Benefits, if any of Piston vs DI for SBR?

Discussion about rifles in 300 AAC BLACKOUT (7.62x35mm), hosted by the creator of the cartridge.

Moderators: gds, bakerjw, renegade

Suputin221
Silent But Deadly
Posts: 349
Joined: Thu Dec 22, 2011 9:03 pm

Re: Benefits, if any of Piston vs DI for SBR?

Post by Suputin221 »

300Blk wrote:Not when suppressed - the goop comes through the bore - just as it does on an MP5.
Absolutely correct AND the piston rifle will be annoyingly loud when suppressed.

I have two short barreled 300 ARs running DI and I haven't experienced any cycling problems with them over a variety of different ammo types.

I see absolutely no reason to choose a piston system.
User avatar
JasonM
Silent But Deadly
Posts: 344
Joined: Sat Jul 16, 2011 3:51 pm
Location: NoVA
Contact:

Re: Benefits, if any of Piston vs DI for SBR?

Post by JasonM »

pingi333 wrote:Just curious..... Who were the other 5%?

Thanks
Mostly LWRC and a few HK416's
Graphic design and branding: https://www.facebook.com/VisualGravy

Some clients include AAC, Rem Defense, Daniel Defense, MilTimes, TrackingPoint, Ambush, Noveske, Unity, Rem, Bushmaster, NRA, etc.
pingi333
Silent Operator
Posts: 54
Joined: Sun Oct 22, 2006 7:57 pm

Re: Benefits, if any of Piston vs DI for SBR?

Post by pingi333 »

Thanks..... Man those 416's are pigs arent they?
imyomama
Silent But Deadly
Posts: 428
Joined: Tue Mar 17, 2009 3:51 pm
Location: texas

Re: Benefits, if any of Piston vs DI for SBR?

Post by imyomama »

this is funny .. you ask a question , and the people that respond not in favor of pistons are the people that manufacture DI systems only. what does that tell you ?

so here's my opinion from a un-biased point of view ... I had both ... I have a PWS 12.5 " upper (piston ) and I had a 12.5 daniel defense 12.5 DI. the PWS ran MUCH cleaner ! both were ran 100% of the time with an m4-1000. the DI was more picky on ammo .
SOLD IT!

no I don't have the 300blk from pws yet so this is 556 comparison ... but I don't see why it would be any different .
The concept itself of having gas pushing a BCG versus a rod should be enough for anyone to conclude that it has to be dirtier! my bolts ran suppressed always look gunked up after a shooting session... the pws does not even have the gas rings on the bolt ... i've never even taken it apart to clean it yet ... but I have many times on the di's...

Image
Image
-------------------------------------------------------
"Are you gonna pull those pistols or whistle Dixie?" --- Clint Eastwood --- The Outlaw Josey Wales
User avatar
JasonM
Silent But Deadly
Posts: 344
Joined: Sat Jul 16, 2011 3:51 pm
Location: NoVA
Contact:

Re: Benefits, if any of Piston vs DI for SBR?

Post by JasonM »

pingi333 wrote:Thanks..... Man those 416's are pigs arent they?
Not with a new rail... the new Giessele and DD rails totally transform the feel of the gun, I was impressed.

Image
Graphic design and branding: https://www.facebook.com/VisualGravy

Some clients include AAC, Rem Defense, Daniel Defense, MilTimes, TrackingPoint, Ambush, Noveske, Unity, Rem, Bushmaster, NRA, etc.
User avatar
JasonM
Silent But Deadly
Posts: 344
Joined: Sat Jul 16, 2011 3:51 pm
Location: NoVA
Contact:

Re: Benefits, if any of Piston vs DI for SBR?

Post by JasonM »

I think it's telling that LWRC went with a DI system on their 300 BLK SBR.
Graphic design and branding: https://www.facebook.com/VisualGravy

Some clients include AAC, Rem Defense, Daniel Defense, MilTimes, TrackingPoint, Ambush, Noveske, Unity, Rem, Bushmaster, NRA, etc.
trenttyre
Silent But Deadly
Posts: 202
Joined: Fri Mar 04, 2011 12:26 pm

Re: Benefits, if any of Piston vs DI for SBR?

Post by trenttyre »

Has anyone had a chance to look at the new Robinson Arms XCR micro that is chambered in 300blk or whisper or what ever they are calling it?

RA's system seems to be a great solution to the piston design. ie no receiver extension or buffer and is a far beefier piston like an AK.

I think it does say something that LWRC went DI; however, that might have been done so they could hit the market early before other adopters released their guns and buy some time so they can do more R&D on a piston system.
User avatar
JasonM
Silent But Deadly
Posts: 344
Joined: Sat Jul 16, 2011 3:51 pm
Location: NoVA
Contact:

Re: Benefits, if any of Piston vs DI for SBR?

Post by JasonM »

trenttyre wrote:Has anyone had a chance to look at the new Robinson Arms XCR micro that is chambered in 300blk or whisper or what ever they are calling it?

RA's system seems to be a great solution to the piston design. ie no receiver extension or buffer and is a far beefier piston like an AK.

I think it does say something that LWRC went DI; however, that might have been done so they could hit the market early before other adopters released their guns and buy some time so they can do more R&D on a piston system.
The XCR is intriguing for sure. I've only used one in 5.56. A gun designed around a piston system- like an AK, ACR, SCAR, etc... Would make a very cool 300BLK PDW
Graphic design and branding: https://www.facebook.com/VisualGravy

Some clients include AAC, Rem Defense, Daniel Defense, MilTimes, TrackingPoint, Ambush, Noveske, Unity, Rem, Bushmaster, NRA, etc.
User avatar
RAINS
Silent But Deadly
Posts: 542
Joined: Mon Sep 30, 2013 6:18 pm

Re: Benefits, if any of Piston vs DI for SBR?

Post by RAINS »

Go with DI for a 300blk gun. It's not like your going to be shooting hundreds of rounds of cruddy/gummy Wolf ammo per range session. (I wish Wolf made cheap cruddy/gummy ammo for 300blk..hehe) For now it seems like it's hard to make a piston 300blk gun run well. Especially with a short barrel. Look at the problems PWS has had. They are are at or near the top when it comes to piston guns.
300blk was MADE for short barrels it works better than any other rifle round in short barrels. It burns much cleaner with less left over powder than a 5.56/7.62x39. It was designed that way. It was also designed to run with a DI gas system.
Do note that I am an AK person. Also know that it takes me much less time to clean my DI 300blk than my AK or my long gone 5.56 sig 556 sbr. With an AR you just clean the BCC group, upper/lower and barrel. With a piston gun you must also clean the piston, gas tube and gas port. It's also much harder if not impossible to stock extra parts for a piston gun. DI stuff is cheap and everywhere.
For truck gun low maintenance or zombie end of the world fantasies I'd still pick an AK. But for the REAL world a 300blk Di sbr/pistol is where it's at. Have fun and good luck with your choice.

R
User avatar
danner
Silent But Deadly
Posts: 677
Joined: Sat Feb 14, 2015 1:22 am
Location: MI

Re: Benefits, if any of Piston vs DI for SBR?

Post by danner »

holy old thread batman.
Someone who is ruled by the "discretion" of another is, to that extent, a slave.
Post Reply

Who is online

Users browsing this forum: No registered users and 150 guests