Floydieguns

Roger that, sir. Appreciated. Forever more, I stand corrected keyboard cowboy. I think you are the one with issues. Big issues. Shepp, google shilen or pacnor. Those are barrel blanks. They come in straight cylinder profiles with no chambers cut. Appologies, for upsetting that aggrandizing troglodyte 98 something other. You all keep to this band of misfits. Understand the action? You are using an offset part to accomodate a tube that is too deep internally. Why can you not weld and repair the damaged buffer detent alongside flat filing the required depth off? Oh yes.. just replace parts. I am out fellas. I appreciate those of you whom were truly experienced.

You know.. pinching slides in vices, peening and hard lapping receiver rails used to be 'milspec'. No self-respecting gunsmith has done this since 1980. There is no rant. Nor did I proclaim anything. Please cite this via quote. Real gunsmithing requires fusing and file driving. I appreciate your continued attacks. I never said I was boring a barrel. You have horrible reading abilities. The best thing you have shown me is your ability to part-swap. I have asked multiple times, "why not 'repair' the fault?". I thank you, for validating my points.

First, clarify. Second, do you have a reliable source of forged 80%'s or not? Third, did you not tell me to bore a barrel for correction of misaligned gastube/gasblock? Fourth, did you not get in a disagree about using loctite versus mangling parts? I would appreciate out of mutual respect.. because your rectal cavaties stay out my shop and mine stay out yours.. Be polite, stay on topic.

Machining and real gunsmithing are one thing; Sourcing viable parts are another. Your comment was taken with grin, as should be mine.

I was guessing you implied carburization with the first comment. Yeah, it is costly any way around. Plus, the time for turn around. You have to be doing large numbers. For a small shop, parkerizing or bluing still ring in as most commercially viable. Many reasons why. Cost, consistency in time/result. Outsourcing a large house to do this for me.. not happening. A bottle of propane and a few hours does park/bluing. The cost of propane alone is absorbed in shipping. Chemicals at my end are less than a single batch of nitride salt bath. Plus - you must send the barrels out before drilling gas port and the barrel extension cannot be installed when discussing AR platforms. Due to distortion and the difference of metals. More time, more cost. Just blow this barrel out then I will spin and time you a new one. I will oil soak the parkerized AR barrel for a few days before installing it. Most float tubes will keep it from being scratched off. Even then, it is not that challenging to oil yourself. If parkerized carbon is not going to float - I can do stainless but those blanks I do not stock. Additional costs will be transfered in full to customer.

I found a crop of 0% cerro forge 308 dpms lowers and uppers. That is a bit more than I care to go in to. If a cnc house were offering them in 80%.. I would be buying. That is beyond my tooling and time investment interests. Appreciated. Unsure what this 'carbon treatment' is you speak of. I was looking at pacnor and shilen bull blanks. Going to stick with parkerizing because of cost. Oxide blasting and parkerizing in house will be peanuts. A few places offered 80% lowers with an upper.. but out of stock for the last six months.

What receivers are out there with good review? Any solid 80% receivers with no frills? Which uppers lack forward assist? With standard rail profiles. Prefer forged receivers when possible. My matched billet set is great. However, it has unneeded extras. Looking to do a complete project. Who here makes their own barrels out of blanks? Have a few 308's with the hybrid contour 416r nitride barrel from criterion. They are nice. I am setting up for parkerizing and am selecting 4140-4150 blanks. Have mill and lathe.

A quick look at this 'offset' retaining pin.. i suppose.. gtaw + er70 and a little time with hand files.. I understand the purpose of this item. That many out of spec receivers circulating for such a part? Alternatively, why could a person not take a large bastard file and slowly remove material from the receiver extension tube itself? Even filedriving should prevent buggering threads. A triangle file at most would be needed for pointing the end of tube threads again. An overly long tube could also cause the carrier to crash against lower receiver? *** I skimmed the topic. It seems the recommended part may correct misaligned bore for buffer retainer pin or alternatively an overly long receiver extension tube? In more than twenty rifle builds with small and large frames.. never have had this issue. Perhaps Lady Luck has smiled on me so far. Not trying to insult, naysay or otherwise. Am I understanding the part swap solution?

I got a 1911 that was rollmarked 'gold cup' from colt. Totally learned how not 'national match' their new products were at that time. The shop owner sold it for about $300 over the standard price. That happens to all of us. Keep in mind the supply/demand and markets swell/decline of value.

Bummer, man. Let us know what they tell you is the fault. Maybe it comes back with a new bolt

Potential issue with either the bolt having machine chatter.. or damage happened on trip to the plating facility or the barrel extension could be to blame. The bolt lugs that were damaged/indicating wear meet at the feedramps of barrel extension. I would have gotten the self-drying blue out and cycled it by hand. Seems almost like a stackup issue with the bolt&extension. Nickle boron is like a chrome plating. Granted it may be 'space aged' and 'more spiffy'.. it can have variance in the coating between piece to piece. Alongside machining tolerance. Excessive stackup could be occuring. The gas will make it run. Everything gets hot and expands. The "nib" may not expand fast as barrel extension. When cooling down, could be stiff. However - if it has a faultless warranty.... That stated - never buy for a warranty. Buy for not needing one.

How does the barrel extension look? Just.. curious

Right on. No sweat brotherman. Take your time. I am still in the research phase. All the more info, the better. I thank him and you also. Very much.

**failed to edit** Is the xtr12 upper the same inner diameter as a dpms/sr25 standard? Bolt carrier and buffer lengths also 'generic'/'standard'? Thank you

Really, only a one ounce weight and a 223 lightweight action spring? Robocop, will you post some pictures of this bolt and barrel extension? The shotgun barrel will be very lightweight when compared to a 308barrel. Being proofed for less than 25,000psi and such a large inner diameter.. Only eight rounds? I have already seen people making magazine extensions for ten or more. Multigun performance shops. It is the standard inner diameter of upper receiver as a dpms/sr25? Anything different about the carrier or buffer length?