campinginaz
Member
C172 Heavy said:
That is a lot of rounds! Thank you for the reply! I've also recently thought of doing an AR based SBR so I can swap uppers etc. Good to know the shorter piston uppers work well!
AR15's - direct impingement vs gas piston
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That is a lot of rounds! Thank you for the reply! I've also recently thought of doing an AR based SBR so I can swap uppers etc. Good to know the shorter piston uppers work well!
campinginaz
Member
YNOTAZ said:
Pretty good video for sure! I don't know if I agree with everything but there is a lot to consider here. I'm also going to look into the iron sights he had on there!
C172 Heavy
Member
Jack Dupp said:
I did not notice any accuracy issue with either the original 16" or 11.5" barrel out to 300 yards. Didn't spend any time shooting further as I used my MK12 clone for that. Now that you have me thinking about it I might see if Osprey has a 308 kit that I could use on my upcoming build. An 18" SPR style build. That would be a good test of accuracy.
QuangTri
Member
I know POF makes or made a completer piston AR10 rifle.Suck My Glock said:
Never seen a piston kit for the big block AR, might be in the market for one if Adams or other solid company makes one.
campinginaz
Member
xerts1191 said:
Haven't shot this one yet, but hopefully in the next few weeks.
mock0013
Member
If you are going to shoot a DI suppressed get a Radian Raptor SD charging handle
Notice the ports to dump into the bolt area and it has a lip on the end of the charging handle to direct gas up and away from directly back in your face.
Not all piston guns make great suppression hosts as I have Sig 556R piston gun that has a small break between the upper and lower where gas destroys the shooter in like 2 shots.. It's brutal.. your eyes hurt and water and you can't see for a few seconds if you rapid fire past 2 shots. Sig doesn't have (anymore) an adjustable gas system to reduce the pressure for suppressed sadly.
Piston systems are typically about 1/2lb heavier out in front of the gun.
I have a 2a Armament DI AR15 5.0lb factory built with every accessory they make and it shoots so soft and
My CMMG 10" AK47 is piston and shoots crazy soft.
the other nice thing about piston guns is the stock folds and when shooting suppressed you don't have to deal with Buffer weight replacements and springs.. the piston systems typically can shoot a broader range of ammo automatically which I value instead of having to jack with it.
B&T Piston and Scar16/17 piston setups are excellent. I understand the Sig MCX is also softshooting as is the MPX.
If you are installing an adjustable gas block on AR make sure to install with Rockset or Loctite Red and give it a good 24hrs to setup to minimize the gas blocks coming loose while shooting. You get what you pay for with Gas blocks on DI so don't cheap out if you plan to use a can and adjust it a lot or shoot lots of ammo.
Notice the ports to dump into the bolt area and it has a lip on the end of the charging handle to direct gas up and away from directly back in your face.
Not all piston guns make great suppression hosts as I have Sig 556R piston gun that has a small break between the upper and lower where gas destroys the shooter in like 2 shots.. It's brutal.. your eyes hurt and water and you can't see for a few seconds if you rapid fire past 2 shots. Sig doesn't have (anymore) an adjustable gas system to reduce the pressure for suppressed sadly.
Piston systems are typically about 1/2lb heavier out in front of the gun.
I have a 2a Armament DI AR15 5.0lb factory built with every accessory they make and it shoots so soft and
My CMMG 10" AK47 is piston and shoots crazy soft.
the other nice thing about piston guns is the stock folds and when shooting suppressed you don't have to deal with Buffer weight replacements and springs.. the piston systems typically can shoot a broader range of ammo automatically which I value instead of having to jack with it.
B&T Piston and Scar16/17 piston setups are excellent. I understand the Sig MCX is also softshooting as is the MPX.
If you are installing an adjustable gas block on AR make sure to install with Rockset or Loctite Red and give it a good 24hrs to setup to minimize the gas blocks coming loose while shooting. You get what you pay for with Gas blocks on DI so don't cheap out if you plan to use a can and adjust it a lot or shoot lots of ammo.
campinginaz said:
I have one gas piston AR (stock Sig 516 Patrol) and I like it plenty. That said - I don't know that there is a ton of value in going that direction unless you plan to shoot suppressed. My understanding has always been that gas piston is "better" in two situations:
1) When shooting suppressed - where the suppressor changes the pressure map for gasses at the gas port on a DI gun causing you to get a bunch more gas / carbon back through the gas tube and out the ejection port, and accelerating the rate at which the gun gets carbon clogged.
2) When shooting very large numbers of rounds between cleaning... like VERY large numbers of rounds... thousands... and the carbon buildup around the bolt and in the receiver can eventually start to impact function.
I think that #1 is reasonably well established as fact - and can be observed pretty easily by putting a suppressor on the gun and shooting into the wind to see how much difference there is (and it will no doubt vary by gun and suppressor so YMMV).
#2 is probably a non-factor for just about every civilian shooter - in that you probably are not going to be in a situation where you "need" to shoot thousands of rounds between cleanings and if the gun malfunctions it could cost you your life. If you never clean your guns - expect them to eventually have issues as a function of carbon buildup and grit in the works. Do DI guns get more carbon into the the BCG and receiver? Yep. Does the incidence of malfunction as a function of this carbon exceed the incidence of malfunction in a similar gas piston weapon used / neglected the same way? Who knows. Is the concern about a carbon clogged DI gun causing malfunctions very easily avoidable simply by cleaning the gun every once in a while? Yep.
For my part - if I were building a gun that I intended to shoot suppressed (and I am) - I'd build / buy a quality gas piston gun - primarily to avoid the extra gas in the face from the ejection port... Otherwise I'm not sure that the extra expense is warranted.
My 2 cents.
campinginaz
Member
Great advice on shooting suppressed. I don't have a 5.56 suppressor and probably won't get one. I definitely like the fact that they run cleaner, less to clean and more reliable. My PWS has been awesome, just haven't shot the Adams Arms yet. A few people on here have said the Adams Arms are pretty good, and honestly they aren't much more than a direct impingement.
campinginaz
Member
BigNate said:QuietM4 said:
I can only hear your post as spoken by Gunny Hartman...
Lol that makes two of us. Great movie!!
campinginaz
Member
xerts1191 said:
Both are great videos, especially the 2nd one! Nice to see that a piston driven AR was more reliable than an AK. I've always thought of the piston driven AR is the best of both worlds, lots of accuracy, and reliability.
campinginaz
Member
I keep forgetting to post in this thread. I took my Adams Arms out a few months ago an put a couple of mags through it. Functioned flawlessly.
campinginaz
Member
xerts1191 said:
I haven't taken it apart after shooting it (only put 60 rounds through it), but I'm familiar as I have a PWS as well. I want to test it out with steal cased ammo, I don't have any steal cased but I'll get some. I'd like to find the dirtiest steal cased ammo to see how it holds up.
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