survivalshop

Contact the Manufacturer yet ?

These guns were on consignment & the owner wanted them back or some of them , what was the problem that they served an arrest warrant for the dealer to get them back . TV show gun shop , was probably enough for anti's to go after him. Whats with these TV Gun Shows getting into trouble ? Its not like there's a lot of them . https://gma.yahoo.com/american-guns-reality-star-richard-wyatt-arrested-theft-015044698--abc-news-celebrities.html

I don't even want to thick about getting a replacement part . $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

Maybe that's how he got his name ? <dontknow> <laughs>

Well I stand corrected , in a way . I was not completely satisfied with the measurements , mainly because I knew I had to assemble the RE on the Lower Receiver to be sure nothing changed when all assembled & working on a complete rifle . As you will be able to see in the Photo's , the Buffer can be pushed back into the RE . far enough , by using the Charging handle , like you were charging the rifle with a loaded Mag. , that the Buffer is barely touching the bottom of the RE., but also note that the spring is fully compressed . The real question is , does it go that far under normal recoil when fired . I can see using high pressure loads , it could go that far every time , but not using normal pressure factory or hand loads . Having said that , its only an assumption on my part , because I will have to find some way to record normal reciprocation distance of BCG travel , Now that is going to be a challenge. Using the BCG with the Charging like normal operation , I'm not sure why there is a difference in the compression with a Shotgun cleaning handle & a completed rifle ( well , almost complete , no barrel ) . The only thing I can think of is even though I had the Cleaning rod in the middle of the Buffer , it must have been cocking the Buffer some what , not sure . Could also be the mechanic's of the complete system, all I know is , its different & my first tests with RE , not attached to the Receiver . Also note that if it is touching the back of the RE . , its not much of a touch , so I still believe that under normal conditions , it will not touch under recoil . The 4 1/2" mark made on the Bolt Carrier & how far it travels into the RE. & there is no way I can see BCG touching , even with the complete assembled Lower /Upper . Understand that I'm using a great deal of force to hold it there as far as I can get it in the RE. . You can see the 4 1/2" mark on the side of the Bolt Carrier , if you look close . What I didn't expect was where the Buffer was in the RE, the Buffer had went deeper in the RE by an aprox. 1/8" . If you look at the photo's from my other post , you can see that by using the Cleaning Rod & bottoming out the Buffer assembly , is about 1/8" from the Buffer touching the bottom of the RE.. This photo has the DPMS 308 Carbine spring in . Other photo from above post This one shows the Tubb's CS flat wire spring . Notice the travel with the Tubb's spring is just shy of the mark made to show the Buffer touching the RE> bottom . This photo shows the Buffer's position in the RE with the BCG held by the Bolt stop . The thickness of the where the Buffer Spring seat & the Face of the Buffer where the BCG touches is only 0.257" , so there is a fine line on how much more the BCG travels past the Bolt stop before it bottoms out , doesn't matter if its the Buffer or Spring . I think the main point here is ,that if you have the proper corresponding components , you will not have a BCG hitting the Lower Receiver threaded are .

Good job , but a lot of work for a hand guard that should fit from the Manufacturer . Sure is nice having a CNC around <thumbsup>

The Custom motorcycles are all nice , but when you put that $ next to them & only build fifty a year , they only for those who have it to blow . My way of looking at it is , if that "same bike "was fifty years old & was ridden day to day , & it was still around in working order , it would probably interest me .

Its not hitting the Plunger , the BCG is hitting the threaded area of the Lower Receiver . There's no doubt the Receiver Extension is too deep for the Buffer/Spring system that would normally work with a std. Carbine RE. I took a depth measurement with the Tubb's Buffer spring & there is no difference in where it bottoms out , in fact it may be less than the DPMS Buffer 308 Carbine spring. I couldn't take a Photo because my Camera woman was not out of a sound sleep yet , but what I did was drop the DPMS 308 Carbine Buffer in the RE & mark it , so I could see how far or deep the Buffers relationship in the RE was , with the system fully compressed & bottomed out . The gap between the Spring seat on the Buffer & the Face of the Buffer where the BCG touches , is 0.257" , so about a 1/4 " & from looking at the mark on the RE , the bottom of the Buffer will set off the bottom of the RE ,about half that with the spring bottomed out CS Tubb's flat wire spring , still measured about 4 1/2 travel to stop & you can see the mark I put on the RE to show the top or face of the Buffer would be if it was touching the bottom of the RE . Here's the DPMS 308 Carbine Buffer Spring . I can tell you this , the Tubb's spring is a bear to keep compressed all the way & so was to some extent the DPMS , but the Tubb's was stiffer than the DPMS in almost all of it tracer . Where the DPMS got tight close to the last inch or more of compression . I will take measurements next of the relationship of the BCG with in the RE , with the BCG set in the RE @ that magic 4 1/2 ". I think if you keep that spacer or one like it in the bottom of the RE, it should work , to keep the BCG from hitting the Lower Receiver. No idea how your new components will work .

