ARMS 18 stovepiping and scope elevation issue

TACTICAL111

TACTICAL111

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It's a two fold question.

1) Get the occasional stovepipe with the ARMS. I had heard something on removing one or two coils from the extractor spring.
Can somebody clarify what my options are?
Is there a replacement spring?

2) I have run out of elevation adjustment on my scope with this mount (4-12X Redfield)
It is maxed out at 100 yrds for up elevation and I still need a few more inches of adjustment just to zero it. It's still 3 inches low.

The install went fine, no issues, so I'm a little stumped.
Have taken it all apart several times and re-installed, made sure the front tension bushing was not screwed down too hard thus raising the front of the mount.

Someone help :mad: :confused:
 
Ya PM M14Doctor on how many coils to cut or get a set of US spec springs. As for the scope running out of elevation there is a front pad at the front of the mount that you should use to increase or decrease your elevation.
 
running out of elevation is something i've never had happen with an arms.... windage yes.
that pad at the front is not supposed to be cranked tight enought affect elevation. It is a bearing pad or dampener not an elevation adjustment.
There has to be something else at play here. check your rings for debris between the ring and tube.
I once bought a set of scope rings at a gun show and had a similar issue.... stumped me. till i looked realy close at the rings and noticed one of them had a strip of black tape in it that the previous owner had installed. Blended in so well i never noticed.
 
Wouldn't you modify the tension of the ejector spring and not the extractor spring? I'd think that would have more influence on the rate of spin of the ejected casing.
 
The ARMS 18 has an elevation adjustment of sorts built in. The rear pad, that replaced the clip guide has a bolt that goes thru a machine screw. Loosen the front pad completely, loosen the side bolt, remove the rear bolt and right there you have an adjustment screw. Snug it down, then replace the bolt. Tighten the side bolt, the rear bolt and adjust the front pad, in that order! Should give you a few more minutes of elevation.

Scott
 
M14Doctor said:
running out of elevation is something i've never had happen with an arms.... windage yes.
check your rings for debris between the ring and tube.
Click to expand...

The rings are Millett btw, brand new. Appear to be OK.

We're talking about major elevation also. The 1st trip to the range at 100 yrds and I was 4 ft low! or somewhere around there :eek:
 
TACTICAL111 said:
The rings are Millett btw, brand new. Appear to be OK.

We're talking about major elevation also. The 1st trip to the range at 100 yrds and I was 4 ft low! or somewhere around there :eek:
Click to expand...

It doesn't take much to effect it to that extent. 4 feet is 48 inches. From my math that's approximately 48 thousandths of an inch over the span of a typical scope base. The front of the scope has to come down to bring the trajectory up.
 
Grizzlypeg said:
It doesn't take much to effect it to that extent. 4 feet is 48 inches. From my math that's approximately 48 thousandths of an inch over the span of a typical scope base. The front of the scope has to come down to bring the trajectory up.
Click to expand...

I have a gap of 0.038 from the front of the mount to the receiver.

I've raised the rear by 0.053 and will be at the range on Wed, we'll see if it works.

Appreciate all the input guys :cheers:

How did I raise the rear?

PS_0071_MACGYVER_RK.jpg
 
Those receiver mounted scopes and the M14 from what I gather from forum posts are just trouble. That's why I have a forward mounted scout scope on my M14. Never will have that problem and I can use my stripper clips to boot.
 
LOL
where did you shim?
the rear screw passes thru a threaded collar.... turn this down till it touches the stripper clip guide dovetail keeper, then install the keeper screw. follow kevin's advice on order of install steps as well. if there is still a problem, loosen her off and readjust that collar at the back till you reach a happy medium. Generally i'll dry fit the whole thing, install the parts and just snug the mount so i know it is seating fully, then i adjust that rear collar till it comes just snug, check there is no side bolt protrusion in the rifle's bolt lug raceway inside , then loosn the whole thing and remove. look for burs anywhere, and then proceed with full install. once the side and rear are tight, wind that pesky front pad down till it comes snug to receiver. final inspection, check for clearance at the front screw/handguard and if you have a long 3/4" straight dowel or steel/aluminum rod, about 2 feet long, lay it in the mounts rail groove and check for any major windage misalignment. instal yer optics and yer gravy ;)
 
M14Doctor said:
I once bought a set of scope rings at a gun show and had a similar issue.... stumped me. till i looked realy close at the rings and noticed one of them had a strip of black tape in it that the previous owner had installed. Blended in so well i never noticed.
Click to expand...

I'm officially an idiot f:P:

The rings came with some tape strips, I didn't even think about it.
Placed them on, not a care in the world.

At the range today my Mcgyver mod was utterly horrible and then I remembered what you said, so I thought screw it, and removed the strips from the rings.

VOILA!!
No problems, loads of elevation either way.

Sweet. Just wanted to say thanks :cheers:
 
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