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Posted: 1/27/2018 1:55:59 PM EDT
[Last Edit: Combat_Diver]
[#1]
Quote HistoryOriginally Posted By Lancelot:
Were the Mk 18's with the standard FSB ever produced with no bayonet lug? CD  Attached File |
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TX, USA
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Posted: 1/27/2018 3:08:00 PM EDT
[Last Edit: TAPTAP556]
[#2]
CD - Thank you for your contributions here and in other threads.
Thank you for showing the pictures of the barrels. I wasn’t previously sure if the Colt barrels made it to the gov with front sight bases and drilled taper pins or blank. Do you drill the set screw holes or do they come that way from Colt? Are the gas blocks installed just with the set screws, or does any pinning take place by you? Also, is there any gun bluing or surface treatment put on the bare metal from the old taper pin holes? My 10.3” Colt build with a G rail. Cold bluing on the bare metal surfaces. Set screw dimples and pin hole drilled using BRD Engineering jigs: |
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Posted: 1/27/2018 3:11:08 PM EDT
[#3]
Quote HistoryOriginally Posted By TAPTAP556:
CD - Thank you for your contributions here and in other threads. Thank you for showing the pictures of the barrels. I wasn’t previously sure if the Colt barrels made it to the gov with front sight bases and drilled taper pins or blank. Do you drill the set screw holes or do they come that way from Colt? Are the gas blocks installed just with the set screws, or does any pinning take place by you? Also, is there any gun bluing or surface treatment put on the bare metal from the old taper pin holes? My 10.3” Colt build with a G rail. Cold bluing on the bare metal surfaces. Set screw dimples and pin hole drilled using BRD Engineering jigs: https://s13.postimg.org/cqm1kliwn/7_F30_D205-4_D15-4_F87-_A428-7_C8_CDFD68_CC2.jpg https://s13.postimg.org/pi07r40ef/E3_EF01_C5-069_B-4_EDC-9269-8_F7_F6_AFE1_BE0.jpg |
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Posted: 1/27/2018 3:19:31 PM EDT
[Last Edit: brodband8]
[#4]
Quote HistoryOriginally Posted By MILSPEC556:
Crane cuts and dimples the Colt barrels, which get sent to CD. And the blocks are just set screwed. (He may use loctite or rocksett on the set screws, I forget) but I do know he does not pin the blocks. |
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TX, USA
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Posted: 1/27/2018 3:29:12 PM EDT
[#5]
Quote HistoryOriginally Posted By MILSPEC556:
Crane cuts and dimples the Colt barrels, which get sent to CD. And the blocks are just set screwed. (He may use loctite or rocksett on the set screws, I forget) but I do know he does not pin the blocks. |
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Posted: 1/27/2018 3:41:28 PM EDT
[Last Edit: Combat_Diver]
[#6]
Lets back up a second. On Mk18 Mod 0, standard FSB is left in place and barrel is cut back and rethreaded by Crane.
On the Mk18 Mod 1/URG- Crane cuts back Colt Govt Profile barrels, removes the FSB, dimples the barrels for the set screws for the gas block, gas port opened to .070. Gas blocks are installed, set screws torqued in (Loctite on screws), Rocksett on FH and torqued to 25 in lbs. Taper pin slots are left in the white/ie no refinishing. Just recently just started getting in factory FN SOCOM 10.3" to same standards as crane (gas port dia, dimples, 1/2x28 threads) There are no taper pin slots. Bit more on gas block set screws. Once aligned, tighten set screws hand tight, back out and add one drop of Locktite 242 (not needed if set screws have locktite on them). Then torque set screws to 25 in lbs. Barrel nut is torqued to 50 in lbs to upper receiver, apply molybdenum disulfide grease to upper receiver threads. Here's one cut down Crane and FN SOCOM 10.3"s  Attached FileGetting it all together  Attached File Attached FileCD |
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Posted: 1/27/2018 4:12:41 PM EDT
[#7]
Quote HistoryOriginally Posted By JohnnySasaki20:
https://www.AR15.Com/media/mediaFiles/260264/LRM_EXPORT_20170324_125909-432669.JPG Any way I can get mine cleaned up a bit? I think the guy who etched mine was a little drunk. 
In other news: https://www.AR15.Com/media/mediaFiles/260264/LRM_EXPORT_20180127_074909-432672.JPGhttps://www.AR15.Com/media/mediaFiles/260264/LRM_EXPORT_20180127_074930-432673.JPG And its not pictured, but I just got the Geissele trigger in the mail yesterday, and I have a KAC front sight in the mail. I'll probably order a KAC rear and a TD grip soon, and then I think the upper is done. Then I can work on making my lower game not suck so much, lol. Is the QD TD foregrip clone correct? I hear the regular ones are hard as hell to get on. 
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TX, USA
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Posted: 1/27/2018 5:01:35 PM EDT
[Last Edit: TAPTAP556]
[#8]
Quote HistoryOriginally Posted By Combat_Diver:
Lets back up a second. On Mk18 Mod 0, standard FSB is left in place and barrel is cut back and rethreaded by Crane. On the Mk18 Mod 1/URG- Crane cuts back Colt Govt Profile barrels, removes the FSB, dimples the barrels for the set screws for the gas block, gas port opened to .070. Gas blocks are installed, set screws torqued in (Loctite on screws), Rocksett on FH and torqued to 25 in lbs. Taper pin slots are left in the white/ie no refinishing. Just recently just started getting in factory FN SOCOM 10.3" to same standards as crane (gas port dia, dimples, 1/2x28 threads) There are no taper pin slots. Bit more on gas block set screws. Once aligned, tighten set screws hand tight, back out and add one drop of Locktite 242 (not needed if set screws have locktite on them). Then torque set screws to 25 in lbs. Barrel nut is torqued to 50 in lbs to upper receiver, apply molybdenum disulfide grease to upper receiver threads. Here's one cut down Crane and FN SOCOM 10.3"s https://www.AR15.Com/media/mediaFiles/32677/IMG_4690-433008.JPG Getting it all together https://www.AR15.Com/media/mediaFiles/32677/IMG_4691_rz-433009.JPG https://www.AR15.Com/media/mediaFiles/32677/IMG_0608-433017.JPG CD Quote HistoryOriginally Posted By Combat_Diver:
Lets back up a second. On Mk18 Mod 0, standard FSB is left in place and barrel is cut back and rethreaded by Crane. On the Mk18 Mod 1/URG- Crane cuts back Colt Govt Profile barrels, removes the FSB, dimples the barrels for the set screws for the gas block, gas port opened to .070. Gas blocks are installed, set screws torqued in (Loctite on screws), Rocksett on FH and torqued to 25 in lbs. Taper pin slots are left in the white/ie no refinishing. Just recently just started getting in factory FN SOCOM 10.3" to same standards as crane (gas port dia, dimples, 1/2x28 threads) There are no taper pin slots. Bit more on gas block set screws. Once aligned, tighten set screws hand tight, back out and add one drop of Locktite 242 (not needed if set screws have locktite on them). Then torque set screws to 25 in lbs. Barrel nut is torqued to 50 in lbs to upper receiver, apply molybdenum disulfide grease to upper receiver threads. Here's one cut down Crane and FN SOCOM 10.3"s https://www.AR15.Com/media/mediaFiles/32677/IMG_4690-433008.JPG Getting it all together https://www.AR15.Com/media/mediaFiles/32677/IMG_4691_rz-433009.JPG https://www.AR15.Com/media/mediaFiles/32677/IMG_0608-433017.JPG CD Prior to the FN barrels, had you come across any of the Colt factory 10.3” barrels with proper gas port dia. (Not cut down by Crane)? Not that you know what goes on at Colt, but I’m just curious if those made it into any MK18s that you have seen. It looks like from the cut down in your picture above, the threads are also left in the “white” with no finish or treatment (clearly a cutdown), whereas my factory Colt 10.3” has finish on the threads. ETA: Do you generally see H1 or H2 buffers used in these? Lastly, and I realize this likely isn’t the right thread for the question, but any idea if the URGII will include Geissele gas blocks with their MK16 rails, or if they will remain as-is on the mil guns (not Geissele’s commercial URGII offering)? Answered in another thread: Offically only word I have is I've got work to do assembling. Talked to Bill G and was told assembled barrels with gas block and G barrel nut. Remove old barrel, install new barrel, tighten nut (one wrench per 10 rails) and then screw on new rail with T30 screws. Same S4P. Only word on gas blocks I've seen was G stating it was DD Mk12 GBs. Don't know yet until I actually get the kits. CD |
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Posted: 1/27/2018 5:32:28 PM EDT
[#9]
Decisions decisions.....
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TX, USA
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Posted: 1/27/2018 5:38:06 PM EDT
[Last Edit: TAPTAP556]
[#10]
Quote HistoryOriginally Posted By MILSPEC556:
Decisions decisions..... https://i.imgur.com/nbtamLJ.jpg https://i.imgur.com/MOiInqq.jpg I gave up on finding that 4 prong unicorn for a decent price. I wish SF would just make it available commercially. I wonder if it has the same tuning fork “ping” effect as the 3 prong when the bolt slams home...? |
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Posted: 1/27/2018 5:41:44 PM EDT
[#11]
Quote HistoryOriginally Posted By TAPTAP556:
Oh, yes! I gave up on finding that 4 prong unicorn for a decent price. I wish SF would just make it available commercially. I wonder if it has the same tuning fork “ping” effect as the 3 prong when the bolt slams home...? Quote HistoryOriginally Posted By TAPTAP556:
Originally Posted By MILSPEC556:
Decisions decisions..... https://i.imgur.com/nbtamLJ.jpg https://i.imgur.com/MOiInqq.jpg I gave up on finding that 4 prong unicorn for a decent price. I wish SF would just make it available commercially. I wonder if it has the same tuning fork “ping” effect as the 3 prong when the bolt slams home...? I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! 
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TX, USA
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Posted: 1/27/2018 6:04:37 PM EDT
[#12]
Quote HistoryOriginally Posted By MILSPEC556:
The ping is actually worse lol. I've owned a couple B.E.M. 249F's (most ping) this is my 3rd SF4P (second most ping) and the SF3P brings up the rear with the least ping of the 3. I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! 
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Posted: 1/27/2018 6:20:12 PM EDT
[#13]
Quote HistoryOriginally Posted By TAPTAP556:
Slightly off topic but KAC 3 prong has no detectable ping. https://s13.postimg.org/7cwg4b2qf/023_EB41_B-05_D3-4629-_B96_E-6_CCE12_DC0_FBC.jpg Quote HistoryOriginally Posted By TAPTAP556:
Originally Posted By MILSPEC556:
The ping is actually worse lol. I've owned a couple B.E.M. 249F's (most ping) this is my 3rd SF4P (second most ping) and the SF3P brings up the rear with the least ping of the 3. I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! https://s13.postimg.org/7cwg4b2qf/023_EB41_B-05_D3-4629-_B96_E-6_CCE12_DC0_FBC.jpg
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Posted: 1/27/2018 6:21:08 PM EDT
[#14]
Quote HistoryOriginally Posted By TAPTAP556: Slightly off topic but KAC 3 prong has no detectable ping. https://s13.postimg.org/7cwg4b2qf/023_EB41_B-05_D3-4629-_B96_E-6_CCE12_DC0_FBC.jpg |
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Posted: 1/27/2018 6:24:15 PM EDT
[#15]
Quote HistoryOriginally Posted By MILSPEC556:
The ping is actually worse lol. I've owned a couple B.E.M. 249F's (most ping) this is my 3rd SF4P (second most ping) and the SF3P brings up the rear with the least ping of the 3. I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! )
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Posted: 1/27/2018 6:28:41 PM EDT
[#16]
Quote HistoryOriginally Posted By drago6:
i've been torn between going nt4/KAC corncob and sf4p/RC2, the excessive ping may be a big factor in deciding that (who am i kidding, a year from now i'll still be trying to decide which can to go with )Quote HistoryOriginally Posted By drago6:
Originally Posted By MILSPEC556:
The ping is actually worse lol. I've owned a couple B.E.M. 249F's (most ping) this is my 3rd SF4P (second most ping) and the SF3P brings up the rear with the least ping of the 3. I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! )KAC pros- flash hider and gun OAL is shorter unsupressed, and the corncob can is THE iconic USSO suppressor Surefire- more effective flash hider, and more effective can (higher DB reduction) I would go with KAC all day personally. But the Surefire combo is a better performer |
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Posted: 1/27/2018 6:29:01 PM EDT
[#17]
Quote HistoryOriginally Posted By MILSPEC556:
The ping is actually worse lol. I've owned a couple B.E.M. 249F's (most ping) this is my 3rd SF4P (second most ping) and the SF3P brings up the rear with the least ping of the 3. I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! 
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Posted: 1/27/2018 6:35:37 PM EDT
[#18]
Quote HistoryOriginally Posted By MILSPEC556: I look at it like this. KAC pros- flash hider and gun OAL is shorter unsupressed, and the corncob can is THE iconic USSO suppressor Surefire- more effective flash hider, and more effective can (higher DB reduction) I would go with KAC all day personally. But the Surefire combo is a better performer |
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TX, USA
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Posted: 1/27/2018 6:37:33 PM EDT
[#19]
Quote HistoryOriginally Posted By MILSPEC556:
Very nice! I think for this upper I want to go with the KAC M4QD muzzle device or just stick with this A2 I have for now. I like the idea of short as possible so I might even throw a KAC MD on my block 2 CQBR. But that would mean I need to figure out what I'm gonna do with this SF4P now.
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Posted: 1/27/2018 6:41:42 PM EDT
[#20]
Quote HistoryOriginally Posted By JohnnySasaki20:
You don't know ping until you've shot an AAC SPR/M4, lol. Shit's like SONAR. https://i.imgur.com/jZzbaZY.gif Quote HistoryOriginally Posted By JohnnySasaki20:
Originally Posted By MILSPEC556:
The ping is actually worse lol. I've owned a couple B.E.M. 249F's (most ping) this is my 3rd SF4P (second most ping) and the SF3P brings up the rear with the least ping of the 3. I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! https://i.imgur.com/jZzbaZY.gif
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Posted: 1/27/2018 6:41:59 PM EDT
[#21]
Quote HistoryOriginally Posted By drago6: do you have any references/links in regards to the DB performance between the two cans? curious how close or far apart they are, if its a minor difference i'd lean towards KAC just because its uber cool, but if the SF is through and through a better can then that would seal the deal (for me at least) |
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Posted: 1/27/2018 6:47:59 PM EDT
[Last Edit: MILSPEC556]
[#22]
Quote HistoryOriginally Posted By drago6:
do you have any references/links in regards to the DB performance between the two cans? curious how close or far apart they are, if its a minor difference i'd lean towards KAC just because its uber cool, but if the SF is through and through a better can then that would seal the deal (for me at least) Quote HistoryOriginally Posted By drago6:
Originally Posted By MILSPEC556: I look at it like this. KAC pros- flash hider and gun OAL is shorter unsupressed, and the corncob can is THE iconic USSO suppressor Surefire- more effective flash hider, and more effective can (higher DB reduction) I would go with KAC all day personally. But the Surefire combo is a better performer http://www.surefire.com/suppressor-comparison-chart ETA silencer shop claims the NT4 has a 28dB reduction. Which doesn't directly compare to Surefires chart as that's remaining dB levels after suppression. Will keep digging. 
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Posted: 1/27/2018 7:01:01 PM EDT
[#23]
Quote HistoryOriginally Posted By MILSPEC556:
The ping is actually worse lol. I've owned a couple B.E.M. 249F's (most ping) this is my 3rd SF4P (second most ping) and the SF3P brings up the rear with the least ping of the 3. I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! Quote HistoryOriginally Posted By MILSPEC556:
Originally Posted By TAPTAP556:
Originally Posted By MILSPEC556:
Decisions decisions..... https://i.imgur.com/nbtamLJ.jpg https://i.imgur.com/MOiInqq.jpg I gave up on finding that 4 prong unicorn for a decent price. I wish SF would just make it available commercially. I wonder if it has the same tuning fork “ping” effect as the 3 prong when the bolt slams home...? I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo!
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Posted: 1/27/2018 7:04:23 PM EDT
[#24]
Quote HistoryOriginally Posted By SecretSquirell:
Stay away from the AAC Blackout. A stiff wind and that thing will ping. Quote HistoryOriginally Posted By SecretSquirell:
Originally Posted By MILSPEC556:
Originally Posted By TAPTAP556:
Originally Posted By MILSPEC556:
Decisions decisions..... https://i.imgur.com/nbtamLJ.jpg https://i.imgur.com/MOiInqq.jpg I gave up on finding that 4 prong unicorn for a decent price. I wish SF would just make it available commercially. I wonder if it has the same tuning fork “ping” effect as the 3 prong when the bolt slams home...? I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! |
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Posted: 1/27/2018 7:05:25 PM EDT
[#25]
Quote HistoryOriginally Posted By JohnnySasaki20:
You don't know ping until you've shot an AAC SPR/M4, lol. Shit's like SONAR. https://i.imgur.com/jZzbaZY.gif Quote HistoryOriginally Posted By JohnnySasaki20:
Originally Posted By MILSPEC556:
The ping is actually worse lol. I've owned a couple B.E.M. 249F's (most ping) this is my 3rd SF4P (second most ping) and the SF3P brings up the rear with the least ping of the 3. I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! https://i.imgur.com/jZzbaZY.gif
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Posted: 1/27/2018 7:06:40 PM EDT
[#26]
Quote HistoryOriginally Posted By JohnnySasaki20:
You don't know ping until you've shot an AAC SPR/M4, lol. Shit's like SONAR. https://i.imgur.com/jZzbaZY.gif Quote HistoryOriginally Posted By JohnnySasaki20:
Originally Posted By MILSPEC556:
The ping is actually worse lol. I've owned a couple B.E.M. 249F's (most ping) this is my 3rd SF4P (second most ping) and the SF3P brings up the rear with the least ping of the 3. I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! https://i.imgur.com/jZzbaZY.gif
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Posted: 1/27/2018 7:08:25 PM EDT
[#27]
Quote HistoryOriginally Posted By MILSPEC556:
I love me some ping bro. Bring me all the pings Quote HistoryOriginally Posted By MILSPEC556:
Originally Posted By SecretSquirell:
Originally Posted By MILSPEC556:
Originally Posted By TAPTAP556:
Originally Posted By MILSPEC556:
Decisions decisions..... https://i.imgur.com/nbtamLJ.jpg https://i.imgur.com/MOiInqq.jpg I gave up on finding that 4 prong unicorn for a decent price. I wish SF would just make it available commercially. I wonder if it has the same tuning fork “ping” effect as the 3 prong when the bolt slams home...? I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo!
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Posted: 1/27/2018 7:15:00 PM EDT
[#28]
Quote HistoryOriginally Posted By SecretSquirell:
I don't mind a little ping, but when you set the gun down a little too hard and it rings that's a bit excessive. Quote HistoryOriginally Posted By SecretSquirell:
Originally Posted By MILSPEC556:
Originally Posted By SecretSquirell:
Originally Posted By MILSPEC556:
Originally Posted By TAPTAP556:
Originally Posted By MILSPEC556:
Decisions decisions..... https://i.imgur.com/nbtamLJ.jpg https://i.imgur.com/MOiInqq.jpg I gave up on finding that 4 prong unicorn for a decent price. I wish SF would just make it available commercially. I wonder if it has the same tuning fork “ping” effect as the 3 prong when the bolt slams home...? I think the horizontal cuts inside of the 249F tines is what makes it worse. But if there's one thing I've learned, its embrace the ping mofo! Attach sling (HK hook)- PIIIIING Set gun down stock first- PIIIIING Hit bolt release- PIIIIIINGGGG Charge a round into the chamber- PIIIIIIIIIIIIING-A-RIIIIIIIING-A-DIIIIIIING-A-RINGADIIIIIIIIIIIIIIIIIIINGG Ill shut up now.
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Posted: 1/27/2018 7:33:53 PM EDT
[#29]
Keep their head's ringin'. Swapped my M249F on a 13.7 build to a Dead air FH and the difference as huuuuuuge.
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Posted: 1/27/2018 10:01:02 PM EDT
[#30]
Would a SF4P be completely wrong on a mod 0? Does anyone have a pic with one?
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Posted: 1/27/2018 10:33:32 PM EDT
[#31]
Quote HistoryOriginally Posted By ChandlerKJ:
Would a SF4P be completely wrong on a mod 0? Does anyone have a pic with one? |
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Posted: 1/27/2018 10:50:19 PM EDT
[#32]
Quote HistoryOriginally Posted By ChandlerKJ:
Would a SF4P be completely wrong on a mod 0? Does anyone have a pic with one? CD |
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Posted: 1/27/2018 11:00:38 PM EDT
[Last Edit: Combat_Diver]
[#33]
Quote HistoryOriginally Posted By TAPTAP556:
Great information and detail. Thanks. Prior to the FN barrels, had you come across any of the Colt factory 10.3” barrels with proper gas port dia. (Not cut down by Crane)? Not that you know what goes on at Colt, but I’m just curious if those made it into any MK18s that you have seen. It looks like from the cut down in your picture above, the threads are also left in the “white” with no finish or treatment (clearly a cutdown), whereas my factory Colt 10.3” has finish on the threads. ETA: Do you generally see H1 or H2 buffers used in these? ETA2: Picture Colt MK18 Mod 0.5 not clone correct (KAC micro, PRI combat latch, Surefire 3 prong, RC2 can), else correct.
Colt G gun KAC SR15 https://s13.postimg.org/i8ntznno7/8378_CB37-6984-4_E14-8_FFD-475_CFAD41_D8_E.jpg 1. All of the 10.3" I've seen where Colt bbls ALL cut down by Crane. Haven't seen or identified any Factory Colt 10.3" for Mk18 Mod 1s/URGs. Haven't rebarreled any Mk18 Mod 0s as we aren't currently using them so can speak for those barrels. 2. Yes, Crane leaves the threads unfinished. FN SOCOM threads are fininshed, it comes with a rubber cap on it. 3. H2 are issued with standard M4A1 carbines and Mk18 Mod 1/URGs. Again on the Mk18 Mod 0s can't say as I haven't seen any in couple years now. 4. Nice toys
CD |
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Posted: 1/27/2018 11:10:05 PM EDT
[#34]
Quote HistoryOriginally Posted By drago6: do you have any references/links in regards to the DB performance between the two cans? curious how close or far apart they are, if its a minor difference i'd lean towards KAC just because its uber cool, but if the SF is through and through a better can then that would seal the deal (for me at least) |
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Posted: 1/27/2018 11:19:11 PM EDT
[#35]
Quote HistoryOriginally Posted By Combat_Diver:
Never seen anything in writing the Technical Manuals, Illustrated Parts Breakdown (IPB) or Technical Repair Standard (TRS) all of the Mk18 Mod 0s had the standard FSB. CD https://www.AR15.Com/media/mediaFiles/32677/IMG_1982-432879.JPG Quote HistoryOriginally Posted By Combat_Diver:
Originally Posted By Lancelot:
Were the Mk 18's with the standard FSB ever produced with no bayonet lug? CD https://www.AR15.Com/media/mediaFiles/32677/IMG_1982-432879.JPG 
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Posted: 1/27/2018 11:47:48 PM EDT
[#36]
Quote HistoryOriginally Posted By MILSPEC556:
CD, do you recall if any of this group of guns had an A2 flash hider? Trying to justify not having to buy a KAC M4QD just yet. Quote HistoryOriginally Posted By MILSPEC556:
Originally Posted By Combat_Diver:
Originally Posted By Lancelot:
Were the Mk 18's with the standard FSB ever produced with no bayonet lug? CD https://www.AR15.Com/media/mediaFiles/32677/IMG_1982-432879.JPG CD |
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Posted: 1/27/2018 11:59:08 PM EDT
[#37]
I know these have been posted before but a nice video from our own ECP with trigger time behind both units.
 Failed To Load Title Also both of these guys are pretty stout. Originally Posted By ECPrevatte:
Before I get back to real work: NT4 vs. SF weights: https://c7.staticflickr.com/9/8185/29601441526_7d0dfbb079_b.jpg Surefire RC - New vs. Now (20K in about 2 years - 2 ounce gain): https://c5.staticflickr.com/9/8285/29346460780_3a18fd401d_b.jpg Brand New SFRC 5.56 (not the RC2): 17.4 ounces https://c8.staticflickr.com/4/3928/15437863295_d9fd0e5113_b.jpg NT4 has maybe 2K rounds through it. So the difference in ammo is about ~18K or so. Most of that ammo is XM193/XM855. |
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Posted: 1/28/2018 12:04:40 AM EDT
[#38]
Quote HistoryOriginally Posted By Combat_Diver:
Yes, couple had standard A2 flash hinders CD Quote HistoryOriginally Posted By Combat_Diver:
Originally Posted By MILSPEC556:
Originally Posted By Combat_Diver:
Originally Posted By Lancelot:
Were the Mk 18's with the standard FSB ever produced with no bayonet lug? CD https://www.AR15.Com/media/mediaFiles/32677/IMG_1982-432879.JPG CD
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Posted: 1/28/2018 12:06:48 AM EDT
[#39]
Quote HistoryOriginally Posted By SecretSquirell:
I don't mind a little ping, but when you set the gun down a little too hard and it rings that's a bit excessive. |
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Posted: 1/28/2018 12:13:39 AM EDT
[#40]
Quote HistoryOriginally Posted By cjwwd2:
The worst is the BE Meyers 249...that thing is so loud even racking the bolt Quote HistoryOriginally Posted By cjwwd2:
Originally Posted By SecretSquirell:
I don't mind a little ping, but when you set the gun down a little too hard and it rings that's a bit excessive.
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Posted: 1/28/2018 1:23:39 AM EDT
[Last Edit: WUPHF]
[#41]
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Posted: 1/28/2018 1:33:40 AM EDT
[#42]
Quote HistoryOriginally Posted By MILSPEC556:
Decisions decisions..... https://i.imgur.com/nbtamLJ.jpg https://i.imgur.com/MOiInqq.jpg |
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Posted: 1/28/2018 1:39:42 AM EDT
[#43]
Quote HistoryOriginally Posted By krdt:
Hmm, other than the initial investment for the jig and router, that is a pretty tempting price point for getting about as accurate a semi-auto lower as possible. Probably would need to buy 2 or 3 lowers to practice until I got one perfect enough that I'd want to Form 1 it (never milled an 80% before). I guess I could just look at the up front costs as an investment in being covered for lowers... basically from now on, lol. Thanks for the info. Assuming it was a good experience, you mind posting or PM'ing me the engraver you used? Did you just provide images for the roll mark and other details? Quote HistoryOriginally Posted By krdt:
Originally Posted By SecretSquirell:
Spit balling here: $35 for the lower, $65 for engraving, $75 for ano........so $175 ish.
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Posted: 1/28/2018 1:41:46 AM EDT
[Last Edit: MILSPEC556]
[#44]
Quote HistoryOriginally Posted By Conspiro-Agnew:
Just out of curiosity, what would a used SF4P go for in the condition of yours in the photo? I have 2 I think I'm going to let go of, since I got the closed tine flash hiders recently and like them better. (Hate the ping) Quote HistoryOriginally Posted By Conspiro-Agnew:
Originally Posted By MILSPEC556:
Decisions decisions..... https://i.imgur.com/nbtamLJ.jpg https://i.imgur.com/MOiInqq.jpg |
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Posted: 1/28/2018 2:11:07 AM EDT
[#45]
Anyone have a lead on a tan Surefire UE-07?
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Posted: 1/28/2018 2:14:18 AM EDT
[#46]
Quote HistoryOriginally Posted By Combat_Diver:
Most that run a Mk18 Mod 0 in the service usually don't have a suppressor. Haven't seen one but if I had a unit that had the RC suppressors the SF4P would be put on. CD Quote HistoryOriginally Posted By Combat_Diver:
Originally Posted By ChandlerKJ:
Would a SF4P be completely wrong on a mod 0? Does anyone have a pic with one? CD
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Posted: 1/28/2018 6:38:25 AM EDT
[#47]
Quote HistoryOriginally Posted By Combat_Diver:
Rattled canned my gun today. Might add some more olive drab green come spring time however. Degreased with isopropel alcohol, then issued paint with laundry bag. Didn't like the Hogue grip as it rubbed on the selector switch rotating so switched it out for a FDE pistol grip from a Mk17 SCAR.
https://www.AR15.Com/media/mediaFiles/32677/IMG_4703-428821.JPG https://www.AR15.Com/media/mediaFiles/32677/IMG_4704-428822.JPG CD |
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IN, USA
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Posted: 1/28/2018 6:43:53 AM EDT
[#48]
Got a new to me m961 with the hard to find tailcap for my mod0ish build. Pretty happy with the outcome of this clone. I should've jumped when I had the chance to get a Wilcox m2 mount from brownell's when they were last in stock but my funds were tight from all the other crap I was chasing down. There's always next time. Prob won't shoot it much in this config. That light is a monster. I need another 10.3" barrel so I don't have to swap around accessories from mod0 to b1/1.5. There is soo much purple showing on the m4 in that lighting.
M4 upper came with a raised C forge mark. 
M4 upper bbl dated 2004, and ras dated 2003. 
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Posted: 1/28/2018 8:58:12 AM EDT
[#49]
Quote HistoryOriginally Posted By MILSPEC556:
I haven't stayed much up to date on SF4P prices at all, for probably over a year and a half. You're probably better off asking StevieJ or Roadblock that one Quote HistoryOriginally Posted By MILSPEC556:
Originally Posted By Conspiro-Agnew:
Originally Posted By MILSPEC556:
Decisions decisions..... https://i.imgur.com/nbtamLJ.jpg https://i.imgur.com/MOiInqq.jpg |
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Posted: 1/28/2018 12:37:12 PM EDT
[#50]
I have a DD MK18 Upper from Brownell’s with an inspection date of 3.24.17. Anyone know when they started doing the .070 port size on these? Am I good to go?
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