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 Post subject: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 29 Apr 2010, 00:11 
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I am interested to hear board members opinion and experience with any of these systems. I am not interested in a debate between direct impingement and piston driven plataforms or why would you want to do that to your perfectly functioning AR. So if you have any knowledge of these systems please share it, Thanks.


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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 29 Apr 2010, 00:18 
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This topic belongs in long arms, sorry my bad, please feel free to move it.


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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 29 Apr 2010, 13:40 
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I have the Ares "kit" which is the same as the Bushmaster and have put several thousand rounds thru it with no problems so far. I have done a cpl "tweaks" to it but am overall pretty happy with it. Actually you have seen me use this rifle at the ACTS matches. Im pretty familliar with the Adams Arms kits and they seem to be very well made. If I were to build another piston gun I would probably go with one of the Adams Arms kit.

All I know about the Osprey kits is what Ive seen on the net about them.


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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 29 Apr 2010, 14:36 
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I've got the AA kit on 3 of my rifles, 2 in mid-length and 1 in carbine length. The only (albeit very minor) issue I've ever had with them was the carbine length, where the gas plug had to be fine-tuned, as it was causing the piston to short-stroke. But a couple swipes with an emery cloth and she was golden.

I've got them on: a 10.5" 6.8SPC Upper, an 18" 5.56 upper, and an 18" 6.5 Grendel upper. After my minor tweak, I haven't had a single reliability issue. Another thing that's nice about the AA kit, they fit in certain forearms that are made to fit around a standard front sight gas block assembly. Like me, I've got rifle-length rails with mid-length kits on my 18", and mid-length rails with carbine length kit on my 10.5" So it looks pretty clean. Also, with AA you can get either their 1 piece BCG, or the retro-fit carrier key for a standard BCG. I'll upload some pics for you this afternoon sometime.

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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 29 Apr 2010, 14:45 
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Thanks for your input! Do you think your system would fit under a Daniel Defense light rail?


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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 29 Apr 2010, 15:05 
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No, I'm pretty sure it wouldn't fit underneath. But it would definitely fit with some of their other rail offerings, ie:

the AR15 Lite Rail 12.0 FSP, which looks like this:
Image
Or the M4 Rail 12.0 FSPM, which looks like this:
Image

Basically, the block on the AA kit is fairly large, to accomodate the gas plug, which rotates for locking, regular operation, and operation with a suppressor. It also allows for mounting a BUIS front sight on the same level as the rest of the 12 o'clock rail.
Here's the block itself:
Image

If you look at the front of the block, you see the 4 slots, the one at 9 o'clock is for removing the gas plug and piston itself, the 12 o'clock position is for normal operation, the 1 o'clock position is for use with a suppressor, and the 3 o'clock position is for use as a single-cycle action (you have to charge it every time).

Here's the gas plug, which sleeves into the end of the piston:
Image

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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 29 Apr 2010, 16:16 
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Thank you azguns and WusteHase very informative. I'm afraid the AA system won't work for me because I have a .625 barrel, I may try the bushmaster but I will call them first to check their return policy.


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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 30 Apr 2010, 00:20 
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I am assuming your looking at just a kit to convert a barrel to gas piston.............Daniel Defense does have a specific line of rails that fit over most of the piston systems out there.


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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 30 Apr 2010, 01:02 
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I purchased the the AA kit and the daniel defense 9.5 fsp lite rail. You can find some pics of some other guys with this set up as well on the net.


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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 30 Apr 2010, 06:32 
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aztusk wrote:
I purchased the the AA kit and the daniel defense 9.5 fsp lite rail. You can find some pics of some other guys with this set up as well on the net.

I have the same set up, which works very well. Be sure to get the one piece bolt carrier, I had a bolt on key that broke in half. That jammed up and damaged the charging handle. AA did replaced the charging handle and sent a new key. I now use a one piece bolt carrier. CR


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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 30 Apr 2010, 10:48 
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+1 on the one piece bolt carrier. Its really the ONLY way to go on a piston setup.


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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 30 Apr 2010, 11:32 
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aztusk wrote:
I purchased the the AA kit and the daniel defense 9.5 fsp lite rail. You can find some pics of some other guys with this set up as well on the net.


You mean like the ones I posted earlier? [smilie=icon_rolleyes.gif] [smilie=icon_lol.gif]

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Life should be more like working with electricity. Being stupid should hurt. Being really stupid should kill you.
Glockmonger wrote:
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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 30 Apr 2010, 20:48 
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both my kits came with the one piece carrier. And they also have different finishes.


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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 30 Apr 2010, 21:26 
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+1 on Adams Arms. I have one carbine length on a 10.5 5.56 with a 7.0 Lite Rail & one mid length on 16" 5.56 upper with 9.0 Lite Rail. I don't have many rounds through either, but so far they run great both suppressed and unsuppressed. I have had an Ares and LWRC & prefer the AA.


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 Post subject: Re: Osprey Defense vs Bushmaster vs Adams Arms Gas piston
New postPosted: 30 Apr 2010, 21:40 
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Buck54 wrote:
+1 on Adams Arms. I have one carbine length on a 10.5 5.56 with a 7.0 Lite Rail & one mid length on 16" 5.56 upper with 9.0 Lite Rail. I don't have many rounds through either, but so far they run great both suppressed and unsuppressed. I have had an Ares and LWRC & prefer the AA.

Buck, Could expand on why you prefer one over the other? Thanks.


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