JP LMOS carrier

[MickB]

With a good muzzle brake already in place and a standard CAR buffer, is there any extra benefit to using a JP Low Mass bolt carrier without the adjustable gas block?

Mick

[Jesse Tischauser]

Yes.

[bagdrag]

Yes. I believe there is just as much benefit with the LMOS carrier as there is a good muzzle brake. You don't necessarily need the LMOS buffer if you're running a CAR buffer.

[carbon9]

Another option is the Young MFG SLC(super light carrier). The nice thing about the Young MFG is you can just give them a call first, then drive over (35th Ave, North of Thomas) and pick it up. Damn, I sure love PHX. Nothing against JP, I just like to keep it local when I can. It is a touch heavier then the JP LMOS but I just put one in a 16" midlength gas build, no adjustable gas with Nordic Corvette Comp and it doesn't even move. This is with a normal weight rifle buffer, I haven't tried it with the JP buffer yet.

[MarkCO]

Yes. I believe there is just as much benefit with the LMOS carrier as there is a good muzzle brake. You don't necessarily need the LMOS buffer if you're running a CAR buffer.

Ditto!

I've been running 16" rifles at around 6 pounds this year set-up exactly that way with a Nordic Corvette. Very flat.

[PacMan]

With a good muzzle brake already in place and a standard CAR buffer, is there any extra benefit to using a JP Low Mass bolt carrier without the adjustable gas block?

Mick

Yes.

However, the combination of good brake + LMOS carrier really shines when you can tune the gas system to match, especially in a 16" carbine. Fortunately, an adjustable gas block is the cheapest part the whole deal so if you already sprung $ for a LMOS carrier, might as well go all the way

[JaeOne3345]

Nevermind, question already answered.

Edited May 26, 2011 by JaeOne3345

[bagdrag]

With a good muzzle brake already in place and a standard CAR buffer, is there any extra benefit to using a JP Low Mass bolt carrier without the adjustable gas block?

Mick

Yes.

However, the combination of good brake + LMOS carrier really shines when you can tune the gas system to match, especially in a 16" carbine. Fortunately, an adjustable gas block is the cheapest part the whole deal so if you already sprung $ for a LMOS carrier, might as well go all the way

I'm debating the usefulness of the adjustable gas block when some of us train with plinker ammo and use something different for matches. I'm certain tuning the gas block could make a noticeable difference but it seems like you lose some versatility.

[MarkCO]

I'm debating the usefulness of the adjustable gas block when some of us train with plinker ammo and use something different for matches. I'm certain tuning the gas block could make a noticeable difference but it seems like you lose some versatility.

On a 16" gun with mid-length gas and a gas port of a reasonable size, there is not much gas to tune. I'd much rather keep some reliability and tune my loads a little bit.

[bagdrag]

I have an 18" Rifle-length AR, but still I'm not leaning towards adjusting my gas block.

[MickB]

Never thought of Young's and didn't know they were in Phoenix!

I'll be picking up one of their Super light carriers tomorrow.

Thanks for the tip.

Mick

Another option is the Young MFG SLC(super light carrier). The nice thing about the Young MFG is you can just give them a call first, then drive over (35th Ave, North of Thomas) and pick it up. Damn, I sure love PHX. Nothing against JP, I just like to keep it local when I can. It is a touch heavier then the JP LMOS but I just put one in a 16" midlength gas build, no adjustable gas with Nordic Corvette Comp and it doesn't even move. This is with a normal weight rifle buffer, I haven't tried it with the JP buffer yet.

[MickB]

When running the low mass carriers, is it adviseable to change to a different recoil spring or is the standard CAR buffer spring perfectly fine?

Mick

[norbs007]

Standard is fine.

[MickB]

There's a special buy on Young carriers going on till the end of May.

I just picked up a carrier and a complete bolt/carrier assembly at a pretty good discount.

http://calguns.net/calgunforum/showthread.php?p=6459800

You'll have to call and speak to Dave about the Super Light carriers

Mick

[Kevin Holman]

Given the choice between a CAR receiver extension and buffer, vs a rifle extension/buffer..... which would you choose?

I was under the assumption that most ran rifle extension/buffers and they were softer recoiling?

[Vespid_Wasp]

I took three weights out of a standard rifle buffer and replaced them with delrin. Same weight as the JP buffer now.

[assaulter]

I've got an 18" Intermediate length gas Noveske Bbl that I run with a standard rifle buffer in a PRS stock. If I dropped in a low mass carrier, can I expect it to be reliable without the adjustable gas block?

[mpeltier]

I've got an 18" Intermediate length gas Noveske Bbl that I run with a standard rifle buffer in a PRS stock. If I dropped in a low mass carrier, can I expect it to be reliable without the adjustable gas block?

Should be if all else is working properly. I would recomend also lightening the buffer for best effect. And use quality ammo. Watch for extraction issues as you lighten it up. If the case heads show signs of bieng overworked a tad, add weight back to the buffer a little at a time.

For those with rifle length gas the adjustable gas block works great with consistant ammo and proper adjustment. Most every issue I have seen with them was ammo/adjustment related or an improperly set setscrew that backed in or out. If you use a lot of differant brands (as in whatever is on sale) of ammo a standard gas block would serve you best.