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762AR: You just built my other Mega!!!! I think that is how I will do mine!!!! You, Sir, are an arteeest!!!
FINALLY got mine out today!!! ( See my thread for details: http://www.ar15.com/forums/t_3_121/646354_Tomorrow____FINALLY____It_SHALL_be_shot___.html ) |
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Quoted: Annnnnnd? How did it shoot? View Quote See Here: http://www.ar15.com/forums/t_3_121/646354_TODAY____FINALLY____It_SHALL_be_shot___.html Long story short: it behaved exactly as my research ( a big thank you to EVERYONE here ) lead me to believe it would. I am SOOOOOOOOOO glad I bought an adjustable gas block. By the end of the session ( 85 rounds ) it was locking on empty and feeding 100 percent at the 50 percent level( 10 rounds ) in all of the mags. As everything breaks in, I am gonna start cutting back the gas flow a bit. |
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anyone know where I can get a 5 round magazine for my MATEN that is of good quality and less than $50?
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Midway USA has DPMS and Midway's "AR Stoner" brand (C Products or ASC IIRC)
Quality of those two is meh but you aren't going to find a whole lot of quality options without blocking a PMAG yourself. http://www.predatormastersforums.com/forums/ubbthreads.php?ubb=showflat&Number=2250013 |
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Midway USA has DPMS and Midway's "AR Stoner" brand (C Products or ASC IIRC) Quality of those two is meh but you aren't going to find a whole lot of quality options without blocking a PMAG yourself. http://www.predatormastersforums.com/forums/ubbthreads.php?ubb=showflat&Number=2250013 View Quote thanks, I do have an AR Stoner 10 round mag, maybe I can try modifying that to make it 5. I don't want to mess up one of my good PMag |
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Don't worry about the gap between the rail and receiver, its supposed to be there. Some are just a little bigger than others. Good looking rifle. As for the trigger, I have had the 3lb and 4lb Timneys. Neither was as good as a Geissele SSA, SSA-E, or SD-E. I highly recommend those. View Quote Do you think the lower weight spring and hammer of the AR-15 will be an issue with the 308 MaTen? |
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Do you think the lower weight spring and hammer of the AR-15 will be an issue with the 308 MaTen? View Quote View All Quotes View All Quotes Quoted:
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Don't worry about the gap between the rail and receiver, its supposed to be there. Some are just a little bigger than others. Good looking rifle. As for the trigger, I have had the 3lb and 4lb Timneys. Neither was as good as a Geissele SSA, SSA-E, or SD-E. I highly recommend those. Do you think the lower weight spring and hammer of the AR-15 will be an issue with the 308 MaTen? Im not certain but I know some have had light strikes with some harder primers. I would guess the 3lb Timney would be a good candidate for that. |
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Quoted: I started my list for a 6.5 Creedmore build this fall. Am I wrong for wanting the non-monolithic upper? Rather, get the one with rail mounts built in instead. This one: http://megaarms.com/wp-content/gallery/maten_uppers_-mkm-maten-keymod-new/stck4860.jpg The monolithic upper is rock-solid of course, but you're married to it forever. I know the one pictured locks you in to Mega's handguards, but who knows what they might come up with in the future. What say you? View Quote Ya know, if it's mega...it's gonna rock the house. that being said.....the standard Mega upper allows you the flexibility of a plethora of handguards that are out there. I really like my Apex for instance...but there are so many stellar choices that I'd hate to limit myself to just what Mega may or may not offer. However, if you like the Mega offerings for handguards....by all means, go for it. |
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I started my list for a 6.5 Creedmore build this fall. Am I wrong for wanting the non-monolithic upper? Rather, get the one with rail mounts built in instead. This one: http://megaarms.com/wp-content/gallery/maten_uppers_-mkm-maten-keymod-new/stck4860.jpg The monolithic upper is rock-solid of course, but you're married to it forever. I know the one pictured locks you in to Mega's handguards, but who knows what they might come up with in the future. What say you? View Quote I have that set and I love it |
