AR-15 Problems.

Dantrom

Dantrom

Sergeant
Full Member
Minuteman
Supporter
Jun 30, 2009
964
35
northwest ohio
#1
I have been buying parts for my first AR build now for about a year and basiclly ended up with a complete Rock Rive Arms predator rifle with their 24" wilson bull barrel. Got it all together last weekend and took it out to the range. I am having problems with the rifle loading the next round after i fire. it will even eject the spent shell just wont pick up the next from the mag. I checked the gas block and it was off alighnment SLIGHTLY, not much at all. so I realigned best I can and havnt been able to get the range again to see if it helped. but like i mentioned, it was off so slightly, I was wondering if there ar any other things I should be looking into? or any other suggestions? I was wondering if it is possible for the spring in the stock to be too strong? It has the long ACE skeleton stock.

In NO WAY AT ALL AM I DISCREDITING OR COMPLAINING ABOUT RRA RIFLES AT ALL. This is my first AR and the problem is probably my lack of experience with these rifles for trouble shooting.

Also, is it normal for there to be gas debris around the gas block after use? because there was.
 
#3
Re: AR-15 Problems.

If the gas system was suspect, the rifle would fail to come out of battery and would not allow the bolt to move rearward, failing to eject/extract the fired case. If you are having issues chambering a fresh round from the mag, it is most likely a mag issue or ammo OAL. With the bolt latched in the open position, dropping the bolt on a loaded round and see if it feeds freely.

Kirk R
 
#4
Re: AR-15 Problems.

Kirk,
yes it does load freely.
one thing to note. not sure if it mean anything but the spend shells also show rifling on the neck of the brass. does this mean anything?
 
#6
Re: AR-15 Problems.

Take and load 1 round in the mag, chamber, and fire, see if it locks back on an empty mag.

And what kind of ammo are you using? Hopefully something of a quality full power round. If using wolf your problem is shitty ammo.
 
#8
Re: AR-15 Problems.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dantrom</div><div class="ubbcode-body">

Also, is it normal for there to be gas debris around the gas block after use? because there was. </div></div>

Not really. If you load one round in a mag will it lock the bolt back after you fire the one round.

Onthis one I'm gonna have to respectfully disagree with KRock459. A bad loss of gas pressure will keep the rifle from extracting and ejecting a round, but it is quite common to have "just not enough" to fully cycle the action. The bolt does not have to go back as far to eject an empty case than it does to strip a fresh one (hence the term "short stroking").

What kind of buttstock are you running? If its based on a carbine buffer tube, you don't have an "H" of "H2" marked buffer do you? If so get a regular weight buffer.
 
#9
Re: AR-15 Problems.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Outsydlooknin75</div><div class="ubbcode-body"> If using wolf your problem is shitty ammo. </div></div>

Cop out-a well built AR should be able to run Wolf fine. There are plenty of "mil spec" rounds that are more underpressured than Wolf.....Radway Green comes to mind.
 
#12
Re: AR-15 Problems.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Outsydlooknin75</div><div class="ubbcode-body">Take and load 1 round in the mag, chamber, and fire, see if it locks back on an empty mag.

And what kind of ammo are you using? Hopefully something of a quality full power round. If using wolf your problem is shitty ammo. </div></div>

I'm using production winchester 55 grain

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sobrbiker883</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dantrom</div><div class="ubbcode-body">

Also, is it normal for there to be gas debris around the gas block after use? because there was. </div></div>

Not really. If you load one round in a mag will it lock the bolt back after you fire the one round.

Onthis one I'm gonna have to respectfully disagree with KRock459. A bad loss of gas pressure will keep the rifle from extracting and ejecting a round, but it is quite common to have "just not enough" to fully cycle the action. The bolt does not have to go back as far to eject an empty case than it does to strip a fresh one (hence the term "short stroking").

What kind of buttstock are you running? If its based on a carbine buffer tube, you don't have an "H" of "H2" marked buffer do you? If so get a regular weight buffer.
</div></div>

I'm using the rifle length Ace Stock. I dont think it's based on the carbine. it's called the rifle length, and they make the same stock shorter that i think is based on a carbine build.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Scottmilk9</div><div class="ubbcode-body">its a gas issue!</div></div>

Where should i be looking? the gas bock, tube, gas key from the bolt, buffer spring?
 
