BIGTRUCKNUT

Kiwi, I went around and around about the barrel length too before I finally settled on the 24" in the pictures here. That's a 24" barrel and another 2" of compensator. I'm not home to check overall weapon length for you but my LR243 as configured with the Magpul PRS stock is about 1 1/2" shorter than my Savage model 112 243 with 24" barrel. I too figured that I could have it shortened if I didn't like it but so far I'm digging it.

Thanks for the scoop, I picked up 10 boxes also. Ty

Youngest just recently home from college. After today, says she wants one of her own.

Took the .243 out for a test drive today and it performed flawlessly! Just 3 rounds to tune the gas block after opening up the gas port to .094" as suggested. Then the youngest daughter and I took turns tearing the center out of a target at 100 yards and busting clay birds on the berm at 300 yards. Can't wait to develop handloads for it and try it at 600 to 1000 yards. Thank you again for the help.

So at 24" and rifle length gas system I guess that the suggested port size of .099" was spot on. Can't wait to test it Saturday if the ranges on Quantico are open.

Well I pulled the gas block off to measure the gas port - it was .060". I dug through my drill bit collection to find a suitable bit to open it up a little. Ended up with a 3/32" bit (.094"). Before and after photos below. All back together with 308 rifle length buffer spring reinstalled; waiting to test fire this weekend.

Inserting a dowel is a great tip, thanks.

Thanks for the input. I'll pull the gas block off again tonight and check the port diameter...and drill as necessary. Keeping my fingers crossed that it's that easy. Plan on test firing it again this weekend at the Quantico ranges if they are open. Will let you know how it works out. Ty

Thanks again. Already made my first post asking about adjustable gas system, springs and buffers and you've pointed me in the right direction.

Roger, I get it. I'll check the gas port diameter as it compares to my functioning 308 barrel. About what diameter should it be? I'll also swap in a regular gas block and put the 308 buffer spring back in and see if that works. Thank you, Ty

Yes, I can lock the bolt to the rear manually and yes, I verified that it is in fact a 308 buffer. As a matter of fact, I was using this complete lower, stock and buffer assembly included, with my 308 upper until about 3 weeks ago. Never a problem. Maybe I should try a regular gas block and see what happens? Appreciate! Ty

Hey y'all, new to the forum and already picking your brains. Poked around, did a few searches, and read up here and on other sites but never got a definitive answer to an issue I had with the gas system/buffer assembly on my first time at the range with the new LR243. I had 3 goals last weekend on the range: 1. break in the barrel (shoot and clean, shoot and clean, etc etc), 2. get it to print on paper at 100, and 3. tune the gas system. I accomplished 1 and 2, failed on 3. Rifle is built with the following: - Aero Precision M5E1 upper and lower receiver and BCG - 24" X-Caliber barrel (8:1 twist) and compensator in .243 Win - SLR .875 adjustable gas block and rifle-length gas tube - Magpul Gen 2 PRS 308 stock - Aero Precision 308 rifle length buffer and spring This is my second LR build, the first being a pretty conventional LR308 from Aero Precision M5E parts. It shoots and operates fine. Tried to get sexy with this .243 though. As I said, wasn't able to tune the gas system completely. Since I was shooting cleaning, shooting cleaning and also trying to tune the gas block at the same time, I only loaded the magazine with 1 round each time to fire in order to tune it to get enough gas through to lock the slide to the rear - it never made it that far. The bolt came back far enough to eject the casing but not lock. Was shooting cheap American Eagle 75 grain varmint ammo and put 24 rounds through it in about a 2 hour period. When I got home I pulled the gas block off and confirmed that it was positioned over the gas port correctly. It felt like the 308 buffer spring was too strong. That said, after looking all over the internet I determined that the AR308 rifle-length spring has about 6-8 pounds additional compressed spring weight over the AR15. I found a warning on this site not to use AR15 springs in AR308 applications. Question is: Does the aforementioned buffer spring warning apply for the 243 Win chambering and my parts selection? If I am tuning the gas system with an adjustable gas block can I safely use a lighter AR15 buffer spring with the LR308 buffer without the buffer slamming rearward? Wouldn't that help reduce recoil even more while keeping the bolt that much cleaner from less gas use? Have fired these ARs/M16s for years but only started building them in the last year - Please enlighten me! Once I get this sorted out I plan to develop a handload using 95 grain SMK or TMK bullets for 800-1000 yard shooting. Greatly appreciate, Ty

Appreciate the welcomes and hopefully I'll be able to add to the conversation at least as much as I expect to take away in knowledge. Oh, and my service, the pleasure was truly all mine. Semper, Ty

Great site, glad you would take me. Shot rifle and pistol competitively in the Marine Corps way back in the 90's, participated in a few civilian tactical matches over the years, and enjoy varminting and range days. Shot mostly precision bolt action guns up until about 18 months ago when I decided to start collecting parts to build a LR308 for myself - well, actually two. Figured I'd start with a LR308 in .308 to complement my Remington 700 in .308 and then build another in .243 to go along with my Savage 112 Series J .243. Both are built using Aero Precision M5E uppers and lowers, Geissele SSA triggers, 12" M-Lok handguards, and Nikon P-308 30mm scopes. .308 has an 18" barrel and Magpul CTR stock (UBR 2.0 is on backorder) and the .243 sports a 24" X-Caliber barrel and compensator, SLR adjustable gas block, and a Magpul Gen 2 PSR stock. Hope to pick your collective brains as I get the .243 up and running these next few weekends. As you can tell from my username, my other hobbies include trucks and Jeeps - 4 wheeling. Got a collection of Jeeps, the first one, a '45 Ford GPW military that I dragged home in 1979 at the impressionable age of 13, to a rock crawling '73 CJ5, a built from spare parts CJ8 Scrambler, and a jacked up '00 Grand Cherokee on Ford Superduty axles. Also have a Dodge Ramcharger up on 1-tons that I bought new in '88 and an '04 Powerstroke Excursion. My driveway is FULL! I also play rugby with my Marine Corps Old Boys team when the wife allows me to go off to tournaments, and mountain bike. Ty Northern Virginia