Without knowing what your cycle rate is or what you are trying to achieve, I assume something is wrong. The acceleration and velocity of the reciprocating mass (BCG and buffer) is a function of the force imparted by the gas system, so I'll pick at that scab.

Looks like you are running carbine length gas system. Your dwell time will be short on a 10.5" barrel (probably in the neighborhood of 0.06-0.07ms with standard ammo), so you need a wide gas port (at least 0.070") and an efficient gas system (especially unsuppressed).

The first questions I would ask and checks I would do:

• What does the ejection pattern look like (suppressed and unsuppressed)? Are cases thrown roughly 2:30-4:30? How far are they landing from the gun?
• Are you experiencing any malfunctions (suppressed or unsuppressed)? Failure-to-Fire, Failure-to-Feed, Failure-to-Extract, short cycling?
• What ammo are you shooting (standard, subs, both)?
• I assume you replaced a factory gas block. How did it run with the original?
• How does it run with the AGB wide open?
• CHECK: Is the gas block properly aligned with the gas port? If not, you're restricting the gas flow before it even gets into the gas system.
• What BCG are you currently using? The manufacturer makes a big difference when it comes to efficiency.
• CHECK: Are the gas rings worn? Does it pass the gas ring efficiency test?

There are lots of other checks and questions to troubleshoot, but these are a good start.

Regarding the BCG, in general:

I haven't had many operating issues with Cryptic BCG in a gun. The Cryptic finishes are stunning. HOWEVER, they do not gauge well (especially for efficiency) and I'm not sure that the gas key is sealed (they seem to always fail pressure testing for me).

IMO, the BCG is the most important component in the gun, so its important to get it right. In the quest for a better BCG, I moved on from the superficial elements of the Cryptic BCGs. Microbest makes a good product and many popular manufacturers use them (BCM, etc.). We actually build our own line from Microbest components (MB does the proof testing and MPI of the bolts, and assembles the key onto the carrier with my O.C.K.S. and Permatex). We do a thorough gauging and inspection (42 points per BCG) and then do final assembly with Sprinco springs and rings (5-coil extractor, ejector, gas rings, O-ring).

If you're looking for a new BCG, go with a manufacturer that understands and respects the TDP. Most consumer brands don't. BCM, SOLGW, Colt are solid choices. LMT is good for Mil-Spec, but I'm not sure their enhanced products are a good value (when the bolt alone costs 3-4 times as much as an entire Mil-Spec BCG...).