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AR-15 CMMG Gas Piston Kit For Carbines Make Your Carbine Run Cleaner and Cooler

CMMG, Inc.
Typically ships the same business day when ordered before 4pm CST.
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Piston conversion kit keeps your M4 carbine running cleaner and longer. Piston systems are cleaner on the operating system because the hot dirty gases are expelled near the gas block instead of inside the upper receiver. Piston kit replaces the front-sight base, handguard cap, handguards and bolt carrier on your stock upper. Piston is hard-chrome plated and is removable from the front of the gas block, and the bolt carrier includes an impingement key for maximum strength. Works on semi-auto carbines only, with 14.5" barrels or longer, and includes assembly instructions. Some gunsmithing required.

Total number of Reviews: 3

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2.0 5
"If you can read this dont buy this kit they are very sorry....dont fit well in mil-spec uppers save your money and get the Adams Arms piston kit"
3.0 5
"had quite a few problems jamming.Had to send it back to CMMG and they had to make the gas hole larger to make it work correctly. they did fix it."
1.0 5
"Out of all the reviews i'v read about it sound like its not so bad of a piston kit, however I just have to say after getting it and trying to install it on my dpms it would not work right half of the time, after a week of trying to make it work i just trash it and called up CMMG inc. they told me to sent it in so i did and got a new one in that works ok but if it where me next time id get an Adams Arms kit for a new ar-15 build"