Madcap_Magician
Member
I have always been curious- what, if any, is the mechanical reason that 9mm AR-15s are all blowback operated instead of maintaining the gas system?
The M16A4 was the first centerfire rifle I ever shot. Last summer for Law Enforcement Skills, I did AR-15 training with Colt 9mm carbines. I noticed that the 9mm carbine actually had noticeable recoil. Not much, but more than a 5.56mm carbine. I attributed this to the blowback operation versus the direct gas impingement system given my experience with blowback-operated handguns.
Nobody has ever been able to tell me why it's not practical and/or desirable to do a gas-operated pistol-caliber AR.
Anyone know?
The M16A4 was the first centerfire rifle I ever shot. Last summer for Law Enforcement Skills, I did AR-15 training with Colt 9mm carbines. I noticed that the 9mm carbine actually had noticeable recoil. Not much, but more than a 5.56mm carbine. I attributed this to the blowback operation versus the direct gas impingement system given my experience with blowback-operated handguns.
Nobody has ever been able to tell me why it's not practical and/or desirable to do a gas-operated pistol-caliber AR.
Anyone know?