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8/12/2026 3:41:04 PM EDT
This is the 3rd time that I’ve cleaned my 180, I admit I don’t shoot it all that much. This part fell out on the floor and I didn’t see where it came from. I have a Gen 2 16 inch upper if that matters. Does anyone know where this goes? I’ve reassembled it without this part in place wherever it goes and hand cycling works okay.

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If a 147 grn 9mm at 1000 FPS is the hammer of Thor then a 165 grn. 40 at 1200 fps must a lightening bolt from Zeus!
8/12/2026 5:29:16 PM EDT
[#1]
Looks almost like it could be a bushing for the gas system.
WTB: Steel Bodied Surefire Trainer
8/12/2026 7:59:42 PM EDT
[#2]
Quote History
Originally Posted By Postal0311:
Looks almost like it could be a bushing for the gas system.
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I thought so too but I don't know where it goes, the piston rod fits through it...
If a 147 grn 9mm at 1000 FPS is the hammer of Thor then a 165 grn. 40 at 1200 fps must a lightening bolt from Zeus!
8/12/2026 8:11:40 PM EDT
[Last Edit: Nobody69s][Edited] [#3]
It might slide into the  receiver side (rear) of the gas block.
It looks kind of like my mr556 bushing/piston gas bushing kind of but mine has gas rings on the end of a nipple looking thing.

Possibly the piece with the arrow?
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8/12/2026 8:53:09 PM EDT
[Last Edit: stiglitz_actual][Edited] [#4]
That goes into the receiver, at the top-front where the piston rod runs through

Brownells never updated their diagrams or manuals with some of the design revisions
8/12/2026 8:59:16 PM EDT
[#5]
I wondered about that, thanks! I'll put her back together when I get home....
If a 147 grn 9mm at 1000 FPS is the hammer of Thor then a 165 grn. 40 at 1200 fps must a lightening bolt from Zeus!
8/14/2026 1:33:07 PM EDT
[#6]
Glad you were about to find help with this!
Redd Bingham
Guntech III
Brownells Inc.

https://lnk.bio/Redd_BrownellsGT

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