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View Full Version : Crud in my lower after shooting 9mm AR?


chead
04-20-2012, 12:06 PM
Just shot about 200 rounds of Winchester White Box through a complete Spike's factory 9mm. It's my second range trip with the gun (shot 50 rounds previously).

I can't tell what it is, it looks like sand, but I cleaned it thoroughly before the range trip. It's hard to tell, but it looks like it's shiny when I wipe it down. Could it be bits of casings or primers? Maybe friction from the new bolt and hammer is wearing this off and blowing it back into the lower?

It doesn't seem to be getting into the chamber, which I'm mostly concerned about. I definitely don't want grit getting through the bore.

Here's a picture (click for big):

http://i.imgur.com/Aq2irl.jpg (http://imgur.com/Aq2ir)

Prc329
04-20-2012, 12:11 PM
Looks like dirty ammo to me but winchester white box normally isn't that bad. I remember taking a buddy to the range to shoot handgun. He rented a gun and used the range reloads. His T-shirt looked like that when we left.

Sicarius
04-20-2012, 1:02 PM
Just dirty ammo. Happens with blowbacks and the trigger pocket has a lot of space to catch all the crud.
Kevin

asgalindez
04-20-2012, 2:25 PM
Just dirty ammo. Happens with blowbacks and the trigger pocket has a lot of space to catch all the crud.
Kevin

This also happens when I shoot my dedicated AR22. Lower gets filthy just like in the OP. Gotta pull the FCG and clean out the lower every few bulk packs.

chead
04-20-2012, 6:33 PM
Gotcha, thanks guys!