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Quoted: Be careful with that mine didn't head space correctly and I know several other peoples haven't View Quote View All Quotes View All Quotes Quoted: Quoted: Probably a 20" rainier match Be careful with that mine didn't head space correctly and I know several other peoples haven't |
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Be careful with that mine didn't head space correctly and I know several other peoples haven't View Quote View All Quotes View All Quotes Quoted:
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Probably a 20" rainier match Be careful with that mine didn't head space correctly and I know several other peoples haven't I know they are closer to a 7.62 chamber than .308. John Mcquay has a good build series where he checks headspace on one and explains why it appears to fail a .308 measurement. This is the vid, around the 15 min Mark I think.video |
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I know they are closer to a 7.62 chamber than .308. John Mcquay has a good build series where he checks headspace on one and explains why it appears to fail a .308 measurement. This is the vid, around the 15 min Mark I think.video View Quote View All Quotes View All Quotes Quoted:
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Probably a 20" rainier match Be careful with that mine didn't head space correctly and I know several other peoples haven't I know they are closer to a 7.62 chamber than .308. John Mcquay has a good build series where he checks headspace on one and explains why it appears to fail a .308 measurement. This is the vid, around the 15 min Mark I think.video Yup, great build series. That's where I learned a lot about the build with it being my first. I went with the Rainier Select 20" SS 1:11twist. The headspace checked out good for both 308 and 7.62x51. Had really good success shooting Remington box loads 168gr and 180gr through it so far. PMC, PPU and AE sub 150gr have not shot near as well I have all the stuff for reloading but have not taken the time to get started yet. |
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Yup, great build series. That's where I learned a lot about the build with it being my first. I went with the Rainier Select 20" SS 1:11twist. The headspace checked out good for both 308 and 7.62x51. Had really good success shooting Remington box loads 168gr and 180gr through it so far. PMC, PPU and AE sub 150gr have not shot near as well I have all the stuff for reloading but have not taken the time to get started yet. View Quote View All Quotes View All Quotes Quoted:
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Probably a 20" rainier match Be careful with that mine didn't head space correctly and I know several other peoples haven't I know they are closer to a 7.62 chamber than .308. John Mcquay has a good build series where he checks headspace on one and explains why it appears to fail a .308 measurement. This is the vid, around the 15 min Mark I think.video Yup, great build series. That's where I learned a lot about the build with it being my first. I went with the Rainier Select 20" SS 1:11twist. The headspace checked out good for both 308 and 7.62x51. Had really good success shooting Remington box loads 168gr and 180gr through it so far. PMC, PPU and AE sub 150gr have not shot near as well I have all the stuff for reloading but have not taken the time to get started yet. I have seen the video. From what I Understand the bolt should tun but mine didn't on go gauge |
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SOOOOOOOOOO. I read the first couple pages and I can't figure out what I'll need to install on this lower. I have a DPMS lower parts kit, and I think I need the 308 bolt catch? What about the bolt release on the other side? The lower's at my FFL and I want to place an order to get it here asap. Here's the exact lower I got from the EE. Thanks, Guys!
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SOOOOOOOOOO. I read the first couple pages and I can't figure out what I'll need to install on this lower. I have a DPMS lower parts kit, and I think I need the 308 bolt catch? What about the bolt release on the other side? The lower's at my FFL and I want to place an order to get it here asap. Here's the exact lower I got from the EE. Thanks, Guys! http://i.imgur.com/n4VquAn.jpg Link View Quote All .308 specific parts are already installed. You only need a standard AR-15 LPK (actually less) to complete. |
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Isn't the mag release on the "AR10/308" parts kit a little longer than the AR15 parts kit. I used the CMMG 308 LPK, any other brand will work as well.
