Description
Description
Important Notice
If you have purchased a cup IE, the “Receiver,” a barrel cannot be sent to you until an approved form 1 is received. It is not being sold as a registered destructive device. The M29A1 Mortar Cup, which is the receiver, must be shipped to an FFL licensee within your state. The cup will transfer as a standard Title 1 firearm receiver, no different than a standard rifle, shotgun, or handgun. You will go to your dealer and fill out the standard 4473 over-the-counter firearms transaction record. Once the receiver is in your possession, you must fill out and submit Form 1 (application to make and register an NFA firearm) to the BATFE, requesting permission to make a destructive device. Once you have received the approved Form 1 back from the ATF, you will provide us a copy of the Form 1 for our records. We will then send you the barrel (If purchased).
Must ship to an FFL license, as a Title 1 firearm receiver (no NFA transfer tax or paperwork required to go to FFL dealer). Be advised that it is a violation of ATF/NFA rules to possess a compatible 81mm cup (receiver) and a 81mm tube (barrel) at the same time without an ATF approved Form 1 or Form 4 for the 81mm mortar (or have a Type 10 Federal Firearms License) a barrel cannot be sent until an approved form 1 is received. See our terms and conditions for more information.
Product Overview
Restore or complete your 81mm mortar system with our newly manufactured 81mm M29A1 Mortar Cup (Receiver), precision CNC-machined from 4041 steel and finished with a durable manganese parkerized coating. Manufactured to mil-spec standards, this receiver is engineered for correct fit, strength, and long-term service life, making it suitable for restoration projects, live-fire mortar systems, and historically accurate builds.
Historical Significance
The U.S. M29 81mm mortar entered service in the early 1950s as a post-World War II successor to the earlier M1 mortar. While the M1 traced its lineage directly to the French Brandt mle 27/31—the design that became the foundation for nearly all Western 81mm mortars—the M29 represented a refinement of that proven concept for Cold War-era infantry warfare.
The M29 system improved portability and handling while preserving the ballistic performance that made the 81mm mortar the backbone of U.S. infantry indirect fire support. It saw extensive service during the Korean War and Vietnam War, where reliability, sustained fire capability, and ease of maintenance were critical.
The M29A1 variant introduced refinements intended to improve durability and service life under sustained training and operational use. At the heart of the system is the mortar cup (receiver), which houses the firing pin assembly and absorbs repeated firing stresses. Correct metallurgy, machining tolerances, and surface treatment are critical to the longevity standards that this receiver is built to meet.
Precision Manufacturing & Materials
This M29A1 mortar cup is CNC machined from 4041 steel, selected for its strength, toughness, and resistance to fatigue under repeated firing cycles. Each receiver is produced to military specifications to ensure proper interface with M29A1 components.
A manganese parkerized finish is applied for corrosion resistance and durability, matching the traditional U.S. military finish used on original mortar components. This coating provides a matte, non-reflective surface consistent with historical military production.
Key Features
- Model: M29A1 Mortar Cup / Receiver
- Material: CNC machined from 4041 steel
- Finish: Manganese parkerization
- Manufacturing Standard: Mil-spec tolerances and construction
- Application: Restoration, replacement for live-fire mortar systems
Why Choose This M29A1 Mortar Cup?
Whether you are restoring an original U.S. 81mm M29 mortar, replacing a worn receiver, or assembling a historically accurate live-fire system, this new-made M29A1 mortar cup delivers the correct balance of authenticity, strength, and modern manufacturing precision. Built to military standards and finished in the proper parkerized coating, it is a dependable core component for any serious mortar project.
Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item’s general condition. The item you receive might be slightly better, or worse, condition than was shown in the pictures.
See our Terms and Conditions here.
