Acer2428

I love my laser. I too resisted thinking it was too 'gamey'.... well, guess what, this IS a game. I use my laser FREQUENTLY. Examples from last weekend (outdoors, sunny): - Start next to port. 2 targets inside hip level port. On start I shimmied over, looked at targets w/ stock still on belt, 4 A's. Transition to shoulder on the way to next array. - Classifier 99-48: Start stock on belt, laser on, pointed at closest target. Buzzer *pop pop* from hip, then transition to shoulder AS I'm swinging to 2nd target. That said, I'm only (currently) a 'B' class shooter, so eh. I turn the laser on and whatever I pick up first, I go with. Green dot = laser, red dot = sight. It's highly visible. If you're a natural pointer (I come from a shotgun background) then you're generally going to be 'on paper' and not have to hunt for it.

I tried to run the Wolff +5% springs in mine since I stole the factory metalform spring to run in my 20+TF basepag mag as my main reload... No dice. The Wolff springs are more rectangular, corners are less round, and they hang up in the transition AND they don't stack as short (more coils) so I can only get 36 or so rounds in there (forget exact #). Went back to running factory springs in the 32+10 and put the wolff in a regular 32 I use for classifiers, practice, etc. Wasted money to figure out that didn't work, oh well.

Damn.... dats flat

Call JP, they'll take care of you.

It sure should, just like my KVP and FMP bolts do: https://www.brownells.com/rifle-parts/bolt-parts/extractor-parts/extractors/ar-15-m16-extractor-prod17524.aspx FWIW my OEM extractor was weak and I swapped it out for a BCM 556 extractor (like above) and it works like a champ. I would also recommend a spare roll pin (cheap insurance)

Nah, those blades will slice right through aluminum 100+ times before they get dull. I wouldn't use a forester, but it'll cut delrin like butter. Just be prepared for the bench to get covered in plastic shavings!

I'm in the same boat as OP and on top of that, only been shooting PCC division for a few weeks now. Appreciate all the tips and advice.

I went taccom ULW barrel and Vseven magnesium/ULW HG since I'm not a fan of the CF tubes. I have an MOE-SL stock and full weight BCG/receiver set. Plenty heavy in the rear to combat recoil, but light in the front for fast transitions. Really happy with it so far.

About 3 minutes with sandpaper did the trick for me. I cut it mine on a mitre saw, so not worried about squareness. Worked like a champ. Just kept sanding and test-fitting.

I haven't shot one, but if I were starting from scratch today, I'd go MPX or CMMG Guard. Guard checks most of your boxes but is going to have a softer recoil impulse. That said, I went from a bargain bin 9mm to an all-out build and have 0 regrets.... even if it's being finnicky. 16" bbl + regular buffer to 16" Taccom ULW barrel + Hydro buffer = night and day difference. That said, I still won HOA at my last shoot with the bargain-bin franken-AR. $50 Matrix rail, $60 Midway barrel, etc.

I haven't seen the video, but isn't this the opposite of what you'd want in a blowback system? Buffer weight and spring tension should keep the bolt closed longer, but MORE tension at the rear of the stroke seems like you're just setting up for a SLAM on closing and/or bolt bounce? I specifically went with the Tubb's 308 spring for this next build b/c it has MORE tension on the bolt closed and LESS when open. Not saying one is right or wrong, just curious.

I had a lower with an out-of-spec hammer pin location. Was forcing the hammer to ride too high. Hammer was putting too much pressure on the bottom of the BCG and slowed it enough to cause FTFeeds, but it's likely an ejector issue. Remember, you're no longer in 'mil-spec' country anymore if you've got a Franken-AR.

Division - PCC Rifle - Franken-AR Classification - U Time - 7.47 Points - 56 Hit Factor - 7.4967 B class run 2nd overall for the stage, 1st in PCC, 1st overall for the match (31 shooters). Setup was not ideal. One target leaned way back, all had been rained on and one looked a bit like an accordion. Oh well!

For a speed/close stage/hosing, etc. I like to run one click from fully collapsed. It shoulders faster/easier. But I find I get more dot bounce that way, so for stages with longer shots I run a little farther out and that allows me to 'pull' the gun in harder.

Interesting. I have a 24 3g (not the competition, but same thing w/ curved trigger). and have yet to have the issue. That said, I clean it out and re-lube the return rod/springs between every match. I also find it to have almost zero creep, but the reset does sometimes feel a bit 'slow' although it doesn't seem to effect my splits.

I can measure my spacer when I get home, but I too found there wasn't MUCH room to play with. I would guess my spacer is only 3/8" wide. That said, it was enough room that I bent a Seekins bolt-catch to the point where it locked up the entire gun before using the spacer. I do exactly the same. I face-sanded my spacer until I could JUST lock the bolt back manually, but it's not enough space to function during live-fire. So I can still lock-back manually for loading on stage start, but no risk of locking open, bending/breaking bolt catch, etc. It's the best of both worlds IMO. Would be easy to do with a normal spring/buffer setup too. I'd have to measure, but I assume a 3/4" OD delrin rod would do the trick.

I went half way. I have more than enough clearance for variances in bolt speed. The danger would actually be a HOTTER round that forces the bolt to cycle faster, thus allowing less time for the mag to pop a round up. My point was instead of buying a fancy pre-set system you can create your own, with customizable tolerances, for pretty darn cheap w/ a $4.86 delrin rod and a hand drill. I also enjoy being able to manually lock the bolt for loaded starts, clearing nasty jams, etc. I may try a longer spacer at some point. Seems like one could also do it with a normal buffer setup w/ a delrin rod with a small enough OD to fit within the buffer spring. I like the Armaspec. I originally bought it for suppressed use with my AR-9 pistol, but found it to be so much smoother than a normal buffer setup I swapped it over to my PCC when I built it. I also have JP SCS setups for my 556 AR's and they're great, but for the money, the Armaspec works just fine IMO.

Right, I just mean walking up to the line. Instead of fighting with the mag or downloading my big stick, I manually lock bolt to the rear, RO takes flag out, I insert mag and hit the bolt catch. g2g.

Also bumping for info? I was kicking around an MPX, but had a Guard BCG/barrel on order. Once I saw the new model I cancelled my order for the CMMG stuff. Would be nice to have an ETA on these!

I run an Armaspec unit and made my own delrin spacer a few months ago. 1" OD delrin is < $5 at Grainger. I drilled a 1/2" hole in the middle so the spring/rod can pass through. I have enough stroke that I can just barely manually engage the bolt catch, but not enough time for the catch to lock back on an empty mag. I use an open-bolt start for ease. I may try a longer spacer to further reduce travel, but this is a nice middle-ground for me.