I got this in January and did the conversion my self. (BTW im a machinist. This was easy!) I have only shot it 4 different times. I'm guessing its had around 200rds. through it. I love the gun, but I just don't shoot it enough. It will cycle any shell I've tried. BTW i've done a ton of work to this thing. It would be perfect for hunting Zombies!
-18.25" to end of permanently attached muzzle break (was 24")
-4 gas port barrel w/ polished feed ramp (4x .072 holes)
-Izmash style muzzle break
-modified Tapco G2 trigger/hammer set
- Trigger,hammer, and axis pin were profiled and polished
-Pu