Clay_FortWorth Posted June 7, 2014 Report Share Posted June 7, 2014 Hey Guys, New to the forum. Buddy and I are building our first AR308. Still building it and have not fired it yet. We ordered a TM10 lower and a CMMG LPK. Installed the bolt catch and it didn't feel right. Pin was stuck so based in internet research grinding it out with a dremmel seemed like the best course of action. Got the pin out and replaced the bolt catch with a DPMS bolt catch. Just operating it without the upper feels way way better and correct. ***PROBLEM: reassembled the rifle I am have trouble locking the bolt the rear. It seems like it is not engaging enough and when It does I have to work at it to lock back. Has anyone run in to this problem? I inserted a mag and the bolt will lock back, but if i remove the mag it sends the bolt home into battery...... Too sensitive for me. I am still waiting for our bolt to come in from Shadow Ops weaponry so I have been using a bolt out of another buddies DPMS Sportical. Maybe this could be the issue? TM10 Lower DPMS LR308 upper DPMS 18" SASS barrel Fortis Switch 14" Magpul PRS ALG ACT trigger Shadow Ops Weaponry Bolt A2 rifle buffer from Brownells AAC muzzle brake Added a photo below of the rifle assembled so far Thanks guys! Clay Quote Link to comment Share on other sites More sharing options...
shibiwan Posted June 8, 2014 Report Share Posted June 8, 2014 Take a pic of the bolt catch area and lets have a look. CMMG had installed the wrong bolt catch in my rifle... they did make it right by sending me the right one. This was the wrong bolt catch in my rifle. Quote Link to comment Share on other sites More sharing options...
edgecrusher Posted June 8, 2014 Report Share Posted June 8, 2014 Well, we've done all the comparisons, and Armalite makes the best bolt catch. I'm not talking brand favoritism or any of that kind of nonsense, but there is a thread here with pics that clearly shows their piece is beefier where it contacts the bolt face. It can be used in a DPMS pattern lower as well Quote Link to comment Share on other sites More sharing options...
washguy Posted June 8, 2014 Report Share Posted June 8, 2014 Hi Clay im not clear on exactly what you dremeled out? :) Wash Quote Link to comment Share on other sites More sharing options...
Clay_FortWorth Posted June 8, 2014 Author Report Share Posted June 8, 2014 (edited) Here you go Shibiwan: (took me a while to figure out how to upload the pics) Edgecrusher: I will check those out as a replacement if it is indeed the bolt catch needing to be beefed up. Washguy: Supposedly it would just slide out but it was stuck so I grinded out a hole to work the pin out with a small slot screwdriver. Edited June 8, 2014 by Clay_FortWorth Quote Link to comment Share on other sites More sharing options...
Clay_FortWorth Posted June 8, 2014 Author Report Share Posted June 8, 2014 took me a while to figure out how to upload the pics Quote Link to comment Share on other sites More sharing options...
DNP Posted June 8, 2014 Report Share Posted June 8, 2014 I thought TM used a screw on their Bolt Catch...did that change? There was a thread talking about issues caused by over tightening it. Do you have the right spring installed with it? That one is easy to mix up some times. Quote Link to comment Share on other sites More sharing options...
Clay_FortWorth Posted June 8, 2014 Author Report Share Posted June 8, 2014 I thought TM used a screw on their Bolt Catch...did that change? There was a thread talking about issues caused by over tightening it. Do you have the right spring installed with it? That one is easy to mix up some times. Hey DNP, Yes, they have a pin (not roll pin) that you insert and then they provided a small allen screw to tighten down. I ordered a DPMS spring and detent separate from the CMMG parts kit just to be sure. Quote Link to comment Share on other sites More sharing options...
DNP Posted June 8, 2014 Report Share Posted June 8, 2014 Well damn...what the hell did you break!? :) Quote Link to comment Share on other sites More sharing options...
98Z5V Posted June 8, 2014 Report Share Posted June 8, 2014 A2 rifle buffer from Brownells That's your issue. Well, first issue. No AR-15 parts in a 308 AR recoil system. None. No buffers, no buffer springs. Start there. Everybody else that replied - how the fuk did you guys miss that one? :bat: :bitchslap: Quote Link to comment Share on other sites More sharing options...
Clay_FortWorth Posted June 8, 2014 Author Report Share Posted June 8, 2014 That's your issue. Well, first issue. No AR-15 parts in a 308 AR recoil system. None. No buffers, no buffer springs. Start there. Everybody else that replied - how the fuk did you guys miss that one? :bat: :bitchslap: Any recomendations on Buffer and Buffer spring for .308? Quote Link to comment Share on other sites More sharing options...
Clay_FortWorth Posted June 8, 2014 Author Report Share Posted June 8, 2014 Well damn...what the hell did you break!? :) Lol.... I wish I knew brother. Quote Link to comment Share on other sites More sharing options...
unforgiven Posted June 8, 2014 Report Share Posted June 8, 2014 Any recomendations on Buffer and Buffer spring for .308? http://heavybuffers.com/ They are a sponsor here and alot of the guys use them,and like the product. Quote Link to comment Share on other sites More sharing options...
survivalshop Posted June 8, 2014 Report Share Posted June 8, 2014 (edited) First off , the pin is hardened steel , if I remember correctly & if you over tighten the set screw or securing set screw , it will force the pin into the far side of the receiver . I would install the pin & use a removable loc-tite, like the Purple or a very ,very small amount of the Blue & lightly set the set screw . Making sure the pin is supported on both ends in the receiver . As said by 98, make sure you use all 308AR receiver extension components. Make sure you don't have a AR 15 bolt catch , you need an 308AR bolt catch , below show the difference. Yours looks like the right one. Also make sure there is easy freedom of movement with the catch & its not hanging up. I have also had to make adjustments to the the Bolt catch to let it rise farther to engage the bolt . Edited June 8, 2014 by survivalshop Quote Link to comment Share on other sites More sharing options...
