Albroswift

Speaking of parts, what is the roll pin size for the ejector? I was installing the KAK rounded ejector and didn't measure the one I removed/ replaced, but the way things get bent or go flying some times it may be good to have a spare. Do we have a list of all the roll pin sizes somewhere around here?

Yes, Aero is good about that. Not Aero upper and lower, just the parts kits. AMT 80% lower and their stripped upper. Used AMT on the last build, no complaints.

I guess I could take the time to read the description of what I am ordering or look at the pictures, although they don't always agree... On the lower kit they say "Bolt Catch Roll Pin ans show a picture of a roll pin, on the upper kit they say a "Forward Assist Roll Pin" but show picture of set screw. Includes: Magpul MOE® Grip in Black or FDE *M5 (.308) Takedown Pin *M5 (.308) Pivot Pin Takedown/Pivot Detent Takedown/Pivot Spring *M5 (.308) Bolt Catch Bolt Catch Buffer Bolt Catch Roll Pin Bolt Catch Spring *Extended Magazine Catch Button Magazine Catch Body Magazine Catch Spring Buffer Retainer Buffer Retainer Spring Safety Selector Safety Selector Spring Safety Selector Detent 4-40 Set Screw (for threaded takedown pin detent hole) Trigger Hammer Trigger Spring Trigger/Hammer Pins Hammer Spring Disconnector Disconnector Spring Our upper parts kit includes the parts you need to assemble your M5 (.308) Upper Receiver. Includes: Forward Assist Assembly Forward Assist Spring Forward Assist Roll Pin Ejection Port Cover Door Ejection Port Cover Rod Ejection Port Cover Spring Fortunately my upper takes a roll pin and lower takes a set screw so I needed one of each anyway.

That makes sense, except: They gave me a forward assist sized roll pin in the LPK but no BC set screw.

Went with the Aero kits on most recent build, AR308 UPK and M5 MOE lower kit, When building the bottom end there was no set screw for the bolt catch, but there was an extra roll pin. Has an extra screw in the parts bin, finished up the lower, started on the upper, low and behold, screw for the BC was in that package but the roll pin for the forward assist was missing. So they include the FA roll pin in the LPK and the screw for the BC in the UPK. That only works if you buy both kits, otherwise there would be some cussing.

Copy that. It'll be on the bench for a little while, getting out for some hunting. Dragging the trailer down to camp this weekend.

Correct. I'm using the armalite carbine extension kit, so buffer is 5.4 oz as well.

gracias

Going back and forth from messaging Concretus and this thread, he was running rifle length extension tube, 308 rifle buffer, tubbs 308 spring, superlative adjustable gas block.

I searched gas port thread, got 100 pages of everything but that. Like to check it out, point me in the right direction?

it reportedly cycled several different types of ammo both factory and reloads. Don't know what spring/ buffer combo. We are going with an adjustable block anyway and the armalite extension/ spring/ buffer so I'm thinking just go to .080 diameter to start and do my adjusting without several trips between the drill press and the range. That drill press part is stressful! Hunting season starting so probably won't be going to the range for a while.

1:8 18"

18" BA, the one I bought from Concretus a couple of months back.

Going to town on the 6.5 Creedmoor build, checked the gas port, .062 no go .059 go. .875 journal. Mid length gas. Is that the correct port size? Seems small, but nothing to compare to. Interesting factoid, the BA barrel uses the 11-3/4" tube, not the 12-1/16. Assembled with 12-1/16"tube, visually way past center of cam cutout, and confirmed bolt will not close. Didn't have a 11-3/4"" laying around.

.0995, wasn't it? So what I am hearing we may have a good running 308 with a 7" extension and a 2.5" buffer. Kind of where I wanted to go with my next 12-1/2" pistol build using the Tailhook Mod 2 brace.

Do a lot of grinding and stuffing, beer brats, summer sausage, breakfast sausage, chorizo, landjagger, lean beef burger and bacon burgers-- 15 lbs lean beef trimmings, 5 lbs of bacon, grind together and run through the patty press. Freeze in pairs, quick and tasty on the Weber.

Tuna, Pepper Jelly, some wild meat, few other odds and ends. Seems like the lids are costing more and more every year. Never thought of taking pictures!

Uber and Taxi drivers. Not kidding.

R Lee Ermey! What is your major malfunction?

Didn't like the look/ feel/ weight of the ebay hand guard on the sig pistol build, replaced it with a M-lock from AR15handguard.com. Sent me a high profile first but very good customer service, had a return label within a few hrs of reporting the issue, had the correct one back to me a few days later. Good communication. Anyway, got it on tonight, and one of the holes lines up perfectly with the gas block adjustment screw. (The lucky part)

R Lee Emery!

I didn't shoot the 308 before opening it up, but I did the 223's. .078 (5/64") seems good for both. Put an adjustable on the 308, low price/profiles on the 223's, all running great. Solid carbide 5/64" end mill just showed up, have a couple more to do when I get energetic.

how about close ups of the area milled?

After the last round of cleaning I found an extra extractor spring on the table. More concerning also the little one that goes in a 308 extractor. Pulled the bolts out of several AR's, the one in the 458S was in backwards. Flipped it over, got it to snap into the extractor. Sent Tony an email asking him if he uses the little spring inside, or the insert. Put everything back together and back in the safes. Tony emailed me back and said nothing except the spring, and he puts them in backwards compared to AR 15's. Went through the 458 and 2 308's again, flipped the one in the 458, found the 308 bolt missing the little spring, but noticed something funny about the firing pin in the 458. Had a 308 pin in it. Pulled a AR15 pin out of my field kit, swapped it out. Now my field kit has 2 spare .308 pins and no AR15 pins. I would swear I always carried one of each. Pulled and checked the 308's, they have the correct firing pins. I'm getting pretty good at this. Just wonder who's kit has 2 AR15 pins and no 308 pins and where the extra extractor spring came from.

I went with the Aim Sport on one of my AR15 builds, good quality good price fairly light weight. Thinking about using one like this on my next large frame build. https://www.primaryarms.com/aimsports-ar10-15in-mlok-dpms-high-handguard-blk-mtm15h308 One thing to consider though, the slots on the bottom do not go down the center line so might have to use side mount bi-pod legs. Maybe also check out https://www.ar15handguard.com/ Sam Pan is a character but he has good customer service/ returns/ replacements.