

Lower Receivers Parts

Part Number: KIT-MAGCAT

$7.95
Magazine Catch Parts Kit for AR15 / M16

Magazine Catch Parts Kit for AR15 / M16

$7.95

New original Windham Weaponry parts to replace the malfunctioning mag catch on your rifle - a black phosphate finished Magazine Catch with a black anodized aluminum Mag Catch Button and a new, high tensile strength coil spring are easily installed to properly retain the magazine.


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Magazine Catch Spring for AR15 / M16

Lower Receivers Parts

Part Number: 8448637

$0.50
Magazine Catch Spring for AR15 / M16

Magazine Catch Spring for AR15 / M16

$0.50

High tensile strength steel wire Magazine Catch Spring to help retain the magazine under rough conditions and thousands of cycles.


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Magpul B.A.D. (Battery Assist Device) Lever for AR15 / M16
Magpul B.A.D. (Battery Assist Device) Lever for AR15 / M16

Lower Receivers Parts

Part Number: MAG980

$29.95
Magpul B.A.D. (Battery Assist Device) Lever for AR15 / M16

Magpul B.A.D. (Battery Assist Device) Lever for AR15 / M16

$29.95

The Magpul B.A.D. (Battery Assist Device) Lever is designed to improve the speed and efficiency of the AR15/M16 bolt catch It addresses reloading and malfunction clearance shortcomings of AR15/M16 platforms by extending a paddle to the right side of the weapon - allowing manipulation of the bolt stop from the fire control/ready position with the...


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Most Wanted Parts Kit for AR15 / M16
Most Wanted Parts Kit for AR15 / M16

Lower Receivers Parts

Part Number: KIT-MOSTWANTED

$14.95
Most Wanted Parts Kit for AR15 / M16

Most Wanted Parts Kit for AR15 / M16

$14.95

Here are all those critical little parts that seem to go missing when you’re working on your rifle - the ones that pop out of sight under the bench, into your tool drawer - you know what we mean! Included in the "Most Wanted Kit" are: Pivot Pin Detents (4); Pivot Pin Detent Springs (4); Safety Detents (2); Safety Detent Springs (2); Firing Pin R...


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Pistol Grip Parts Kit for AR15 / M16

Lower Receivers Parts

Part Number: KIT-PISTOLGRIP-A2

$6.50
Pistol Grip Parts Kit for AR15 / M16

Pistol Grip Parts Kit for AR15 / M16

$6.50

Problems with an existing grip on your AR? The Windham Weaponry A2 Pistol Grip Kit is the easy and complete solution. This standard A2 Black Pistol Grip features checkered side panels, forward finger ridge and serrated back strap. They are molded from a Nylon 6/6 resin enhanced to improve toughness, impact resistance and heat stability. The Grip...


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Pistol Grip Washer for AR15 / M16

Lower Receivers Parts

Part Number: MS35335-61

$0.50
Pistol Grip Washer for AR15 / M16

Pistol Grip Washer for AR15 / M16

$0.50

Use a new External Tooth Lock Washer to help lock the Pistol Grip Screw in place.


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Pivot Pin for AR15 / M16

Lower Receivers Parts

Part Number: 8448621

$3.95
Pivot Pin for AR15 / M16

Pivot Pin for AR15 / M16

$3.95

A machined steel Pivot Pin with black phosphate finish - this pin is held "captive” within the Lower Receiver by its spring tensioned detent so as to avoid loss when separating the Upper & Lower.


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POF Ambidextrous Safety for AR15 / M16
POF Ambidextrous Safety for AR15 / M16

Lower Receivers Parts

Part Number: AMBI-SFTY-AR

$24.95
POF Ambidextrous Safety for AR15 / M16

POF Ambidextrous Safety for AR15 / M16

$24.95

Through our partnership with Patriot Ordnance, Windham Weaponry can now offer their high quality ambidextrous safety. These black nitride finished steel parts are machined to close tolerances for crisp operation of the safety mechanism from either side of the receiver. An easy installation for any AR15 that will enhance the safe handling of your...


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Safety Selector Detent for AR15 / M16

Lower Receivers Parts

Part Number: 8448631

$0.95
Safety Selector Detent for AR15 / M16

Safety Selector Detent for AR15 / M16

$0.95

If you have any Safety Selector function issues, your rifle may not be safe! Replace with this quality Safety Selector Detent to be sure.


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Take Down / Pivot Pin Detent for AR15 / M16

Lower Receivers Parts

Part Number: 8448585

$0.50
Take Down / Pivot Pin Detent for AR15 / M16

Take Down / Pivot Pin Detent for AR15 / M16

$0.50

These Detents help retain and position both the Take Down & Pivot Pins in the Lower Receiver - 2 required per rifle.


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Take Down / Pivot Pin Detent Springs for AR15 / M16

Lower Receivers Parts

Part Number: 8448586

$0.50
Take Down / Pivot Pin Detent Springs for AR15 / M16

Take Down / Pivot Pin Detent Springs for AR15 / M16

$0.50

Springs for both the Take Down & Pivot Pin Detents in the Lower Receiver - 2 required per rifle.


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Take Down Pin for AR15 / M16

Lower Receivers Parts

Part Number: 8448584

$3.95
Take Down Pin for AR15 / M16

Take Down Pin for AR15 / M16

$3.95

Like its partner - the Pivot Pin, the Take Down Pin locks the Upper & Lower Receivers together, and is held "captive” within the Lower by its spring tensioned detent to avoid loss. Machined steel with black phosphate finish.


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Trigger Guard Spring Pin for AR15 / M16

Lower Receivers Parts

Part Number: MS16562-129

$0.50
Trigger Guard Spring Pin for AR15 / M16

Trigger Guard Spring Pin for AR15 / M16

$0.50

This steel Spring Pin (1/8” x 5/8” dimensions) locks the Trigger Guard into the rear tabs of the Lower Receiver.


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Trigger Spring for AR15 / M16

Lower Receivers Parts

Part Number: 8448593

$0.95
Trigger Spring for AR15 / M16

Trigger Spring for AR15 / M16

$0.95

A high quality Trigger Spring to help restore proper trigger pull and function in your rifle.


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Troy Ambidextrous Magazine Release for AR15/M16
Troy Ambidextrous Magazine Release for AR15/M16

Lower Receivers Parts

Part Number: AMBI-MAG-CATCH

$65.00
Troy Ambidextrous Magazine Release for AR15/M16

Troy Ambidextrous Magazine Release for AR15/M16

$65.00

The Troy Industries Ambidextrous Magazine Release replicates the feel and length of a standard magazine release button but also accommodates left-handed shooters and one-handed magazine changes. This magazine release is constructed of rugged machined billet tool steel, finished in Black Manganese Phosphate, and is designed to replace the standar...


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