Masgtions99 Posted June 8, 2014 Report Share Posted June 8, 2014 (edited) Just a note, I have solved many a 308 bolt catch problems with using the AR 10 type of bolt catch. The newer style is part number, Armilite 10203100 you will have to notch the bottom in order for it to sit flat to the lower receiver and not stick up but it will raise up higher than the DPMS style and provide more bolt catch surface and so far has solved magazine problems of not hitting the catch and the catch just barely grabbing the bolts! Yes, NO AR 15 bolt catchs for the 308!! Edited June 8, 2014 by Masgtions99 Quote Link to comment Share on other sites More sharing options...
Clay_FortWorth Posted June 8, 2014 Author Report Share Posted June 8, 2014 @Survialshop It feels like it is moving correct, where as the CMMG was not. What did you do to modify the bolt catch to rise higher? Also, something wierd is when I do lock the bolt to the rear and remove the magazine it sends the bolt into battery. @Masgtions99 I will order one this morning! Quote Link to comment Share on other sites More sharing options...
Clay_FortWorth Posted June 8, 2014 Author Report Share Posted June 8, 2014 So here is what Im thinking: Purchase Armalite bolt catch JP enterprises 308 buffer spring - (I have a David Tubb flat wound in my AR15, any thoughts on Tubbs spring vs. JP?) I live down the road from DSG arms and they sell the AR10 Armalite buffer would this be a comparable buffer to the DPMS? (Quick delivery from DSG) My buddy is not ready to drop the scratch for one from Heavybuffers.com.... but will in the future. From what i have read is that our A2 buffer tube will work but defintley need to change the spring and buffer. Can anyone confirm this? Quote Link to comment Share on other sites More sharing options...
DNP Posted June 8, 2014 Report Share Posted June 8, 2014 I think from what 98 pointed out, the buffer is your issue. It's too long and doesn't allow the carrier to move far enough to the rear. When it locks back, does it look like the picture Survival shop posted up? Check out this page and read a couple of the customer reviews. http://www.midwayusa.com/product/913498/dpms-buffer-dpms-lr-308-rifle Quote Link to comment Share on other sites More sharing options...
DNP Posted June 8, 2014 Report Share Posted June 8, 2014 Sounds like you have it figured out Quote Link to comment Share on other sites More sharing options...
edgecrusher Posted June 8, 2014 Report Share Posted June 8, 2014 Clay, that is a good plan of action. Start there and you should be all set. Tom, my bad, I read the first post too quickly and missed the buffer listed. But your silverback gorilla ass has to get here to punish me quick.... As the next time I get out to you I'll be back up to a high speed dangerous ninja. Quote Link to comment Share on other sites More sharing options...
Clay_FortWorth Posted June 8, 2014 Author Report Share Posted June 8, 2014 Thanks guys! DPMS buffer says 5.25 inches long Armalite buffer says 5 3/16 inches long Any thoughts on the differences? Quote Link to comment Share on other sites More sharing options...
gnatshooter Posted June 8, 2014 Report Share Posted June 8, 2014 Would buffer work? The price is right. Quote Link to comment Share on other sites More sharing options...
shibiwan Posted June 8, 2014 Report Share Posted June 8, 2014 Thanks guys! DPMS buffer says 5.25 inches long Armalite buffer says 5 3/16 inches long Any thoughts on the differences? If it's a standard "A2" buffer tube, use the DPMS style LR0308 buffer. http://www.midwayusa.com/product/913498/dpms-buffer-lr-308-rifle Armalite AR-10 buffer tubes are longer than standard "A2" buffer tubes and use the longer length "standard" AR15 rifle buffer. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted June 8, 2014 Report Share Posted June 8, 2014 Armalite AR-10 buffer tubes are longer than standard "A2" buffer tubes and use the longer length "standard" AR15 rifle buffer. I don't believe that is the case. It's true for carbine receiver extensions, but not for rifle receiver extensions. There's really only ONE length for rifle receiver extensions, and it's "A1 length." The only thing that makes "A2" is the A1 receiver extension, with a 5/8" spacer for the end, and a vented screw that 5/8" longer than the A1 vented screw. Armalite carbine receiver extensions use AR-15 carbine buffer - that's why their extensions are longer, in order to make use of the AR-15 part. The use the H3 Carbine Buffer in the AR-10 rifles with collapsible stocks. Quote Link to comment Share on other sites More sharing options...
shibiwan Posted June 8, 2014 Report Share Posted June 8, 2014 (edited) Yes, I know the part about the A1/A2 tube (same tube, just with a spacer) but not aware of what Armalite is doing. I stand corrected. :) Even better, OP; get a heavy buffer. Edited June 8, 2014 by shibiwan Quote Link to comment Share on other sites More sharing options...
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