Which is better in an AR-15 - Direct Impingement vs. Gas Piston Operation?
30:14
Why Everyone Needs An AR-15
22:42
Which barrel length is best for an AR-15? We perform the ultimate tests.
8:34
Como funciona um AR-15
5:35
DI vs Short Stroke Gas Piston - Thermal Analysis
8:00
Colt commando, M4 police trade-in upper. Hub city outdoors, Chest rig overview.
19:45
Piston Driven vs Direct Impingement
1:02:15
Ep. 256 | DI vs. Piston-Driven AR’s – What’s Better?
12:36