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Quoted: Isn't the mag release on the "AR10/308" parts kit a little longer than the AR15 parts kit. I used the CMMG 308 LPK, any other brand will work as well. View Quote I also used the CMMG .308 LPK sans trigger/hammer which are Geissele on my build. Everything works fantastically. You can buy the CMMG kit that comes without a hammer and trigger group if you want to use something else. |
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I also used the CMMG .308 LPK sans trigger/hammer which are Geissele on my build. Everything works fantastically. You can buy the CMMG kit that comes without a hammer and trigger group if you want to sue something else. View Quote View All Quotes View All Quotes Quoted:
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Isn't the mag release on the "AR10/308" parts kit a little longer than the AR15 parts kit. I used the CMMG 308 LPK, any other brand will work as well. I also used the CMMG .308 LPK sans trigger/hammer which are Geissele on my build. Everything works fantastically. You can buy the CMMG kit that comes without a hammer and trigger group if you want to sue something else. But a regular at kit should work, right? |
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But a regular at kit should work, right? View Quote View All Quotes View All Quotes Quoted:
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Isn't the mag release on the "AR10/308" parts kit a little longer than the AR15 parts kit. I used the CMMG 308 LPK, any other brand will work as well. I also used the CMMG .308 LPK sans trigger/hammer which are Geissele on my build. Everything works fantastically. You can buy the CMMG kit that comes without a hammer and trigger group if you want to sue something else. But a regular at kit should work, right? yes ETA: For reference I have built 3 MATENs with nothing but AR-15 LPKs |
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Quoted: But a regular at kit should work, right? View Quote View All Quotes View All Quotes Quoted: Quoted: Quoted: Isn't the mag release on the "AR10/308" parts kit a little longer than the AR15 parts kit. I used the CMMG 308 LPK, any other brand will work as well. I also used the CMMG .308 LPK sans trigger/hammer which are Geissele on my build. Everything works fantastically. You can buy the CMMG kit that comes without a hammer and trigger group if you want to sue something else. But a regular at kit should work, right? |
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For a long range maten what's the best .308 barrel length. Bartlein offers upto 26". Gonna be made by GAP
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For a long range maten what's the best .308 barrel length. Bartlein offers upto 26". Gonna be made by GAP View Quote Velocity difference for .308 between 26" and 18" is only 100-150 fps (175gr FGMM difference is only 75 fps for reference). So in my personal opinion it is added weight for no real advantage. I would personally recommend 18" but 20" would be a fine choice as well. Just one man's opinion though. |
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Velocity difference for .308 between 26" and 18" is only 100-150 fps (175gr FGMM difference is only 75 fps for reference). So in my personal opinion it is added weight for no real advantage. I would personally recommend 18" but 20" would be a fine choice as well. Just one man's opinion though. View Quote View All Quotes View All Quotes Quoted:
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For a long range maten what's the best .308 barrel length. Bartlein offers upto 26". Gonna be made by GAP Velocity difference for .308 between 26" and 18" is only 100-150 fps (175gr FGMM difference is only 75 fps for reference). So in my personal opinion it is added weight for no real advantage. I would personally recommend 18" but 20" would be a fine choice as well. Just one man's opinion though. Average velocity loss per inch with a .308 is +/- 25fps. So, average loss going from 26-18" would be closer to 200fps. Velocity not only depends on barrel length and powder used but tightness of the bore plays a big role and can vary from barrel to barrel. For a long range .308 bench rifle, 26" would be the best length as it will give the best velocity. For something you plan on carrying or hunting, 18"-22" would be a good compromise. I have a 20" and don't find it to be too long and have shot out to 1000 yards with no problem. |
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26" is way too long for an AR. The powder is done burning at 21" IIRC, also with the AR, you tap the barrel for gas, so you lose significant amount of power past your gas block. So having a standard rifle length system, you have somewhere around an extra 14" or so the bullet travels with a loss of oomph behind it.
BUT, that longer barrel does make your bullets fly a little straighter and more stable. So you get better precision out of a longer barrel. But if you want to be surgically precise, might as well get a bolt gun. IMO, anything longer than 22" on an AR is a waste of space and weight. At 22", you get almost max velocity, and still plenty of barrel to stabilize your bullets and give you plenty of consistency. |
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Even if the powder burnt up at 21" (this can vary with different powder), you are still getting pressure pushing the bullet faster. You actually loose very little velocity due to the gas port on an AR. My 20" gas .308 shoots faster than my 20" bolt .308.
Barrel length has little to do with mechanical accuracy or stability. Twist and velocity determine the stability. |
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That's impressive about your AR. I was under the impression twist plus barrel length helped stabilize bullets better.
