308ar forum

Hey all. So, I'm not new to this forum, been coming here for over a decade, but I suppose there was a backend change at some point and lost my account. Anyway... I (maybe stupidly) jumped on Primary Arms' recent deal on stripped SR-762 lowers. Bought a pair of them for some builds I've had in mind. I'm no stranger to building large frame ARs, and thought it wouldn't be too difficult to find parts to finish the receivers and find matching uppers even with the rifles being out of production for several years. My hope was to find some Ruger or AR10A small parts to do some further test fitting to see what sticks... Numrich has a decent amount of Ruger small parts, but no takedown pins in stock. I reached out to Ruger but have not received a response yet. No dice on any Armalite small parts A or B series. Down to brass tacks... I'm looking for a source on these parts in order to finish the receivers and build a couple rifles: Small parts in general, but especially pivot and takedown pins, including springs - the takedown detent spring is longer on the Ruger since it is installed through the rear of the receiver. Bolt catch - as best I can tell an AR10A bolt catch should fit Upper receiver with DPMS threads - I've looked at the Centurion Mk11 and HTX Concepts SR25. Both look promising. I know the likelihood of them using the same pin size is next to nil. Thanks.

Forgot about em but 1,111 warning points i know @98Z5V has about a million of them. 😆

I visited my lgs and he had one more aero m5 upper hidden away that he let me purchase. I already built an upper just for steel targets so I thought maybe I could build this upper for hunting whitetails and the occasional coyote that gets in the way. Has anyone successfully used a large ar platform for hunting and if so, how is it set up? I was thinking 7mm-08 for the caliber with a 16”-18” lightweight barrel, but im open to any and all suggestions!

This is nuts. Obviously, I watch some HeavyDSparks stuff. Craziest recovery I've ever seen. Worth the minutes, I guarantee you.

Never forget

Think I need a bullet trap for my backyard to shoot suppressed!

This is a really good vid, and this guy always publishes great information. Well worth the time. It's the difference between military grade weapons and commercial grade weapons.

Hello everyone, I am finishing a Aero m5 build and just wanted to see if there would be any issues with the parts combination I chose. I would rather buy the correct parts now than have issues and rebuy new parts later on… I have read that the Armalite buffer setup is the best for this kind of platform but unfortunately could only find the buffer spring so I tried to recreate the rest of it with other parts. The rifle is a 6.5 Creedmoor build that will be reloaded for with H4350 and srp brass; Aero M5 upper and lower CMMG 308 LPK UTG pro 308 carbine buffer tube, internal length measure at 7-11/16 deep EA1095 buffer spring H3 buffer (was actually listed at 5.6oz but do not have on hand to measure) BA premium heavy barrel 20” length with rifle gas system Aero low pro gas block Aimsports 15” DPMS high handguard mlok I have not chosen a bcg yet, I would like others opinions before doing so. My only question is whether a 6.5 bolt is need and if the dual ejector setup will ruin brass. Thanks in advance for everyone’s advice.

Check it. See if you might have anything to do with it (affected by it)...

Hi everyone, new to the 308ar world. A bit of backstory on myself is that I bought a m5 lower right before covid and then life happened, years later going through the safe I found it in the original box and figured it was time to finish it. I start researching for parts and come to find out that Aero no longer makes parts or the company is shut down, so here I am thinking I have nothing more than a paperweight now. Luckily a friend turned me onto a local shop I never heard of but I give it a shot, low and behold he actually has a m5 upper hiding away somewhere in the shop and even though it's a different color than the lower, I am still ecstatic to at least have a matching receiver set. After getting that sorted, I set out to actually finish this build but had many questions as their is no milspec/standardization compared to the ar15. I happened across this site while researching and realized and their is a TON of knowledge here, with very helpful members so I joined. Hopefully after a few years of sticking around and learning I can start helping other members as well.

https://www.nytimes.com/2026/08/25/arts/music/dolly-parton-dead.html

Technology. Rules. Laws. Belt-Feds are legal. It won't be at Fall Shoot 2026. But it's gonna be at Fall Shoot 2027. Mark My Words... Info here: https://limasix.com/product-category/shop/belt-fed-uppers/ Brace yourselves.