Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Questions & Answers
Does this come with buffer retainer/spring… it’s in the picture but not the description Expert Answer

The Wilson Combat Lower Receiver Small Parts Kit does not include any fire control parts (Hammer, Trigger, Disconnector, Springs), or the buffer retainer spring. It will only include:
Bolt Catch
Bolt Catch Plunger
Bolt Catch Roll Pin
Bolt Catch Spring
Magazine Catch
Magazine Catch Spring
Magazine Catch Button
Pivot Pin
Takedown pin
2x Pivot/Takedown detents
2x Pivot/Takedown detent springs
Safety Detent
Safety Detent Spring
Semi-auto Safety selector (Right Hand)
Trigger Guard (Aluminum GI)
Trigger Guard Roll Pin
2x Trigger/Hammer Pins

by Ethan, Gear Expert, March 11, 2022
Customer Reviews
Helpful Positive Review
Works well by RangerDoc, November 29, 2019
This kit was generally easy to install. No instructions but as usual YouTube came to the rescue. It is very difficult to install the roller pin that holds the action/ bolt release without marring the left side of the lower receiver. After applying ma...
Read More...
5/5 found this helpful
Helpful Positive Review
There is not much to be said about it except that everything fit like it was supposed to. I installed it in a wilson lower so I figured I would feed it Wilson parts. It ate them with no complaints. I wish I could give a more factual explanation, but ...
Read More...
1/1 found this helpful
Helpful Negative Review
Fit and Finish not good by Latka303, Verified Owner, July 21, 2018
I use this kit on aeroprecision lower and springs for pivot pin will not fit. Also finish is very poor. Had to order aeroprecision kit and decided to remove all parts of Wilson Combat kit. Aeroprecision is 20$ less fits perfect and finish is way much...
Read More...
3/5 found this helpful
Most Recent Reviews
Great parts kit by DR, Verified Owner, April 20, 2025
A great kit. High quality and everything fit well.
Most Recent Reviews
bob the builder by bob, Verified Owner, August 27, 2024
It’s pretty well a standard lower parts kit Would hope for a little more being a 65$kit But it appears that’s just the industry standard
Most Recent Reviews
Very nice kit and well made parts went together with no problems high quality as always from wilson combat
Read All 20 Reviews
3 Models Available
Gun Model
All
Search

Product Info for Wilson Combat Lower Receiver Small Parts Kit

The most commonly used parts to complete a custom AR10/15 rifle and the same parts Wilson Combat use in their shop on custom Billet AR10/15 rifles. These quality parts are built by Wilson Combat's machine shop or USGI contractors to meet or exceed Military Specifications. This kit includes a right hand safety selector.image

Specifications for Wilson Combat Lower Receiver Small Parts Kit:

Manufacturer: Wilson Combat
Color: Assorted
Fabric/Material: Steel/Aluminum
Condition: New

Package Contents:

  • Wilson Combat Lower Receiver Small Parts Kit
  • Bullet Proof Bolt Release AR10/15 Checkered
  • Bolt Catch Plunger
  • Bolt Catch Threaded Screw for Billet Receivers
  • Bolt Catch Spring
  • Magazine Catch
  • Magazine Catch Spring
  • Magazine Catch Button
  • Pivot Pin
  • Takedown Pin
  • 2x Pivot/Takedown detents
  • 2x Pivot/Takedown detent springs
  • Safety Detent
  • Safety Detent pring
  • Semi-auto Safety selector (Right Hand)
  • 2x Trigger/Hammer Pins

Wilson Combat Lower Receiver Small Parts Kit Orderable Models

List of Orderable Models

  • Wilson Combat Small Parts Lower Receiver Kit, AR-15 Billet, TR-LOWERK-B15 , MPN: TR-LOWERK-B15 , UPC: 810025505424 , Code: C0-LPK-LRSPK-TR-LOWERK-B15
  • Wilson Combat Lower Receiver Small Parts Kit, AR-Style, TR-LOWERK , MPN: TR-LOWERK , UPC: 874218006334 , Code: C0-LPK-LRSPK-TR-LOWERK
  • Wilson Combat Small Parts Lower Receiver Kit, AR-10 Billet, TR-LOWERK-10 , MPN: TR-LOWERK-10 , UPC: 810025502324 , Code: C0-LPK-LRSPK-TR-LOWERK-10

Wilson Combat Lower Receiver Small Parts Kit Unavailable & Discontinued Models

List of Unorderable Models

  • USED Wilson Combat Small Parts Lower Receiver Kit, AR-15 Billet, TR-LOWERK-B15, EDEMO1, Used, Condition Like New, Inspect and Rebox , MPN: TR-LOWERK-B15-EDEMO1 , Code: C0-LPK-LRSPK-TR-LOWERK-B15-EDEMO-RE-A
Compare (0)