Say, a 12" barrel will not stabilize a bullet as well as a 20" barrel, given the twist is 1:10. Sure, the bullet, quality of rifling in the barrel, powder, etc all play factors. But if everything was the same excerpt length, you will get better consistency out of the 20" barrel, correct? Not saying your wrong, just trying to learn something different. I personally wouldn't have anything over 24", and that's in a bolt gun. Rifles become very awkward to handle at that point for me. |
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Good news. I just successfully disassembled my dpms .308 rifle buffer apart and filled it with 4oz of tungsten powder. I took the buffer apart by punching out the roll pin and trashing the weights inside but I kept the rubber spacers. I then filled the buffer with powder and set the 6 rubber spacers on top to pack the tungsten a little. Then I put silicon on the rubber cap and closed her up and drove the roll pin in. The tungsten has a little room to shake and will act like a dead blow hammer when the bolt is returned. The tungsten can be purchased at golf smith for $25 per 4oz
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That's impressive about your AR. I was under the impression twist plus barrel length helped stabilize bullets better. Say, a 12" barrel will not stabilize a bullet as well as a 20" barrel, given the twist is 1:10. Sure, the bullet, quality of rifling in the barrel, powder, etc all play factors. But if everything was the same excerpt length, you will get better consistency out of the 20" barrel, correct? Not saying your wrong, just trying to learn something different. I personally wouldn't have anything over 24", and that's in a bolt gun. Rifles become very awkward to handle at that point for me. View Quote Not necessarily. Once a bullet is in the rifling, its spinning as fast as it is going to go. Unles you have a gain tiwst barrel, barrel length does not speed up stability. |
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Ok guys lets be honest here 20" .308 barrel is all fine and dandy does the job. sure 26" will give better shot placement at 1000yd but if you are trying to use a .308 for a consistent 1000yd gun there is other issues.
I love the .308 round to death but lets face facts the average shots you will be taking will be well within 1000 yards. as for the only loss of 75fps loss between 26" and 18" Id love to see what kind of FGGM's you are shooting. between a 20"and 18" this number is correct. If you are looking for a good package while saving weight go 18" it will give you the best weight saving with out loosing the stability that a longer barrel creates but this is at great distance and your average shooter will not even notice. you will notice a longer barrel shoots a little bit nicer in the wind but all things being equal you are more likely to suffer user error than a barrel being 2" too shoot. |
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except for the fact that its starting to travel faster and faster.... its not making any more rotations per foot but it does that foot at a greater speed thus when the bullet comes out it is spinning at a faster rate.
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Quoted: Good news. I just successfully disassembled my dpms .308 rifle buffer apart and filled it with 4oz of tungsten powder. I took the buffer apart by punching out the roll pin and trashing the weights inside but I kept the rubber spacers. I then filled the buffer with powder and set the 6 rubber spacers on top to pack the tungsten a little. Then I put silicon on the rubber cap and closed her up and drove the roll pin in. The tungsten has a little room to shake and will act like a dead blow hammer when the bolt is returned. The tungsten can be purchased at golf smith for $25 per 4oz View Quote |
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I am anxious to hear how that runs!!!! View Quote View All Quotes View All Quotes Quoted:
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Good news. I just successfully disassembled my dpms .308 rifle buffer apart and filled it with 4oz of tungsten powder. I took the buffer apart by punching out the roll pin and trashing the weights inside but I kept the rubber spacers. I then filled the buffer with powder and set the 6 rubber spacers on top to pack the tungsten a little. Then I put silicon on the rubber cap and closed her up and drove the roll pin in. The tungsten has a little room to shake and will act like a dead blow hammer when the bolt is returned. The tungsten can be purchased at golf smith for $25 per 4oz Shooting my ar15 with a spikes ST-T2 is like night and day difference with my friends and his H3 buffer. I'll agree with HK Pirate, that is why I choose the 18"barrel. It's the best compromise. |
