Mean Arms Bearing Delay Upper Receiver in 9mm | WHAS24

SHOT SHOW 2024, LAS VEGAS, NV – Optimize your AR experience with the Mean Arms Bearing Delay Upper Receiver. This complete upper receiver system, compatible with any AR lower receiver, comes in 5 barrel lengths (4.5″, 7.5″, 11″, 14.5″, 16″) – all threaded for a 1/2-28 muzzle device. No 9mm-specific buffer required; it seamlessly integrates with standard AR-15 buffers. At its core is the innovative ball bearing bolt carrier group (BCG), enhancing lockup in battery and post-firing delay. Customize performance by swapping the Lifter to adjust bearing angles. Our unique center ejector ensures the most consistent ejection in the 9mm AR market. Elevate your firearm with the precision of the Bearing Delay Upper Receiver.


MSRP: $1,500

Caliber: 9×19mm Parabellum

Compatible with both milspec AR-15 and dedicated pistol-magazine lower receivers

Works with standard AR-15 buffers

5 available barrel lengths: 4.5″, 7.5″, 11″, 14.5″ and 16″

Weight of entire Upper (BCG alone is just under 11oz)
4.5″ is 2.59 lbs
7.5″ is 2.92 lbs
11″ is 3.23 lbs
14.5″ is 3.57 lbs
16″ is 3.72 lbs

Each Bearing Delay Upper Receiver includes:

Fully tunable ball bearing bolt carrier group

MA Upper Receiver – slick side billet machined aluminum upper receiver

MA Handguard – free float hybrid metal/polymer design

MA Charging Handle – new ambidextrous design

MA Muzzle Device – exclusive machined design reduces recoil and muzzle flash

Also included with the purchase of the Bearing Delay Upper Receiver:
1. Additional Lifter for tuning the system (2 total included)
2. Ejectorless EndoMags (PMAGs NOT included)

This product carries a MEAN Lifetime Warranty.


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