Not only this stock was adjustable in length but also a straight line stock,even though not aligned to the axis of the bore.A straight line stock help in better control of the rifle,mitigating felt recoil .
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Nice butt, poor shooting technique
.
The stock resting on your upper shoulder is a valid technique if your legs are properly balanced, and it's situational, mostly for rapid, moving engagements. It's easy to go from a relaxed, but still on-target shooting stance to one that's fully balanced when you're already half way. Shooting braced like this is fine for moving engagements with carbines, but with larger caliber rifles it's going to result in a bruised shoulder and piss poor accuracy.
That was a huge thing I saw in Afghanistan among the Afghan police and military. We taught them to go from this:
Look at that s***
! One shot that the stock's going flying off his shoulder. Garbage, just garbage.
To this:
Much better. Of course stock alignment, situational drilling and shooting, and the individual rifle's ergonomics and caliber play their part in how you hold a rifle, but the stock's bottom on the top of your shoulder
? Not on my watch.
For standing shots the stock should rest just below your collar bone, cupped and snug against the meat of your inner shoulder and chest, or braced solely on your chest.
^That's how a professional does it. Two well balanced shooting techniques that work standing or moving.
^He get's it
. Nice technique Mr. Putin.
If you need to shoot with the stock resting on your upper shoulder because your neck's to short to see the iron sights properly, use an optic
.
2.Sensitivity to water - Piston based rifles,can be fired immediately after being submerged into the water,some even while being submerged in the water,however DI based ar is more sensitive to water,if you fire it without draining all the water ,then it will be prone to malfunction sometime catastrophic in nature.
Very important point. Where I'm from we're always on water - wet, frozen, snowy - it's ubiquitous. We'd jump from shore to sea without any covers, mods or thought to our weapon's malfunctioning when we made shore again. Salt corrosion, metal fatigue from cold waters, ice buildup, never a concern as we knew that when we needed it the HK416 would come through.