AR15.Com Archives
 DPMS Sportical LR-308 Sights and Sling
amos1909  [Member]
8/10/2009 8:20:30 AM EST
I am confused and need some help,

I am new to the Ar-10 platform. I just bought a DPMS Sportical LR-308 and had purchased a Troy Front and rear sight. I did mount the sights but they do not look right to me. It looks like the front sight is lower than the rear. Can anyone tell me what I am doing wrong or is it just my eyes?

How do I install a sling on a LR-308? I assumed that it would be like my M&P 15OR and would have a mounting spot on the underside of the gas block.

Thanks,
Amos1909


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FLATFOOT762  [Member]
8/10/2009 8:59:55 AM EST
Did you buy a front sight that is meant to be used on a railed forearm? If you did, and put it on the gas block, that would explain why it looks lower.
LARRYG  [Team Member]
8/10/2009 11:55:13 AM EST
Originally Posted By amos1909:
I am confused and need some help,

I am new to the Ar-10 platform. I just bought a DPMS Sportical LR-308 and had purchased a Troy Front and rear sight. I did mount the sights but they do not look right to me. It looks like the front sight is lower than the rear. Can anyone tell me what I am doing wrong or is it just my eyes?

How do I install a sling on a LR-308? I assumed that it would be like my M&P 15OR and would have a mounting spot on the underside of the gas block.

Thanks,
Amos1909




Well, this is the AR10 forum, which the LR-308 is not.

However, I will try to address your question. On the 7.62x51/.308 ARs, the rail on the receiver is actually higher than on a 5.56/.223 AR due to the bigger round. You have to get a particular BUIS for the front. It's a little taller than the one for a 5.56 rifle.

I don't know about sling mounts for the DPMS as the AR10s do come with a normal sling swivel as part of the gas block.

You might want to contact DPMS about that or post that question in the "AR Variants" forum.
amos1909  [Member]
8/11/2009 5:49:42 AM EST

Originally Posted By LARRYG:
Originally Posted By amos1909:
I am confused and need some help,

I am new to the Ar-10 platform. I just bought a DPMS Sportical LR-308 and had purchased a Troy Front and rear sight. I did mount the sights but they do not look right to me. It looks like the front sight is lower than the rear. Can anyone tell me what I am doing wrong or is it just my eyes?

How do I install a sling on a LR-308? I assumed that it would be like my M&P 15OR and would have a mounting spot on the underside of the gas block.

Thanks,
Amos1909




Well, this is the AR10 forum, which the LR-308 is not.

However, I will try to address your question. On the 7.62x51/.308 ARs, the rail on the receiver is actually higher than on a 5.56/.223 AR due to the bigger round. You have to get a particular BUIS for the front. It's a little taller than the one for a 5.56 rifle.

I don't know about sling mounts for the DPMS as the AR10s do come with a normal sling swivel as part of the gas block.

You might want to contact DPMS about that or post that question in the "AR Variants" forum.

Thanks for the input,

I called DPMS and they informed me that the front rail and gas block are higher but that a standard Ar-15 gas block flip sight will work. The Troys are for front fore rails.

LARRYG, this is the "AR Variants" Forum, I was certain that I had selected "AR Variants" but maybe I had made a mistake! But it does say "AR Variants Forum at the top of the page... If I did put it in the wrong Forum I apologize...
Thanks,

Amos1909

Cheesebeast  [Member]
8/11/2009 5:56:45 AM EST
The rail on the receiver of the Sportical is higher than it is on an "M4" style flattop.

There may be riser blocks for the front sight available that will bring the front sight into "line" with the rear sight, or you could see if a dedicated front sight is made that will fit your needs.

If you do mount a scope the receiver you have on the Sportical makes things a bit easier. I was able to use a standard set of high rings and get a cheek weld sight picture using a standard scope.

Anyway, don't be discouraged by your sight woes. The rifle will probably shoot very well at the range. The accuracy of mine surprised me.
amos1909  [Member]
8/11/2009 6:12:47 AM EST

Originally Posted By Cheesebeast:
The rail on the receiver of the Sportical is higher than it is on an "M4" style flattop.

There may be riser blocks for the front sight available that will bring the front sight into "line" with the rear sight, or you could see if a dedicated front sight is made that will fit your needs.

If you do mount a scope the receiver you have on the Sportical makes things a bit easier. I was able to use a standard set of high rings and get a cheek weld sight picture using a standard scope.

Anyway, don't be discouraged by your sight woes. The rifle will probably shoot very well at the range. The accuracy of mine surprised me.

