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Piston conversion vs complete piston upper

2027 Views 13 Replies 7 Participants Last post by  inceptor
I was pricing out the base model adams mid length kit and parts separate.

For about $639 I can cobble one together with a blem upper at PSA when all the parts show up in stock, or order a complete adams arms upper for $639 ;-)

This is the base model with the M4 handguards.
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Both have advantages. Converting or building you can use any parts you want or simply convert an existing upper. Buying a complete Adams you get their melonite barrels, custom Mega built receivers that don't need the bushing for the op rod, and warranty on the complete upper. They use Samson handguards on various models which are really nice and you get a pinned block.
What I have seen of the piston M4's, they are not true piston because they still have the buffer spring.
Pretty much every piston action uses a return spring. Piston AR designers are working the AR platform. And for a long time and it's not changing ever more than likely, AR users prefer as many common parts as possible. Other manufacturers have made piston AR uppers with a upper return spring and they've pretty much been a flop. There absolutely nothing wrong with using the buffer spring as the return and keeping parts as standard as can be in number. I prefer it myself. I use Superior Shooting's chrome silicon buffer spring in mine at present and likely for a very long time since they are rated to about 500,000 compressions. More rounds than I'll ever shoot in my lifetime I've no doubt. I also use a heavy stainless buffer too that reduces recoil, but used a regular carbine buffer and spring for a long time and with all my previous piston AR's.

Rock River would appreciate the business if you're interested though. :) If I wanted a rifle with an upper return spring though, I'd probably just buy a SIG 556, SCAR or ACR.

Rock River Arms: LAR-PDS Carbine
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Lets leave the piston AR bashing bringing up the same tired stuff that has been hashed over by people who don't own one and are happy with DI a million times. It's beyond old and the OP's question wasn't about it.
I'm not sure if you are referring to my post! But all the AR's that I own are piston driven AR's. And I do prefer piston over Di. Then again not all piston driven AR's are equal. I have owned several brands of piston driven AR's and some are prone to carrier tilt. I can understand people who have purchased one of these piston AR's would not want to talk or hear about the problem. Just trying to prevent the OP from making the same mistake. Sorry.
Yeah I was, because it's not really a problem anymore with most manufacturer having worked around it a long time ago and it being a very particular subject of negativity with piston haters for years. My not wanting to talk about was that it has been dragged into every piston discussion for years regardless and then someone makes it so whole threads basically turn into a DI/piston argument. I'm seriously tired of it myself, but that you are a piston AR owner makes this a different situation. I haven't had tilt trouble with Adams, but if anyone did, Adams would take care of them from what I've gotten from other owners who needed customer service.
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