Reviews & Ratings for Adams Arms P Series Micro Block Rifle Length Piston Kit — 1 review — Page 1

Will not work with PSA uppers due to limited space around the barrel nut. Also, it shows the upper reciever bushing in the picture but it was not included in mine(some people have noted if you dont use a bushing it will slowly bore out the gas tube hole). While I can not attest to the durability of the product, the bolt carrier seemed nice. Where the gas block and piston join however feels rather... Well, rough. The piston shaft is light weight, which to many is a plus, just hope it holds up.id try it out if you can find a bushing and have a compatible barrel nut (low profile) or want to replace yours (kinda a pain, especially if you dont realise until your gun is torn apart)