I am looking forward to getting it out to the range and shooting it.DPMS told me that the rear rail had been raised but that the front rail had been bumped up for the standard gas block sight. Did they tell me wrong? I just ordered a sight (YHM) for it...
Cheesebeast  [Member]
8/11/2009 6:25:56 AM EST
I suppose the top of the gas block is in line with the rear receiver on the Sportical, so the gas block has to be higher.

I don't know why the Troy stuff did not work for you then?

As an aside if the weight of the Sportical gets to you send it off to Adco. They shaved off (guess) about a pound off of mine and I saw no difference in accuracy. That and upgrading the trigger are the two most significant upgrades I made.

Then again, I also tossed the Pardus stock (Magpul CTR replacement) and installed a Tangodown grip....

Enjoy your new rig.
amos1909  [Member]
8/11/2009 6:31:08 AM EST
Troys are made for the Front Fore Rail, so that makes them to short. Troy does not make them for the Gas Block- I am living and learning.

Cheesebeast, how much did all the work set you back?

Thanks for the input.

Amos1909
Cheesebeast  [Member]
8/11/2009 6:49:38 AM EST
Adco charged me $136.00 total including shipping to do the barrel work. Ultrafast turn time, excellent work.

They turned the barrel down in front of the gas block and particularly underneath the handguards. Big difference in weight and balance. Frankly DPMS should offer that barrel profile as stock.

I blew the $$ load on the trigger and went with a Geissele DMR trigger unit. It was about $280.00 (gulp). I wanted a better trigger pull than stock (which was pretty lousy). The Geissele is fantastic, and I don't know if I could get a better trigger unit for any amount of dough.

The Magpul stock was about 95 bucks, and the grip was about thirty. Both were done for comfort reasons. The stock Pardus stock dug into me when I shot the rig off the bench due to the odd "toe" angle of the buttstock.

The first thing I would upgrade on your Sportical is the trigger. You do not need to go insane to get a better pull. The stock pull is too heavy, creepy, etc.

There are a bunch of replacement triggers out there (small pin), and you can get your trigger reworked pretty easily.

I built my Sportical for deer hunting, which is why I was concerned with weight.

Make sure you clean your rifle before you go to the range. It is particularly important that you clean the barrel- and especially the chamber. DPMS does not chrome line their chambers, and any goo that is in there may cause ejection/extraction problems. The stiff bolt action of your DPMS will loosen quickly, so don't worry if it is too "tight" right now.

Enjoy,
I can't wait for deer season!



Aimless  [Site Staff]
8/11/2009 6:50:26 AM EST

Originally Posted By amos1909:

Originally Posted By LARRYG:
Originally Posted By amos1909:
I am confused and need some help,

I am new to the Ar-10 platform. I just bought a DPMS Sportical LR-308 and had purchased a Troy Front and rear sight. I did mount the sights but they do not look right to me. It looks like the front sight is lower than the rear. Can anyone tell me what I am doing wrong or is it just my eyes?

How do I install a sling on a LR-308? I assumed that it would be like my M&P 15OR and would have a mounting spot on the underside of the gas block.

Thanks,
Amos1909




Well, this is the AR10 forum, which the LR-308 is not.

However, I will try to address your question. On the 7.62x51/.308 ARs, the rail on the receiver is actually higher than on a 5.56/.223 AR due to the bigger round. You have to get a particular BUIS for the front. It's a little taller than the one for a 5.56 rifle.

I don't know about sling mounts for the DPMS as the AR10s do come with a normal sling swivel as part of the gas block.

You might want to contact DPMS about that or post that question in the "AR Variants" forum.

Thanks for the input,

I called DPMS and they informed me that the front rail and gas block are higher but that a standard Ar-15 gas block flip sight will work. The Troys are for front fore rails.

LARRYG, this is the "AR Variants" Forum, I was certain that I had selected "AR Variants" but maybe I had made a mistake! But it does say "AR Variants Forum at the top of the page... If I did put it in the wrong Forum I apologize...
Thanks,

Amos1909


I moved it, you posted it in the AR10 forum ;)
amos1909  [Member]
8/11/2009 6:54:49 AM EST
Thanks Aimless and LARRYG,

I was certain I hit the other forum, but when I went and looked they are both there, one above the other...

Sorry for posting it in the wrong forum, my bad....

Amos1909
Aimless  [Site Staff]
8/11/2009 6:55:33 AM EST
forget about it ;)
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