My D&L carbine now has in excess of 20,000 rounds through it.
The D&L Piston carbine has had in excess of 20,000 rounds of ammunition of various makes and loadings fired through it. I do not recall a single instance where the rifle failed to operate as related to the gun's function. The gun has only been used with D&L custom magazines. The weight and balance of the gun is superb and is rock solid under firing conditions given the machined fixed stock. In all of this use, not a single screw, pin, or part has come loose / failed in any way. The after market / non-D&L manufacture trigger group has exhibited reset problems and is to be replaced by USGI parts tuned to DL's specifications. All in all the rifle inspires confidence and confidence is what accurate and effective marksmanship is all about! No better AR platform on the market today!
One drawback to Brennan’s study is that, unlike Kouri’s, there was evidence of attempted deception. Several people had to be excluded from the non-users’ group because they were either definitely on steroids (they failed the urine test), or probably on steroids (in the researchers’ words, they had “implausibly high muscularity and low body fat despite denial of AAS use”). However, even if a couple of users slipped in, they probably didn’t skew the data too much. The sample size for nonusers was big enough (131 people) that a few bad apples wouldn’t spoil the whole bunch, and the researchers were excluding suspiciously jacked people anyways, so if a few users did slip in, they apparently weren’t swole enough to raise any red flags.
In modern physics, light is regarded as the fastest thing in the universe, and its velocity in empty space as a fundamental constant of nature. The speed of light in a vacuum is presently defined to be exactly 299,792,458 m/s (about 186, miles per second). That’s basically the fastest thing the human species has ever experienced today. If you travel around the earth’s equator at the speed of light you will travel around the entire planet earth times in approximately one second. While we have not been able to discover anything faster, there is speculation about superluminal particles – which leads us to number one on the list: