mrraley

I know... here he goes again... another friggin ray of sunshine. :blink: Are you looking for a dedicated upper? OR, Are you just looking for a conversion kit?

unfortunately they do still teach that. That is why I stress it so much on what not to do when I was teaching armorer courses.

Something I just noticed and I haven't seen it brought up yet... OP say he's building a .308 rifle... BUT the pictures of a 5.56 BCG and barrel. I'm not sure if they are what's being worked on or just for practical demonstration... Could be the problem....

So ... why don't ya tell us how you really feel. <munch>

Now that we've got that out of the way... One of the key points that I used to teach in my class about the forward assist is this... It is an "EVIL" >:D button. But to think of it as a Clint Eastwood movie... the good, the bad, and the ugly. If for some odd reason that you would have to use the forward assist for anything, stop for a second and think about it. Ask yourself "why am I using the forward assist?" THE GOOD - In a tactical situation, and you need to at least be as quiet as possible, but right before your raid or kicking in that door, you want to do a press check on your rifle to ensure it is chambered. So instead of pulling the charging handle back and just letting it go slamming the bolt home. You use the forward assist along with holding the charging handle and quietly push the bolt back forward. THE BAD - In a shooting situation, while you're banging the hell out of that trigger with your figure, and all of a sudden everything just stops. Quick, ... mag change. Hit the bolt release and drive on. ... OH poop... the round didn't chamber. :o Hit the forward assist get the round to chamber... continue shooting. THE UGLY - In a shooting situation, while you're banging the hell out of that trigger again, with your figure, and all of a sudden everything just stops. Quick, ... mag change. Hit the bolt release and drive on. ... OH poop... the round didn't chamber. :o Hit the forward assist get the round to chamber...it doesn't go at first... so now you realize that your either pushing it forcible with your thumb or you're hitting the forward assist with the palm of your hand to get the round chambered. It chambered :D You pull the trigger to send the next round down range ... and poop... everything locks up. Can't pull the charging handle to extract the spent casing ... nothing. So now you got to figure out how the hell do I fix this? (your problem now, not mine... that's for another story at another time. >:() So I would tell them, if for some odd reason you decide you want or need to use the forward assist... 1. always use your thumb... unless you don't have one. 2. only push on the forward assist 3 times. (any more than 3 times is bad, 3rd time is a charm type of thing) 3. only use lite to medium pressure when pushing on the forward assist. 4. if for some odd reason the round doesn't chamber by the 3rd try, STOP and clear the rifle. So that's my pennies worth on the forward assist. :ifly:

I need to give a +1 to these guys for helping me clear out my garage sale. Magwa Rsquared 98Z5V edgecrusher Sisco All transactions were smooth, a little slow on my part, but smooth none the less. keep an eye out for more garage sale to come.

That is new since I have left in 12/2013. Not sure why they would change a design that had no problems with it either. But when installing the cam pin into the bolt carrier, have the round part going forward.

would you consider trades? Are there any parts you might be looking for?

I'm not real familiar with POF... but it sounds to me that the gas block it self has been moved or might be off just a bit.

you have a copy of the plans you could post?

I've done the .458 SOCOM and a .50 AE. Sold off the .458 and kept the .50 AE. One down side I have found with the AE is that it is real particular about the ammo it shoots and different manufactures of ammo have different size rims on their casings. Because of that I broke an extractor and had to replace it. Overall, I like the .50 AE and it has a good punch to it coming out of a 16" barrel.

Welcome from Illinois...

why yes... yes I do... my gf and I out on the 4th with some friends for a nice ride.

if the rifle was on safe... and I was to believe it was. the trigger would not have been able to release the hammer to allow it to hit the firing pin causing it to fire that way. this is why we do (or at least I) believe it to be a true slam fire. just trying to figure out now if it was reloaded ammo issue or rifle parts issue.

i guess thats that... Ill just work my way up with the big boys then... <lmao>

Welcome from Illinois... across the river and north.

After the move, I need to clean out the garage. http://www.samson-mfg.com/mm5/merchant.mvc?Screen=PROD&Store_Code=SM&Product_Code=FS-001&Category_Code=TOOLS brand new in the box. only took it out to take the picture. asking $75 shipped Traded: Magwa https://armalite.com/shop/ar-10-supersass-handguard-gas-system-kit/ brand new in box. only opened it to take picture. asking $400 shipped Sold: Rsquared Old style M-15 National Match free float tube brand new in package. asking $60 shipped Sold: 98Z5V no pistol grip, old part number shown, new part number linked... https://armalite.com/shop/ar-10-b-series-lower-parts-kit-with-tactical-two-stage-trigger/ brand new never opened, with safety seal intact. asking $100 shipped Sold: edgecrusher https://armalite.com/shop/ar-10-spring-replacement-kit-to-be-used-with-two-stage-trigger/ brand new in wrapper, as of right now, only 2 available. asking $12 ea ... shipped Sold: edgecrusher https://armalite.com/shop/ar-10-field-repair-kit/ brand new in wrapper, as of right now, only 2 available. asking $50 ea... shipped Sold: Sisco all prices are somewhat negotiable even though they are low and include shipping. trades could be considered. as of right now there is nothing particular that I need or want, but if you have a good one, let me know. all monies will be either check, money order, or pay pal gift (to avoid fees)

yes... details please. I might be able to explain it.

ArmaLite has taken all information off the web site as of recent. I have been trying to put as much as I can back on here in order to help as much as I can.

ok... it's already established, the hammer was cocked back, weapon on safe, and finger was off the trigger. a loaded magazine was inserted, the bolt was pulled to the rear, the bolt was released by the bolt release on the side of the rifle. when the bolt lugs stripped the top round off the magazine, fed and chambered the round. the bolt stopped when it made contact with the barrel, the carrier continued forward locking the bolt into place. with the momentum of the BCG going forward, the firing pin (that floats inside the bolt) continued going forward after the BCG stopped... AND... boom. a couple things I haven't seen touched on yet... check the bolt face and look at the firing pin hole. Is it still perfectly round? how much of the firing pin protrudes out of the hole when checked? (do this check with everything stripped down and put the firing pin in the bolt by itself) How is your firing pin? look at the tip very closely and make sure it is not dimpled or have any pits in it. find out how long the firing pin actually is. Something else you might look at, and that is only if the firing pin tip is pitted or such... look at the primers of the previous fired rounds if possible. Look at how much the firing pin is dimpling those primers.

if that's the case... you already got it. it is just a really tight chamber. <thumbsup> Something to take a quick look at though, is the chamber again... I know, we have figured it out, there's nothing in the chamber, no identifying marks on the casing other than the normal ones from the feed ramps... it's not the marks you have to worry about. make sure you use a good solvent to clean any residual shipping oil or storage oil from the chamber also. oil after time of sitting will start to thicken. when it thickens, it gets tacky or sticky. and if it does that after being heated up from the hot brass, it cools off just as fast. holding onto the casing and taking up any available space between the casing and chamber wall, which could also cause a stuck casing. (just a thought)

BARRELS · AR-10 barrels are 4140 steel, chrome lined, button cut, and double lapped. · Eagle Arms standard barrels are chrome-moly, button cut, and double lapped. · M-15 barrels are 4150 steel, CMV (Chrome Moly Vanadium) MIL-B-11595-E (military spec) chrome lined, button cut, and double lapped. · All Stainless Steel barrels use AISI 416R stainless steel, button cut, and triple lapped. · Chrome lined and chrome moly barrels .750 at the journal (under the gas block). · Stainless steel barrels .875 at the journal (under the gas block). · All AR-10 barrels are NATO chambered and will accept 7.62 X 51 and .308 Winchester ammo. · M-15 stainless steel barrels (Wylde chamber) and chrome lined barrels (NATO chamber) will accept 5.56 X 45 and .223 Remington ammo. · All chrome-lined barrels are made from SAE 4140 or SAE 4150 steel and receive manganese phosphate per 5.3.1.2 of MIL-STD-171. BARREL EXTENSIONS · Threads on barrel extensions - (.223) 1-3/16 X 16 - (.308) 1 X 16. · Distance between barrel extensions and locking lugs - (.223) .497 +/- .005 - (.308) .610 +/- .005 UPPER and LOWER RECEIVERS · AR-10 uppers use 7175-T74 aluminum (forged) and lowers use 7175-T73 aluminum (forged). · M-15 uppers use 7075-T6 aluminum (forged) and lowers use 7075-T6 aluminum (forged). · All AR-10 and M-15 upper and lower receivers’ exterior: Hard coat anodized per MIL-A-8625, type 3, class 2, film thickness .0010+/- .0002, finish shall be lusterless (flat) color black # 37038 of Fed-Std-595, seal, grit blast prior to applying finish. ASSORTED PINS · AR-10 and M-15 hammer and trigger pins have an OD of .154. · M-15 pivot (.9” long) and takedown (1.14”) pins have an OD of .248 -.250. · AR-10 pivot (1.18”) and takedown pins (1.36”) have an OD of .2745 - .2755. · NM oversized pivot and takedown pins for M-15’s have an OD of .250 - .251. · NM oversized pivot and takedown pins for AR-10’s have an OD of .277 - .291. · AR-10 cam pin - .375 OD pin, .400 X .500 head. Doesn’t rotate within bolt carrier. · M-15 cam pin - .310 OD pin, .317 X .400 head. Rotates within bolt carrier. BOLT CARRIERS · AR-10 and M-15 bolt carriers are chrome lined on the inside (not the outside). · AR-10 and M-15 gas keys are chrome lined. · AR-10 bolts and carriers use 8620 steel. · M-15 bolts use 158 Carpenter steel and carriers use 8620 steel. · AR-10 and M-15 bolts and carriers are shot peened and grip blast finished. SIGHTS · EX3406 MWI Universal Flip Up Rear Sight – dual aperture dimensions .200 / .070. · NM M-15 rear sight – 1/4 MOA windage and 1/2 MOA elevation (integrated carry handle). · NM M-15 rear sight – 1/4 MOA windage and 1/2 MOA elevation (detachable carry handle). · NM AR-10 rear sight – 1/4 MOA windage and 1/4 MOA elevation (detachable carry handle). · All standard AR-10 and M-15 rear sights – 1/2 MOA windage and 1 MOA elevation. · All AR-10 and M-15 front sight posts have 4 detents per revolution. 1/4 turn up or down = 1 MOA · Jones sight kit (15806200) NM hooded sight parts kit apertures (# 2) .042, (# 3) .046, (# 4) .051, and (# 5) .055. · AR-10/M-15 front sight post height (base to tip) - .280 · AR-10/M-15 standard rear battle sight dual apertures .70 / .195 · AR-10/M-15 NM ramped front sight posts of .05, .06, and .07 (AR-10 receives 2 sets of these). GAS BLOCKS · M-15 top of gas block and upper receiver rail – top of gas block is .293 (+/- .010) lower than top of upper receiver. · AR-10 top of gas block and upper receiver rail – top of gas block is .398 (+/- .010) lower than top of upper receiver. · M-15 CMV chrome lined and NM SST barrel journal .750, 15T SST barrel journal .875 · AR-10 chrome lined and SST 10T carbine barrel journal .750, all other SST barrel journals are .875 · AR-10 Super SASS adjustable gas block length - .900. Journal is .875. · AR-10 / M-15 Gas Block Shim Spacer - .750 ID, .850 OD, .030 thick. MAG SPRINGS · Magazine springs for the AR-10, M-15, and AR-30 – stainless steel, type 17-7 pre-hardened ASTM A313. SCOPE MOUNTS · 1” = 25.4MM · 30MM = 1.18” Medium height - 1” and 30MM = 1.250” from top of upper receiver to center of scope rings (up to 50MM objective). High height - 1” and 30MM = 1.450” from top of upper receiver to center of scope rings (up to 60MM objective). 7/64” Allen wrench for scope ring screws. RECEIVER EXTENSION TUBES Receiver extension tubes use 6061-T6 extruded aluminum. · .223 / .308 rifle length 9-11/16” (inside depth) · .223 carbine length 6-15/16” (inside depth) · .308 carbine length 7-5/8” (inside depth) Commercial size tube O.D. - 1.165” – 1.167” (we don’t use this anymore) Military (G.I.) size tube O.D. – 1.145” – 1.147” (carbine and rifle) Thread size 1-3/16 X 16 BUFFER SPRINGS · .308 buffer spring rifle and carbine length 14-1/8” · .223 buffer spring rifle length 13-1/2” max – 11-3/4” min · .223 buffer spring carbine length 11-1/4” max – 10-1/16” min BUFFERS · .223 rifle length 5-7/8” – weight 5.2 oz · .308 rifle length 5-3/16” – weight 5.4 oz · .223 carbine length 3-1/4” – weight 3.0 oz · .308 carbine length 3-1/4” – weight 5.4 oz TORQUE SPECS · Bolt carrier gas key screws – 55 inch lbs · Barrel nut .223 – 35-65 ft lbs · Barrel nut .308 – 45-85 ft lbs · Barrel extensions .223 / .308 – 150 ft lbs · Receiver extension tube rifle – 35-39 inch lbs · Receiver extension tube carbine – 40 (+/- 2”) inch lbs and stake · Flash suppressor – 15-20 ft lbs · Gas blocks and A2 front sight bases – 65 inch lbs · SPR Mod 1 Barrel nut – 50-60 ft lbs BARREL THREAD SIZE (FLASH SUPPRESSORS AND MUZZLE BRAKES) · .223 / M-15 and 180B– 1/2”-28 · M-15 – 7.62 X 39 and 6.8 – 5/8”-24 · .308 / AR-10 – 5/8”-24 · .308, .300, and .338 / AR-30 – 5/8”-18 UNF-3A · .300 AR-30A1 – 5/8”-24 / .338 AR-30A1 – 3/4”-24 · .308 AR-31 – 5/8”-24 · 50BMG & .416 Barrett / 50A1 – 1”-14 UNS-3B AR-10 CRUSH WASHER – M-15 PEEL WASHER · AR-10 crush washer – 1/8” thick – 5/8” ID – 7/8” OD · M-15 peel washer – 1/16” thick – 1/2" ID – 5/8” OD TRIGGER WEIGHTS FROM FACTORY · Tactical two stage – 1st stage 3.5 lbs – 2nd stage 5-6 lbs (MIM – Metal Injected Molded) · NM two stage – 1st stage 2.5 lbs – 2nd stage 4.5-5 lbs (MIM – Metal Injected Molded) · Standard military trigger – 5.5-9.5 lbs (Cast) · Schilen single stage trigger (AR-50/AR-50A1 – AR-30/AR-30A1/AR-31) 4.5 lbs approximate Note: All triggers were cast until March of 2009. Only the single stage trigger is cast now. LENGTH OF PULL · AR-10 carbine (collapsed) – 11-1/8” - (extended) – 14-1/2” · M-15 carbine (collapsed) – 10-3/8” - (extended) – 14-1/2” · AR-10 rifle – 14-1/2” · M-15 rifle – 14-1/2” · AR-30 – (all) 13-1/2” · AR-30A1 – (standard) 13.5” (target) – 13.6 - 15.6 · AR-31 – (target) 13.6 – 15.6 · AR-50 - (all) 14.9” DETACHABLE FRONT SIGHT HEIGHT · E20151 M-15 detachable front sight – 1.395” height · EA5045 AR-10 detachable front sight – 1.531” height GAS TUBE LENGTH · M-15 rifle – 15-3/16” · M-15 mid length carbine – 11-3/4” · M-15 shorty carbine – 9-3/4” · AR-10 rifle – 15-1/2” · AR-10 mid length carbine – 12-1/16” · All gas tubes: .180 OD and .117 ID THREAD SIZE FOR UPPER RECEIVERS FOR BARREL NUTS · M-15 – 1-1/4” X 18 UNF-3A · AR-10 – 1-7/16” X 18 UNEF-3A * UNF = Unified Fine thread. UNEF = Unified Extra Fine thread. DISTANCE FROM BORE CENTERLINE TO TOP OF PICATINNY RAIL OF UPPER RECEIVER · M-15 – 1.213” · AR-10 – 1.318” GO GAGE CHAMBER SPEC INFORMATION (TOLERANCES FOR GOOD-TO-GO CHAMBERS) · AR-10 NATO – 1.633-1.638 (stainless steel, chrome moly, and chrome lined barrels) · M-15 NATO – 1.465-1.468 (chrome moly and chrome moly vanadium/chrome lined barrels) · M-15 WYLDE – 1.464-1.467 (stainless steel barrels) MCFARLAND GAS RING ACCEPTABLE OD DIMENSIONS · M-15 = .499 - .501 · AR-10 = .656 - .659 Note: There is no acceptable or unacceptable M-15 single gas ring OD dimensions as they flex within the bolt. M-15 AND AR-10 PORT DOOR ROD LENGTHS · M-15 (All) 3-7/8” long · AR-10 (Standard) 4-1/16” long · AR-10 (“T”) – 4-3/16” long – used also on any AR-10 that uses a free floated handguard FIREARM WEIGHTS (IN LBS) · 10A2F & 10A2BF = 9.2 · 10A4F & 10A4BF = 8.91 · LE10A4CBA2F = 9.0 · 10A4243BF = 8.95 · 10TNF & 10TBNF = 10.29 · 10TNF260 & 10TBNF260 = 10.51 · 10TBNF338 = 9.65 · 10SBF = 11.84 · A10SBF = 12.0 · 10A4BNMF = 11.49 · 10A2CF & 10A2CBF = 7.98 · 10A4CF & 10A4CBF = 7.75 · A10A4CBF = 7.94 · 10TCBNF = 8.61 · 15A2 & 15A2B = 7.93 · 15A2NM & 15A2BNM = 9.14 · 15A2C & 15A2CB = 7.01 · 15A4 & 15A4B = 7.68 · 15A4C & 15A4CB = 6.45 · 15A4C-6.8 & 15A4CB-6.8 = 6.43 · 15A4C-7.62X39 & 15A4CB-7.62X39 = 6.41 · 15A4CBA2K = 6.53 · 15A4NM & 15A4BNM = 9.8 · 15A4TN & 15A4TBN = 8.78 · LEC15A4CBK & LEC15A4CBK-1:7 = 6.35 · 15SPR1LB = 6.79 · 15SPR1CB = 7.43 · 15SPR1CB-6.8 = 7.41 · 15SPR1CB-7.62X39 = 7.39 SUGGESTED (GRAIN) AMMO FOR ALL FIREARMS, BARREL TWIST & GROOVE · M-15 (16” and 20”) CMV chrome lined barrels – 52-69 grain – 1:9 RH - 6 groove · M-15 (20”) SST barrels – 69-80 grain – 1:8 RH - 6 groove · M-15 (16”) 6.8 SPC II CMV chrome lined barrels – 110-115 grain – 1:11 RH - 4 groove · M-15 (16”) 7.62X39 CMV chrome lined barrels (bore .311) – 123 grain – 1:10 RH - 4 groove · M-15 SPR Mod 1 (16”) (shorty 6” gas system) CMV chromed lined barrels – 69-80 grain – 1:7 RH - 6 groove · M-15 SPR Mod 1 (16”) (mid-length 8” gas system) CMV chrome lined barrels – 52-69 grain – 1:9 RH - 6 groove · M-15 (16”) .22LR – CMV chrome lined barrels – 1:16 – 5 groove · AR-10 (16” and 20”) chrome lined barrels – 150-175 grain – 1:11.25 RH - 6 groove · AR-10 (20”) .243 chrome moly barrels – 90-100 grain – 1: 10 RH - 6 groove · AR-10 (22”) .260 SST barrels – 120-140 grain (139 and 140 grain functioned best) – 1:8 RH - 6 groove · AR-10T (16” & 20”) SST barrels – 150-185 grain – 1:10 RH - 6 groove · AR-10 (20”) SuperSASS SST barrels – 150-185 grain – 1:10 RH - 6 groove · AR-10 (20”) NM SST barrels – 168-185 grain - (Will stabilize 200 grain ammo) – 1:10 RH - 4 groove · AR-10 (22”) .338 Federal SST barrels – 185-200 grain (Max 225 grain ammo) – 1:10 RH - 6 groove TECHNICAL SPEC INFORMATION 2.pdf

I only have one on that currently. but it covers a wide selection. but the wylde chamber is big enough to cover both NATO and SAMMI. 223-556 Reamer dimensions.pdf

If you look through the attachments, you will notice the key .308 dimensions are just thousandths smaller than the 7.62. and in a properly cut chamber, it only takes a thousandth to throw anything off a little.

you will notice that all the .308 sizes are just a thousandths under the 7.60 sizes.