The barrel is so thin how exactly is the rifling made? Years of doubt solved 科学探照灯er 2 years ago Play Download
What is the purpose of rifling in a gun barrel, and how do bullets keep flying straight? (3) #Kno... 科学探照灯er 3 weeks ago Play Download
There is a mystery in the gun barrel of millimeter level. The reaming production is so simple. I wi 科学探照灯er 1 year ago Play Download
Does the rifling inside a gun barrel make the bullet more accurate or faster? #VarietyShow #Comme... 巨石短剧 1 month ago Play Download
Chiappa Rhino Snub-Nose Revolver! Its Firing Mechanism Will Shock You #WeaponScience #WeaponKnowl... 烧饼聊影视 1 hour ago Play Download
1915 DWM P08 德军一战二战主力手枪 #airsoft #8bit #military #ww2 #army #automobile #mm2 #電影 #電影 老郭寻枪 1 year ago Play Download
