Smoke Eater 0 Posted March 22, 2014 Well first issue is my barrel discolored... almost to a white. Other issue is the recoil is not what it used to be. Granted she only has 350 rounds down the tube.. but my shoulder was actually bruused up after shooting 100 rounds. Tried contacting psa since it is there rifle build kit but a week of no answers and many calls and emails leaves me to ask you guys. Ar is a psa mid length chf build kit with a battle comp and a spike tactical lower. Pics when i get a chance Quote Share this post Link to post Share on other sites
Vlad G 345 Posted March 22, 2014 Check you gas block and gas tube. I'm betting the white is gas and powder residue leaking from your gas block or gas tube. What ammo are you using. Quote Share this post Link to post Share on other sites
checko 180 Posted March 22, 2014 This is a 5.56 rifle? I've shot several hundred rounds at a time and never had a concern with recoil let alone bruising. Is it the whole barrel or just by the muzzle? Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 22, 2014 I have to pop the handguards off but as of right now just infront of my gas block/a2 site. Quote Share this post Link to post Share on other sites
MidwestPX 172 Posted March 22, 2014 Pic of the discoloration? I'm with Vlad on this and thinking it's powder/residue. Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 22, 2014 I wiped it down with hoppes and gave it a good coat of oil... still mis colored. When i get home ill have to get a pic. Sitting at a nephews play at the moment. Im wondering if the gas tube maybe clogged... causing the increased recoil. Its my first build so im clueless Quote Share this post Link to post Share on other sites
Vlad G 345 Posted March 22, 2014 Guessing it is still gases escaping, they will stain/discolor/wear the finish off the barrel. Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 22, 2014 Ok. So ill pop off the gas block and pop.out the role pin to remove the gas tube and re install. Its just odd that the first 200 rounds had no recoil and now it like shooting a 20g. I dont wanna have to pop my comp off to send it back to psa either (if they ever get back to me) so ill try that for now Quote Share this post Link to post Share on other sites
MidwestPX 172 Posted March 22, 2014 Does it look like this? Barrel on the left was fired twice however the bolt wouldn't unlock due to the extension being out of spec. Barrel on the right is brand new. Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 22, 2014 Same color but the entire exposed area of the barrel is that way... Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 22, 2014 What does the bolt have to do.with it? Quote Share this post Link to post Share on other sites
MidwestPX 172 Posted March 22, 2014 What does the bolt have to do.with it? I only mentioned it because of the excessive buildup after only two rounds. Because the bolt didn't unlock, more gas than normal exited between the block and barrel. Is your gas block pinned on or a set screw? I'm wondering if the ID of the gas block isn't a little oversized and more gas than normal is escaping but not enough to cause cycling issues. Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 22, 2014 Its held in by 2 pins by the removed bayo lug. That would cause a heavy recoil cycle to also right? Quote Share this post Link to post Share on other sites
MidwestPX 172 Posted March 22, 2014 Its held in by 2 pins by the removed bayo lug. That would cause a heavy recoil cycle to also right? Not necessarily. I'd take a look at the surface of your buffer to see if hasn't been battered or otherwise physically damaged while cycling. Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 22, 2014 Ok. So ill check and make sure the gas hole and thegas block line up the best i can... re assemble and ifnl its not fixed ill.harrass psa until they respind Quote Share this post Link to post Share on other sites
Vlad G 345 Posted March 22, 2014 Also check that the gas block was installed straight. Years ago I bought a barreled upper where the front site was mounted about 5-7 degrees off. That was pretty much a send it home and try again, because the drilled taper pins were off-center. Check your gas tube for blockages, bents, damage at the bolt end. Is your action functioning properly when hand operating it? No binding, no excessive friction? I'm wondering if the issues is in the gas system or in the bolt/bolt carrier/recoil area. If your bolt refuses to move for whatever reason (like excess pressure) your gas has to go somewhere. Also what ammo are you using? might the ammo be overpressure? Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 22, 2014 Federal xm193. Ill try what you said. I doubt the fsb is off center ... at she didnt need much adjustment to site her in Quote Share this post Link to post Share on other sites
raz-0 1,256 Posted March 22, 2014 Well I'll suggest what gave me shoulder bruising with my ar. It was being over aggressive with shouldering it. Unless you have some kind of illness that makes you bruise incredibly easy, .223 out of a >6lb rifle won't be bruising you. Quote Share this post Link to post Share on other sites
intercooler 41 Posted March 22, 2014 were they reloads? Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 23, 2014 No factory loads i purchased threw psa Quote Share this post Link to post Share on other sites
Displaced Texan 11,653 Posted March 23, 2014 Any updates to this? Quote Share this post Link to post Share on other sites
Lalo 13 Posted March 23, 2014 In for pics of the discoloration and face of buffer. Did you put the upper together yourself or did you buy it complete? What kind/weight buffer are you using? Check the buffer spring for anything abnormal and measure its length. Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 24, 2014 I figured out the discoloration... well i removed it...cant figure out how to post pics. It wasnt from the gas block i removed the gas block and it was clean under neath and started about 1/2" past it. . as for the heavy recoil the nylon part of my buffer was off.. and no role pin insite for it.. so.it was binding the spring. I ordered a new spikes buffer and i will retest and see whats happening. Hopefully it fixes it. Quote Share this post Link to post Share on other sites
jon.squared 0 Posted March 24, 2014 I figured out the discoloration... well i removed it...cant figure out how to post pics. It wasnt from the gas block i removed the gas block and it was clean under neath and started about 1/2" past it. . as for the heavy recoil the nylon part of my buffer was off.. and no role pin insite for it.. so.it was binding the spring. I ordered a new spikes buffer and i will retest and see whats happening. Hopefully it fixes it. If you have a google account, you can just upload it to Google Drive and allow anyone with the link to view it... then copy+paste the link here to JUST your photo. Or click the More Options link where you are going to post a reply and select [bROWSE] under ATTACH FILES, navigate to your photo, click on ATTACH FILE and then ADD REPLY. Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 24, 2014 Here is the before pic tomorrow ill do my best to do an after Quote Share this post Link to post Share on other sites
Golf battery 1,223 Posted March 24, 2014 It looks freezer burnt. Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 24, 2014 Yea. Wondering why. But clp fixed it Quote Share this post Link to post Share on other sites
Lalo 13 Posted March 26, 2014 Did you use some type of chemical to clean the barrel before you shot it? Maybe enough of it was left on it when you fired it and when the barrel got hot it turned that way. Weird.... Quote Share this post Link to post Share on other sites
Smoke Eater 0 Posted March 26, 2014 Maybe some hoppes only cleaning solvent i use Quote Share this post Link to post Share on other sites
Vlad G 345 Posted March 26, 2014 I still think that is gases being shot from the gas block. Have you disassembled the gun and checked for obstructions yet? Quote Share this post Link to post Share on other sites