Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

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 FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Special offer available for this product. Click here to see!
Government Export Restriction Government Export Restriction
Questions & Answers
What is the J spring do? Is it a California compliance thing? Expert Answer

No, the J-spring is what propels the hammer toward the firing pin.

by Tom B, Gear Expert, November 10, 2021
Customer Reviews
Most Recent Reviews
Luth / enterprises by David, February 24, 2022
quality is spot on , made with milspec material and workmanship ,i would not expect anything less from uncle randy and his company!!Keep putting those fine products on the market and i will keep using them!!!
Most Recent Reviews
Ar15 hammer by Al, Verified Owner, March 19, 2019
The cheap ar15 I could find haven’t had a chance to set it up yet but definitely should be good to go in a couple days then I can leave a better Better description but it has a nice finish and looks tough
Most Recent Reviews
Hammer for AR by G Man, December 31, 2018
Milspec, it is functional, not much else to say. A hammer is a hammer. I’ve yet to install. Bought it as a spare part. This is the same as any other, in stock at the time. So I ordered it. I am writing more because the sightwont let me keep it short....
Read More...
Read All 3 Reviews
In Stock
2 Models Available
Gun Model
All
Search
Click to select this item for your bundle offer!

  • Select a specific model above to see the deal!
  • Luth-AR Disconnector for M16, Black, LR-19A
As low as $26.98
You Save Up to $0.42
OP Bucks$0.69

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Luth-AR Hammer, Mil Spec w/ J Spring

Ideal for modification, the Luth-AR Hammer, Mil Spec w/ J Spring was designed to be the best lower receiver for anybody attempting to improve the quality of their shooting encounters. These AR15 Lower Parts from the industry experts at Luth-AR are made making use of the types of effective and long lasting components you expect to come out of this well-known brand. Right here at OpticsPlanet, it is our mission to make sure you have satisfactory options to purchase the ideal AR15 Lower Parts for all of your expectations, and the Luth-AR Hammer, Mil Spec w/ J Spring is amongst the products that we're thrilled to deliver. Luth-AR has been devoted to building high quality AR15 Lower Parts for an incredibly long time, and the Luth-AR Hammer, Mil Spec w/ J Spring is the final result of their continual endeavors and undivided attention to detail. For an extraordinary option to be sure you are firing using one of the most efficient lower receiver kits the market can offer, discover the Luth-AR Hammer, Mil Spec w/ J Spring.

Specifications for Luth-AR Hammer, Mil Spec w/ J Spring:

Manufacturer: Luth-AR
Color: Black
Caliber: .223 Remington
Gun Make: AR Platform
Gun Type: Rifle
Weight: 0.1 oz
Additional Features: Mil Spec with J Spring
Country of Origin: USA

Package Contents:

  • Luth-AR Hammer, Mil Spec w/ J Spring

Luth-AR Hammer, Mil Spec w/ J Spring Orderable Models

List of Orderable Models

  • Luth-AR Hammer AR15, Mil Spec with J Spring, Black, LR-33K , MPN: LR-33K , UPC: 859819007577 , Code: 3FN-LPK-133LUTH-LR-33K
  • Luth-AR Hammer M16, Mil Spec with J Spring, Black, LR-34K , MPN: LR-34K , UPC: 859819007584 , Code: 3FN-LPK-133LUTH-LR-34K
Compare (0)
Last updated 2026-09-08 UTC.