Socaliblaster

It'd be cool if the firing stopped when you released the trigger.... ;D Both oligarch and tyrant mistrust the people, and therefore deprive them of their arms. Aristotle

Welcome, me too. <thumbsup> Let's work to overturn the stupid freaking CA laws! ---------------------------------------------------------------------------- Both oligarch and tyrant mistrust the people, and therefore deprive them of their arms. Aristotle

Here's my experience with my two LR-308's, both custom home builds using 80% Tactical Machining lowers and DPMS complete upper assemblies (pictures coming soon): DPMS mags: both rifles cannot make it 5 rounds without jamming. PMAG mags: both rifles feed and extract beautifully. So, I think the DPMS rifles are absolutely excellent. Just make sure that you don't run the magazines that were designed by the guys who designed the rifles. :)

Hey, this is Don from southern cal. I’m still aiming to put pictures up of the two LR-308’s that I’ve built during the last couple months, coming soon. They’re awesome. In my introductions post (still there, “Another new guy building a 308”), I attached some marked-up drawings for machining the 308 lower from an 80% lower. These are mark ups of ‘the only thing I found out there’. (I do have a full set of validated AR15 prints.) There are two dimensions on the second page that I crossed out from the original sketch, indicating that they were not correct. I’m not sure about that now. The source of confusion is the mag catch hole horizontal location relative to the center of the bolt catch slot. If you use the dimensions of the original sketch, it says that the mag catch hole is .036” further towards the mag well than is the bolt catch slot. However, if you look how the sketch is drawn, and if I look at both my actual lowers (these features already machined into the 80% lower), it sure looks like those holes are either aligned vertically or pretty close to that. To add to the confusion, if you look at the dimensions of the Colt AR15 lower, you’ll see that for the AR15 the mag catch hole is .0045” further away from the mag well than is the bolt catch slot. (It’s too late to yell at the designer for that, but I really can see no engineering reason not to have aligned them instead of offsetting them RCH.) Technically, these dimensions don’t matter to me, as the way I do it is to set my zero at the center of the bolt catch slot. Everything you need to machine between the bolt catch slot and the buttstock is the same between the AR15 and the 308 (you don’t need to machine in the takedown pin hole in the 80%), except one depth which is annotated on the sketch. So, although I doubt anybody would use those two dimensions (unless you’re hogging one out from a pure slab of aluminum), I wanted to clear up the fact that I am clueless about those two dimensions. All the other dimensions that I put on there are good; validated thru machining two of them that passed functional fine and both shoot great (with Pmags of course, but that’s a different subject). Does anybody know anything more about those relative hole locations? I have a hard time believing the sketch when I look at my lowers, but ???

Hey, first post here. I got an 80% 308 lower from Tactical Machining. It was a beautiful part as received. Only one slight issue: the hole for the bolt catch roll pin was not drilled quite deep enough into the magazine side of the slot, and the little setscrew couldn’t engage the threads. However, since the pin engagement was way more than necessary, I just ground the .5” pin to .4” and popped it in there. There’s still more than enough engagement, works great. I machined, light grit blasted and anodized it, which turned out real nice. It passed all functional testing with a DPMS 308LPK installed with no issues. I’ll post pictures of it later because unfortunately my camera just took a dump on me. By the time the new camera gets here that I just ordered, I’ll have my nice new upper on it. I used a combination of a Colt AR15 drawing and a hand drawing of a 308 that’s on the net. The hand drawing was very helpful. I added some dimensions and made some notes on it while machining that I’m going to use for my next one and may come in handy for anybody else (attached). I hope somebody finds this helpful. 831_.pdf