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Adams Arms MPSDADA AR-15 Gas Piston Kit 16"-18" Mid-Length .75" Diameter
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Most Helpful Positive Review Adams Arms piston kit
The piston conversion kit is the only way to go. The internals of your weapon will appreciate the gas free/carbonless environment this kit provides along with your cleaning of the weapon will speed up considerably. I find that MOE hand guard covers offer a very easy fix to just the standard hand guards provided with the kit. It does take about 20-30 minutes to do the conversion, but it is absolutely worth the time involved. The heat alone that the regular gas impingement creates is enormous compared to this kit which saves the life of your weapon. I highly recommend this conversion kit and it ...
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Awesome upgrade

by Bob, from NH, United States Written on February 4, 2018
I have a few of AA these piston kits on various length rifles and they all work flawlessly. I would recommend this upgrade to anyone building a new rifle or looking to give their current rifle a boost.
Would recommend: Yes
2 of 2 found the following review helpful.
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Great piston kit

by Operator77, from TX, United States Written on May 3, 2017
This piston kit is awesome very smooth didn't add a bunch of weight either the hand guards could be better but it's a good product at a good price I went free float with it easy to install functioned 100% I would highly recommend this kit
Would recommend: Yes
3 of 3 found the following review helpful.
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Last updated 2025-11-12 UTC.