Pic Request - 18" Barrel with Rifle Length Gas System

**11Bravo** · 07-20-09, 20:23

Tossing around (very tentatively) the idea of a SPR build with an 18" Barrel with either a mid-length or rifle length gas system; leaning towards the rifle system.
Anyone have any pics of this setup?

Thanks,
Greg

**Failure2Stop** · 07-20-09, 20:32

Check out the Centurion Arms SPR Sticky.
Lots of good pics of the Mk12 Mod 1 and Monty's clones.

Here's a pic from the thread-

**11Bravo** · 07-20-09, 21:05

Oooo, cool.
I have looked at their site; guess I just brain-farted it.
I would like to see more samples if anyone has more.
Maybe one with a fixed sight base.
That one from Centurion is kewl.

**Sam** · 07-20-09, 21:54

Not mine, I found this a couple of pages down.

**USMC03** · 07-20-09, 22:17

A pic of a 18" White Oak SPR barrel with rifle length gas system. Built it 2005. Used it for a couple years and sold it.

Run and gun rifle match targets from 0 to 425 yards:

The SPR profile barrel was heavier than what I would have prefered.

S/F,
Jeff

**Robb Jensen** · 07-20-09, 23:34

My 3gun rifle as current as of today 7/20/2009, it's a work in progress.

18" WOA SPR 1-7 twist .223 Wylde chamber barrel turned down to .650" under the rail (courtesy of W.A.R. Rifles). JP adjustable gas block LMOS carrier and close range sight, BCM bolt, KAC Triple Tap comp, VLTOR MUR upper, DD RIS II M4A1 rail, Bobro forward grip and 30mm scope mount, Burris XTR 1-4x 30mm scope, Charles Drissel 'cat-tail', Troy FDE flip up sights, PRI gas buster charging handle, Tactical Innovations lower, Geissele trigger, LMT SOPMOD stock in FDE, Magpul XTM covers, MOE grip and MS2 sling and PMAGs, Arrendondo mag button. Assembled by me 'gotm4'.

**mike240** · 07-21-09, 20:20

I too am toying with building a new upper based on some parts I have lying around....

I am wondering if anyone has a 16 inch barrel on a rifle gas system? Bruce Piatt seems to like them as I read on the Enos forums...all the talk about different recoil etc....

What about harshness on the parts? How will it recoil differently than my 16 inch midlength?

I have a Colt 20 inch Govt 1/7 barrel that I am considering having cut and thread to 16 inches and having a Colt "F" sight base installed on so to be correct with a Colt M16A4 upper. The BCG would also be Colt and to top it off I have a LT 12.0 rail.

I like the long handguard length the way I like to shoot the longer guns and want a fixed front sight base and the long sight radius (older eyes) but do not have much use for 20 inch barrels.

Besides, I have all the parts, just need the barrel work done.

**FromMyColdDeadHand** · 07-21-09, 23:28

Originally Posted by gotm4

My 3gun rifle as current as of today 7/20/2009, it's a work in progress.

18" WOA SPR 1-7 twist .223 Wylde chamber barrel turned down to .650" under the rail (courtesy of W.A.R. Rifles). JP adjustable gas block LMOS carrier and close range sight, BCM bolt, KAC Triple Tap comp, VLTOR MUR upper, DD RIS II M4A1 rail, Bobro forward grip and 30mm scope mount, Burris XTR 1-4x 30mm scope, Charles Drissel 'cat-tail', Troy FDE flip up sights, PRI gas buster charging handle, Tactical Innovations lower, Geissele trigger, LMT SOPMOD stock in FDE, Magpul XTM covers, MOE grip and MS2 sling and PMAGs, Arrendondo mag button. Assembled by me 'gotm4'.

Just like mine.... I wish.

My 18inch LMOS upper is on its way, what weight buffer do you run? The real LMOS buffer is rifle length so it won't run in a carbine reciever extension like in your set up. (I'm going to run an UBR).

**Robb Jensen** · 07-22-09, 06:41

Originally Posted by FromMyColdDeadHand

Just like mine.... I wish.

My 18inch LMOS upper is on its way, what weight buffer do you run? The real LMOS buffer is rifle length so it won't run in a carbine reciever extension like in your set up. (I'm going to run an UBR).

I'm using a CAR buffer (the lightest one I have, 2.9oz). A normal CAR buffer and JP LMOS rifle buffer both weigh 3.0oz. I was using a 1.8oz that I took some weights out and replaced with Delrin but it proved to be not quite reliable enough. I use a standard rate chrome silicon spring from Brownells. The UBR uses carbine length buffers and springs so you'll be able to use a CAR weight buffer. Eventually I may use a UBR stock in FDE on this gun.