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Ok guys lets be honest here 20" .308 barrel is all fine and dandy does the job. sure 26" will give better shot placement at 1000yd but if you are trying to use a .308 for a consistent 1000yd gun there is other issues. I love the .308 round to death but lets face facts the average shots you will be taking will be well within 1000 yards. as for the only loss of 75fps loss between 26" and 18" Id love to see what kind of FGGM's you are shooting. between a 20"and 18" this number is correct. If you are looking for a good package while saving weight go 18" it will give you the best weight saving with out loosing the stability that a longer barrel creates but this is at great distance and your average shooter will not even notice. you will notice a longer barrel shoots a little bit nicer in the wind but all things being equal you are more likely to suffer user error than a barrel being 2" too shoot. View Quote Here is a good read for you and you may want to look at the charts and data below the article. http://www.thetruthaboutguns.com/2013/10/daniel-zimmerman/the-truth-about-barrel-length-muzzle-velocity-and-accuracy/ |
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except for the fact that its starting to travel faster and faster.... its not making any more rotations per foot but it does that foot at a greater speed thus when the bullet comes out it is spinning at a faster rate. View Quote It's spinning at the same rate, just moving slower. |
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except for the fact that its starting to travel faster and faster.... its not making any more rotations per foot but it does that foot at a greater speed thus when the bullet comes out it is spinning at a faster rate. View Quote 1 turn in 7 inches is the same if you're going 3 mph or 4000 mph. you're still spinning one full rotation every 7 inches you travel. |
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A bullet with a 2700 MV out of a 1-11 barrel will be spinning faster once it leaves the gun than a 2400mv out of same barrel. hence me stating its not going to make more of a rotation per foot of barrel but added MV of longer barrel will spin bullet at a faster speed. just like Rpm its still making the same twist but its making it faster due to higher speed. The buller till makes one turn per foot but its making the turn faster
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You understand it correctly, you just aren't explaining it correctly.
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Well its taken some time but finally my Mega Maten is finished.
Build included Mega Matched set Larue apeg grip geissele super dynamic enhanced trigger Magpul prs stock JP 15" hand guard CMMG bolt carrier Enhanced bolt matched to barrel SLR rifle works sentry 7 adj gas block 20" Lila barrel chambered in .308 11T Its a cookie cutter maten build but its hard not to love this rifle. Oh and sitting on top is a nightforce ATACR http://i1223.photobucket.com/albums/dd501/golfpro64/fd06506d-a2e6-4ca1-bdf9-9ef75aff7d9c.jpg |
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Quoted: Well its taken some time but finally my Mega Maten is finished. Build included Mega Matched set Larue apeg grip geissele super dynamic enhanced trigger Magpul prs stock JP 15" hand guard CMMG bolt carrier Enhanced bolt matched to barrel SLR rifle works sentry 7 adj gas block 20" Lila barrel chambered in .308 11T Its a cookie cutter maten build but its hard not to love this rifle. Oh and sitting on top is a nightforce ATACR http://i1223.photobucket.com/albums/dd501/golfpro64/fd06506d-a2e6-4ca1-bdf9-9ef75aff7d9c.jpg View Quote BEAUTIFUL!!!!! |
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What optic should you guys recommend, I want a scope with around 20 power on top, mil/ mil, first focal plane, preferable made in USA and I am willing to spend around $1500 but that could change if necessary
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im heavily leaning towards a MK6 3-18x44 View Quote View All Quotes View All Quotes Quoted:
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What optic should you guys recommend, I want a scope with around 20 power on top, mil/ mil, first focal plane, preferable made in USA and I am willing to spend around $1500 but that could change if necessary im heavily leaning towards a MK6 3-18x44 Ya that's about double my price range. |
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Ya that's about double my price range. View Quote View All Quotes View All Quotes Quoted:
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What optic should you guys recommend, I want a scope with around 20 power on top, mil/ mil, first focal plane, preferable made in USA and I am willing to spend around $1500 but that could change if necessary im heavily leaning towards a MK6 3-18x44 Ya that's about double my price range. No, you can pick them up in the 1,800-1,900 range with the TMR or mildot reticle. They are a nice little package. Another option to consider is the Bushnell ERS 3.5-21X50. They are awesome scopes for the money. |
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