#13
Re: AR-15 Problems.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dantrom</div><div class="ubbcode-body">Kirk,
yes it does load freely.
one thing to note. not sure if it mean anything but the spend shells also show rifling on the neck of the brass. does this mean anything? </div></div>

Rifling?!?!? Yes, that's a serious issue- it means your throat is significantly further back than it should be, or in easier terms, your chamber is too short. Unless this is reloads and you're not trimming for length.
 
#15
Re: AR-15 Problems.

I'm a cheap bastage. Wolf and Brown Bear is all I ever shoot anymore in my ar's. Only way I can afford to take them out to play. RRA lower on a Larue Stealth 16" upper. As they advertise, 1 ragged hole, even with wolf ammo.
Also have a full RRA and a RRA in 9mm.

Short of putting it back together after a good cleaning, I have never attempted to "build" my own. So, if the build is the problem, I'm afraid I can't help you.
 
#16
Re: AR-15 Problems.

My rifle will NOT run wolf reliably unless I am shooting suppressed. I wont run Wolf thru my suppressor, so hence I dont shoot wolf in my rifle. I dont like it, it leaves wolf turds all over the place, and its underpowered.

I know why my rifle doesnt shoot Wolf, I could change things around to get wolf to run but I dont. I think its just easier to shoot a better quality ammo than the cheap russian shit.

I run a heavy buffer, and an extra power spring = no wolf shit.
 
#18
Re: AR-15 Problems.

Your weapon is short stroking . What is the dia. of your gas port? The most over looked item in the gas system is the gas port and with a wilson 24" BB the post was probally left on the small side of the spec. The twist rate of that barrel is most likely 1/8 and it is set up to run heavy bullets (77 smk) Run some 77 gr loads and I bet it will cycle fine.Ask me how i know.L.O.L. NOW if you want it to run lite stuff open the port 5 or 10 th. and rock on.
Scot
 
#19
Re: AR-15 Problems.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dantrom</div><div class="ubbcode-body">
Also, is it normal for there to be gas debris around the gas block after use? because there was. </div></div>

1) Cannot have gas debris around the gas block without a gas leak.....

2) I haven't had an Ace tube, pop your buffer out, if it is long its a rifle buffer if its short, look for an H or H2 on the face of it.
Heavy buffers are an answer to the timing issues created when folks decided to get away from Mr Stoner's original design.

3) see #1

4)if that fails, see scottmilk9's post-he does AR's to feed his babies and they're growing just fine.
 
#20
Re: AR-15 Problems.

I had a problem similar to yours. Wolf would unlock the bolt. My reloads would push the bolt back far enough to eject the empty case, but not pick up a new round. Factory ammo would push the bolt back far enough to eject the empty case and chamber a new round, but not lock the bolt to the rear. The gas port on my barrel was drilled slightly off and was partially blocked by the front sight base.
 
#21
Re: AR-15 Problems.

I'm not shooting wolf ammo.
no wolf.
i got looking and it isnt rifling marks on the cases but rather TWO feed ramp marks a friend told it was normal for an new ar and would eventually go away upon use.
I realigned the gas tube. didnt help. I have some black hills 68 grain and 75 grain and will try those. if there is still a problem i am going to cut a .25" at a time off the buffer spring until i have success.
wish me luck.
Dan
 
#22
Re: AR-15 Problems.

I ended up taking half an inch off the buffer spring. seems to have done the trick, works great now. thanks for all of your help and advice I really appreciate it.
dan
 
You must log in or register to reply here.

Similar threads

W
What's the AR version of an Origin/Bravo/PVA prefit?
Replies
4
Views
192
supercorndogs
supercorndogs
Jokerkg
First AR-15 SPR Build: Barrel Suggestions?
Replies
15
Views
699
oldrifleman
oldrifleman
O
18" 6.5 Creedmoor gas gun- rifle or +2 rifle gas
Replies
4
Views
584
jhoyda
J
P
AR-10 Precision Rifle Shopping - Need Some Input & Advice
Replies
20
Views
660
freedom71
freedom71
Valkyrie1776
Very Dirty AR
Replies
14
Views
513
Ex E6
Ex E6
Top Bottom
Back
Home
Forums
Merch
Alerts