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MickB

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Posts posted by MickB

    JP LMOS or Young's LW

    in Rifle - Technical

    Posted

    It don't matter as long as it works.

    I'll be testing the Young's Super Light carriers this weekend and report back on reliability, recoil impulse versus a full weight carrier, etc.

    Mick

    Absolutely! We all need higher level shooters to determine if we should get one! :rolleyes:

    JP LMOS or Young's LW

    in Rifle - Technical

    Posted

    And there's another National Champion at Rio Salado that prefers no FA, and went so far as to push Sun Devil to make uppers with shell deflector but no FA.

    I paid nothing for that info...

    :)

    Mick

    Sure. Listen to the right people.

    I took a class from this guy who has won SMM3G, the Nationals, Rock Mountain, Fort Benning, etc. He prefers an upper with a dust cover and an FA.

    I paid $600 for that info.

    Having some trouble with my Tac Sol Upper

    in Rifle - Technical

    Posted

    Sounds like you're getting there. When you talk with Lon at Tac Sol, have him send you a couple of extractor springs, if not a new firing pin as well.

    I'm wondering if the spring is weak, and the shell is slipping a little, meaning its getting hit by the lower beveled portion of the firing pin.

    A cut down 10/22 extractor spring also works and you can use that to tune the extractor tension.

    How is the ejection? If the empty case is just dribbling out, then that is a clue.

    Also make sure the face of the chamber is clean and there is no crud stopping the bolt going fully forward.

    Mick

    OK so I polished the piece that runs in the charging handle to a brite mirror finish. I made sure there were no rough spots anywhere on the bolt or carrier. I made sure the breech and chamber were perfectly clean. I looked at the hammer and it is flat with no notch.

    I took the firing pin out again and looked at it and it seems to be OK. It moves in the chanel with no resistance. I did notice that when pushed flush with the back of the bolt, the pit itself doesn't stick out very far. To get the tip even with the edge of the cutout that the shell fits in, the back of the pin needs to be pushed inside the bolt. I would guess this is by design as you would not want the pin to touch the breach face.

    Anyway, after all that I cleaned and lubed it again and took it out with 75 rounds. The first thing I see walking out to shoot is a ground hog that has been tearing up my barn floor for a while. He is in the field about 150 yards out and 10 or 15 yards from the barn. TMALSS the gun may not run all that well but it shoots very well when it does. 1 shot = 1 dead ground hog. He got about 5 or 10 feet before he fell over dead. Sorry for the distraction but I was getting pretty sick of the holes in the barn floor.

    So I cleaned up after the ground hog and went and set up some steel to shoot at. The gun is better but I still got 3 FTF out of the 75 rounds I shot.

    I did get a call back from TacSol today but of course I was in a meeting and could not take it. I left another message.

    This picture is with the pin pushed in as far as it will go.

    Loki Free Float handguards?

    in Rifle - Technical

    Posted

    Great to hear. I'm building a lightweight upper for my son to learn to start shooting matches with. Base will be a Daniel Defense 16" lightweight barrel, midlength gas with pinned low profile gas block.

    I was originally looking at an MI SS12 handguard, then noticed the Loki. I'll probably go with the Loki...

    ;-)

    Mick

    Having some trouble with my Tac Sol Upper

    in Rifle - Technical

    Posted

    You can polish the area under the bolt that rides over the hammer as shown in your pic.

    You must use a rounded hammer in these setups. Are you using a notched hammer, by chance?

    The area I was referring to is the part right in front of the recoil spring assembly that sits on top of the bolt.

    This part rides in the charging handle slot in the upper. Any drag here can stop the bolt coming fully forward.

    Do you happen to have one of the CMMG "anti-jam" charging handles or filled the charging handle with epoxy to make one?

    I ask because I've seen these types of issues before.

    Mick

    My Tac Sol upper runs fine on a JP trigger/hammer.

    Also runs fine on another lower with bobbed DPMS hammer and JP yellow springs.

    You might have a little drag on the bolt, not allowing it to come fully into battery.

    Look at the assembly immediately in front of the recoil spring.

    Any marks there?

    if so, you have some dragging going on.

    Take a dremel felt wheel and polish up the sides to a nice mirror finish.

    problem should go away.

    Mick

    That is very nice to hear. When it runs I like the upper a lot.

    I took the bolt back out and took a couple of shots of where I see it rubbing. All are around the back of the bolt where the recoil spring is. Just to make sure before I take out the dremel, that is the area you are suggesting that I polish?

    JP LMOS or Young's LW

    in Rifle - Technical

    Posted

    Yes. It's the carrier that is reduced mass.

    A JP low mass rifle buffer is basically the same weight as a standard carbine buffer.

    Mick

    would a person be able to simply swap bolt carriers and notice a difference? Im assuming that getting the whole package (bolt carrier, bolt, low mass buffer) would be the ideal way but would just a single part even be worth talking about?

    Having some trouble with my Tac Sol Upper

    in Rifle - Technical

    Posted

    My Tac Sol upper runs fine on a JP trigger/hammer.

    Also runs fine on another lower with bobbed DPMS hammer and JP yellow springs.

    You might have a little drag on the bolt, not allowing it to come fully into battery.

    Look at the assembly immediately in front of the recoil spring.

    Any marks there?

    if so, you have some dragging going on.

    Take a dremel felt wheel and polish up the sides to a nice mirror finish.

    problem should go away.

    Mick

    JP LMOS carrier

    in Rifle - Technical

    Posted

    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.

    Upper Receiver Choices

    in Rifle - Technical

    Posted

    If you want something a little different, Sun Devil is now making a flat top upper with shell deflector but no forward assist.

    Also has no M4 feed ramp cuts, so they can be used with either rifle or m4 barrel extensions...

    Most forged upper and lowers come from a handful of forging houses. They are then machined to final dimensions. Some do the machining in house, others contract out the machining and final anodizing.

    I always like to make sure that the end of the receiver (where the barrel nut threads begin) is exactly perpendicular to the rail (stand it up on a flat surface and see if it leans).

    Mick

    POF Gen III Lowers?

    in Rifle - Technical

    Posted

    Does your POF lower have the tensioning screw like the Mega and Sun Devil lowers?

    Mick

    Not sure what gen mine is, but it has everything mention above minus the ambi thumb saftey, which can be installed anyways, but I love mine.

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