CMMG Radially Delayed Blowback (RDB) Info (initially marketed as the ‘Guard’)
My 9mm CMMG RDB Setup – Updated 12/2021

9mm and .40SW CMMG RDB Ejector Spring info / issues

MEAN Arms Endomags for the CMMG RDB

Mods for 9mm CMMG RDB to work with UN-modified Colt mags

9mm CMMG RDB Buffer / Spring Testing and tuning OLD REFERENCE DATA

.40 SW CMMG RDB Setup 

 .45 ACP CMMG RDB Setup

Buffer Information

My Take on the A5 System

Vltor A5 buffer tube vs PSA PA-10 and Carbine tube

7.62x39mm Configurations

5.45x39mm Configurations

Teal Blue Bravo’s PDQ Ambi bolt Release on MGI Magwell

RMW Extreme .45ACP Gas Operated Upper with MGI .45 GG Magwell

  22LR M16 Info

Old 9mm M16 info