SPECS
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. Internal size: ~1.375″
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)
