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Posted: 1/23/2017 5:51:22 PM EDT
[#1]
I recently had to change to a Spikes ST-T2 to make my Echo trigger run in my SBR. Up until then, one had only a standard carbine buffer and the other had an H buffer. I haven't had to change a buffer or spring to make any of my ARs in various barrel lengths run with the Gem-tech Halo and various 5.56 loadings.
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Posted: 1/23/2017 5:58:21 PM EDT
[#2]
I guess I should have phrased my question a little differently. What I meant to ask was for the guys that are trying to tame the over gassed barrel of the MK18 with buffers and springs instead of adjustable gas blocks. Not that they had to be changed to get it to run.
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Posted: 1/23/2017 9:19:20 PM EDT
[#3]
I have an early DD 11.5" LW barrel and AAC M4-2000. I put a H2 buffer and Wolff XP recoil spring (16501) in it. When I had a standard spring, the bolt would sometimes outrun the mag and I'd get a failure to feed, when firing suppressed. Now it works fine suppressed or not, even when the mag gets dirty.
If you increase the buffer weight, you'll slow the cyclic rate, but the recoil increases a little. That's why I stiffened the spring instead of going with an H3 buffer. Either would've worked, or I could've done both. DD's are seriously over-gassed. I actually like the high cyclic rate though. I can touch off a fast 3-round burst and put them all center mass quite easily with the can on there. |
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Posted: 1/23/2017 9:26:12 PM EDT
[#4]
I use a standard carbine spring and an H3 buffer in my 11.5" bbl.
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Posted: 1/24/2017 4:01:13 PM EDT
[#5]
Your other alternative is to use a Suppressed Bolt carrier from the likes of Gemtech or Bootleg...
Mick |
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Posted: 1/24/2017 9:04:12 PM EDT
[#6]
Or something like the Innovative Arms W.A.R. upper.
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Posted: 1/25/2017 8:35:58 PM EDT
[#7]
10.5, carbine spring, H2 buffer, factory FSB. Not harsh whatsoever suppressed or un-suppressed. A little gassy but that goes with the territory. Every rifle is different, but if it runs it runs.
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Posted: 1/26/2017 8:20:56 AM EDT
[#8]
I'm running a PWS H2 with a JP +10% spring on a factory DD Mk18. Unsupressed its flawless, nice 3-4oclock ejection, suppressed with an AAC SDN-6 its still over gassed, throws them at 1 o'clock, but reliable through about 1000 rounds now which is all I care about. As far as recoil, its a 5.56 and I'm not 3 gunning trying to save 5/100ths of a second, its a fighting rifle and the recoil is fine. Rather over gassed slightly than under.
You could always look at a gemtech suppressed carrier, seems really nice and requires no modification to the weapon. |
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Posted: 1/26/2017 9:44:47 AM EDT
[#9]
Quote HistoryQuoted:
I guess I should have phrased my question a little differently. What I meant to ask was for the guys that are trying to tame the over gassed barrel of the MK18 with buffers and springs instead of adjustable gas blocks. Not that they had to be changed to get it to run. My MK18 is unsuppressed. That said, I use a Spikes ST-T2 buffer and a Blue SpringCo spring. The gun runs smooth as a top....but again, unsuppressed so not sure it helps. |
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Posted: 1/26/2017 9:47:44 AM EDT
[#10]
Quote HistoryQuoted:
Or something like the Innovative Arms W.A.R. upper. Never heard of them but looks like a great idea. |
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Posted: 1/26/2017 12:14:44 PM EDT
[#11]
Quote HistoryQuoted:
Never heard of them but looks like a great idea. Quote HistoryQuoted:
Quoted:
Or something like the Innovative Arms W.A.R. upper. Never heard of them but looks like a great idea. |
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Posted: 1/26/2017 4:15:25 PM EDT
[#12]
Thanks for the responses guys, helps out a lot. I was only curious about spring and buffer combos. Like I said I'm running an adjustable gas block now and no issues. Was just thinking about running another sbr without an adjustable gas block and going the spring and buffer route because.....well, just because
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Posted: 1/26/2017 5:23:30 PM EDT
[#13]
LMT 10.5", standard spring, H2 buffer, fixed FSB. Not gassy at all...
Your choice in suppressor will have a lot to do with backpressure. |
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Posted: 1/29/2017 10:56:01 AM EDT
[#14]
I run my MK18 with a standard spring, H3 buffer, and BCM charging handle. Runs smooth with and without the suppressor with just a slight hint of over gas when suppressed.
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Posted: 1/29/2017 7:20:44 PM EDT
[#15]
Quote HistoryQuoted:
I run my MK18 with a standard spring, H3 buffer, and BCM charging handle. Runs smooth with and without the suppressor with just a slight hint of over gas when suppressed. What suppressor are you running and whats your ejection pattern like with it? |
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Posted: 2/6/2017 8:28:34 PM EDT
[#16]
Quote HistoryQuoted:
What suppressor are you running and whats your ejection pattern like with it? Quote HistoryQuoted:
Quoted:
I run my MK18 with a standard spring, H3 buffer, and BCM charging handle. Runs smooth with and without the suppressor with just a slight hint of over gas when suppressed. What suppressor are you running and whats your ejection pattern like with it? I run a YHM Phantom Ti 5.56. As far as ejection pattern goes it is anywhere from 5 to 2 o'clock. In saying that though I feel as long as the rifle runs reliably suppressed and unsuppressed, with the types of ammo I shoot, I really don't care to much about ejection pattern. As long as it is not ripping brass apart. I've seen people take a 100% reliable shooting rifle and start chasing the ejection pattern profiles and all the sudden their rifle starts having problems. They end up with a rifle that has their preferred ejection pattern suppressed but then the rifle short strokes unsuppressed and vice versa. |
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