Hard lessons learned

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jb2012
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Hard lessons learned

Postby jb2012 » Fri Dec 29, 2017 12:43 pm

Was putting an A2 flash hider on a barrel just now and either my barrel (ballistic advantage so I don’t think so) or the A2 was out of spec and when at the proper torque was upside down. I have a tendency to strong arm things to make them work and that was a bad decision. I now have a busted ballistic advantage barrel and aero upper receiver. :banghead: some lessons you learn the hard way.

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RogueUSMC
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Re: Hard lessons learned

Postby RogueUSMC » Fri Dec 29, 2017 2:47 pm

I have yet to find one that was indexed correctly at the recommended torque. I have always had to use shims. Most of the ones I have used are Claymores from Troy...indexing is just cosmetic with those...lol
A man will fight harder for his interests than for his rights.
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CleverNickname
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Re: Hard lessons learned

Postby CleverNickname » Fri Dec 29, 2017 4:33 pm

A muzzle device that requires timing needs a crush washer or shims. Everything might line up without them, but it's extremely probable that they won't. If they don't, then it doesn't mean that something's out of spec.

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Scott B.
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Re: Hard lessons learned

Postby Scott B. » Fri Dec 29, 2017 5:49 pm

Wait, both barrel and upper receiver are toast? I'm impressed. Pictures?

Bending the upper out of whack I can see. Did you shear off the extension pin?
LTC Instructor. NRA - Instructor, RSO, Life Member.
Sig armorer | FFL 07/02 SOT


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