Well I took some photo's & also did a little Surgery to one of my old Commercial Carbine Receiver Extensions , No real idea of round count , but well over a thousand rounds , from my 16" 308 . Buffer & Spring are DPMS Carbine 308 The RE measured real close to 7" , Maybe 6 15/16 " ,but close. With the Buffer/Spring fully compressed , full travel of the Buffer is 4 1/2 " , that only leaves 2 1/2 to the bottom of the RE . Correct ? With the Buffer/spring collapsed to the 4 1/2 " ( fully compressed till it stops ) , the spring is fully compressed & because of the lip the Buffer Spring sets on , it doesn't go all the way to the end of the Buffer , so no way the Buffer can hit the end of the RE , the Spring is fully compressed & the Buffer end is about 1/2"( close estimate ) from hitting the end. Just for me , I was wondering , this being a Commercial stock , if the inside of the RE was shaped like the outside , an angle . Well its not , its been milled to be flat , but when I looked at the bottom , the only mark I could see on the bottom was the Buffer Spring seating area , no other marks , like from a Buffers , Nylon Bumper , it should have left some kind of indication it was hitting , not even a scuff on the Finnish . If too long of a Buffer , with this set up, I could see it hitting the bottom . Here's all the parts & tape measure is for reference only . You can pretty much figure that Bolt Bounce is not caused by the Buffer hitting the end of the RE , its bottoming out the Buffer Spring . Your Spacer just moved the end of the RE , to make it shorter , keeping the BC from hitting the Lower Receiver & Extension. If you are over gassed , I would think it will force the BCG/Buffer to compress the Buffer Spring fully , which could cause Bolt Bounce . Seems a balance of components & gas signal , keeps the Buffer spring from fully compressing . It may get close though . Now the Tubb's spring , I have not measured yet , but will in the morning . I'm curious .

I don't believe the Buffer is supposed to bottom out all the time against the Receiver extension . It would put too much stress on the Lower Receive & its Extensions threaded attachment area . I do believe the bumper is there in case it does & it should be sufficiently slowed by the Buffer spring & the Mass of the Buffer to not hit with any damaging authority . Thats a hard Nylon bummer on there , if it were a continuation of the Buffer material , it would not only make a lot of noise , but would probably crack the Receiver Extension , pretty quick . The back end of the Buffer also acts like a guide for its travel in the spring ( its why it has a taper at the end to it ), keeping the Buffer & spring from wedging its self internally in the Extension . With the spring collapsing from compression , it has to be contained & guided through its travel upon recoil of the action . If you read my last post , the three things , Buffer , Spring & gas system all work & are supposed to be factored in together to keep the action working to spec's. If you keep all components with in the known working system , there is no problem , its when a manufacturer deviates from those known working components , that there are fitment & function problems , as we have seen here with this Receiver Extension. Also do not confuse Blow back operated actions with a Gas or Piston Action system . Blow Back systems use a buffering system also , but its just an over travel stop & has no regulated gas system ( Port size ) and they have no Buffer ( Mass ), the Recoil spring or Action Spring is the only thing slowing the action down enough to keep from damaging the Receiver or internal components . What is the gas system on this Barrel ? You are right 98 , this high Dollar Receiver Extension is made too deep for normal internal components .

It would solve the issue of the the BCG going too far back . A heavier Buffer would slow the reciprocating action of the BCG down & may actually help . Its not only weight of the Buffer & the resistance of the Buffer spring to slow or Buffer the speed , but a timing thing also . The weight of the Buffer & the Buffer spring resistance , that slows the action down so the system functions as it should . As you pointed out the other factor is the Gas Volume & Pressure & they all contribute to the timing of the action , they have to work in unison to stop the Buffer from hitting the end of the Receiver Extension . Too little gas , of course , will effect it the opposite , BCG , Buffer/spring will not go back far enough to function properly . Have you measured the Gas Port in the Barrel ?

I can picture , POPEYE Biceps . <lmao> I think 8# for a hunting rifle is , well , on the heavy side , but I haven't weighed the Hunting firearms I use . 8 # may not be a big deal , being a good scope is going to weigh more than a inexpensive one . If you really look at some of the semi auto rifles out there , even in some Magnum calibers , they are not as , how can I say , over built , so to speak , as far as their make up . Where even an AR 15 is built pretty good , when compared . That may be part of the extra #'s a 308AR has . Over built X 2 , look what DPMS did to the GII , they seemed to shave some #'s off & still kept the same basic platform . Still , walk around with the Rifle all day & see how you feel about it . <dontknow> You know what could be a good new profession , Pro Rifle Barer , it would be like a Golf Caddy , 308AR for that Deer or a 300 WM for the Elk , 'Sir " <lmao> " Its about 300 yards "

Ironmoster , with the BCG in the the lower , like it would be in full recoil & with the Bolt set against the Bolt Stop , as it would be with an empty Mag. in , looking it back , does the BCG hit the Rear of the Lower Receiver ? This is done of course with out the Upper Receiver & Buffer? Spring . Photo?

Nice.

That's a light Barrel . I wonder , do we weigh our hunting rifles ? I have never compared , but I will today. A lighter Barrel definitely helps bringing any rifle up to take a shot or scope game . The 308AR I'm building now will be as light as I can get it , it will be a hunting rifle & since I have a 16 & 20" , I will probably go to a light wt. 18.5 " or maybe if they have a light 16"bbl.. Haven't made my mind up yet .

That's 2.4 lb. on the light weight 18.5 <laughs> I think my 16" HB weighs around 2.9 lb. also .

They came with no paper work from what I read in the posts , doesn't matter who they are for . I would not accept a Title II registered item with out proper paper work . I have gotten them before & they were shipped back ASAP , after talking to who I was doing business with . I got one once , it was a British Sten gun , had Form three with it , but for another dealer & it was in the same box as the Class three Machine gun I was waiting for ! ( there's a good story about that ) Possession of an unregistered Class three item , you could get into big legal problems , not to mention jail time . You never know who may be monitoring these transactions .

I shoot a lot with an adj. sand bag rest , for testing hand loads , not as elaborate as those , but pretty much the same thing . Probably ends up who loaded the most accurate ammo that day. Its different , I'll give it that . <thumbsup>

Yep !

I can't grasp the price ether . What I don't understand is , how can the BCG come back too far with a Tubb's flat wire spring , that's one long spring , it is supposed to compress more , because of its design , but still , thats a lot of spring . Here it is next to a DPMS 308AR Carbine spring . Something is not to spec's in the Receiver Extension. Op said its 7" deep & that's correct , maybe the Tubb's FWS is for an AR 15 & not a 308AR ? I would like to see the Lower Receiver & extension photo's with out the Upper attached , inside & outside & a photo of the BCG with a measuring scale next to it . . 98 is right , this is the second one in just a few days .

Here's Criterion Barrels offerings , with some in stock . http://criterionbarrels.com/media/News/cbi-new-product-announcement-march-2015

That midway kit is the one I opened to show the parts . PM me your address & I'll throw it in a envelop , no problem . I have a used spare complete bolt & extra springs , if I need something .

There's a thread around here some where on the JP SC spring set up . Read what the owners & users have to say about it . You can't go wrong with the AR10 system though . Wait , did I say that ? <laughs> Here's the Thread

I'll send you this one if you want .

For hunting , I would go with the lighter weight also & I would think the Stainless would have a slight edge in accuracy . I would think the Stainless would do well in the elements , wouldn't think twice about taking one out Hunting . Once the action is broken in , I think you will find both Barrel types , will be quite accurate at moderate ranges . I like Criterion Barrels , I have two of them in 308 AR's.