USMGM MG-15E Ambidextrous bolt catch and release
MG-15E lower receiver featuring the patent-pending SAEBR System. The SAEBR System stands for Symmetrical Ambidextrous Ergonomic Bolt catch and Release, and is exclusively for U.S. Mil-Grade MFG's future line of AR-based receivers.
Suggested videos

First ever, AR built-in trigger guard bolt lever. MG-15E lower from USMGM.
Modern Tactical Shooting · 9:32

The AR-15 Lower Finally Evolved | USMGM MG-15E Ambidextrous Lower
Gear And Guns · 8:18

The Best Ambi Lower On The Market - USMGM MG-15E
Focus Clipps · 5:32

The Best Lower On The Market - USMGM MG-15E
gundeals · 8:45

Installing PDQ Ambidextrous Bolt Release on KE Arms KP-15 Lower
Guns, Guns, Gear, and Guns with Geary Gunderson · 7:47

INTRODUCING A Green Beret & Gun Manufacturer, Will Cavner of USMGM @usmilgrade
Warrior Mindset · 15:40

Ambi bolt catch PDQ. Making AR15's less shit
David j Ashcroft, Competitive Shooter & Film Maker · 0:27

USMGM SAEBR LOWER | No Badlever Needed
PNW-REDACTED · 6:41

Who Makes the Best Ambi AR15 Lower?
Clint Morgan · 35:51