This original new old stock 20mm Rear Buffer Spacer Sleeve (P/N 7226787) is a genuine U.S. military component designed for M3, M24A1, and Mk16 series aircraft and naval autocannons. Assigned National Stock Number (NSN) 1005-00-722-6787, this spacer sleeve is a key structural part in the recoil buffer system of these 20mm cannons, serving to properly align and secure the internal recoil components during high-rate-of-fire operation.
The 20mm M3 aircraft cannon was widely employed by the U.S. military in the post-WWII era, particularly on fighter aircraft such as the F-86 Sabre. Its derivatives, including the M24A1 and the Mk16, continued service through the Cold War and into the Vietnam War. The Mk16 variant in particular, was used by the U.S. Navy as an antipersonnel weapon aboard riverine patrol boats, where its high volume of fire was leveraged in close-quarter engagements along Vietnam’s inland waterways.
The Rear Buffer Spacer Sleeve ensures precise positioning and stability of the buffer components under recoil stress. Its rugged design, manufactured to military specifications, contributes to the reliable cycling and longevity of the weapons platform.
Product Specifications:
Condition: New Old Stock (NOS)
Part Number: 7226787
NSN: 1005-00-722-6787
Compatibility: 20mm M3, M24A1, and Mk16 automatic cannons
Application: Buffer/recoil system alignment component
Historical Significance:
The Mk16 cannon was a notable evolution of the M3 series, adapted for use on fast riverine craft in Vietnam. It provided suppressive firepower during patrol and interdiction missions. This buffer sleeve is part of the assembly that helped control the forces generated by sustained automatic fire, ensuring safe and consistent function.
Ideal For:
Approx length 2", Approx width 1.5", Approx height 1.5", Approx weight .3lbs.
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.
Please visit our page about order lead times here: Order Lead Times