User Panel
User Panel
User Panel
|
Posted: 1/15/2016 10:19:49 AM EDT
[#1]
Have you checked to see if the Mk4 rail works with the Mega billet upper? I'm pretty sure it doesn't.....
I recently asked about the comparability of the Mk4 with a Seekins billet upper in a couple of different threads and both times someone commented that the Geissele rail wouldn't work with a MEGA billet upper. It may work if you're willing to modify the rail...not something I'd want to do personally. http://www.ar15.com/forums/t_2_444/272801_Mk4_MLOK_handguard_compatible_with_Seekins_SP223_billet_upper_.html&page=1&anc=bottom#bottom http://www.ar15.com/forums/t_3_4/687702_Geissele_MK4_MLOK_handguard_with_Seeiins_SP223_billet_upper_comparability__.html |
|
|
|
Posted: 1/15/2016 2:59:54 PM EDT
[#2]
Quote HistoryQuoted:
Have you checked to see if the Mk4 rail works with the Mega billet upper? I'm pretty sure it doesn't..... I recently asked about the comparability of the Mk4 with a Seekins billet upper in a couple of different threads and both times someone commented that the Geissele rail wouldn't work with a MEGA billet upper. It may work if you're willing to modify the rail...not something I'd want to do personally. http://www.ar15.com/forums/t_2_444/272801_Mk4_MLOK_handguard_compatible_with_Seekins_SP223_billet_upper_.html&page=1&anc=bottom#bottom http://www.ar15.com/forums/t_3_4/687702_Geissele_MK4_MLOK_handguard_with_Seeiins_SP223_billet_upper_comparability__.html Yes, I'm aware that it will require some minor modifications to make it work. Wish I didn't have to but I really like the rail and it shouldn't be too hard to get it right. I'll post pics of the modification required |
|
|
|
Posted: 1/15/2016 3:10:47 PM EDT
[#3]
As stated above, the rail doesn't work because of the anti-rotating system. I have a MK2 on my billet upper that required some modification and is now basically proprietary to that upper. Luckily, Mega Arms is just a skip away from where I live. Can't say enough about the quality of their work/willingness to help a customer out.
-Andrew |
|
|
|
Posted: 1/15/2016 3:19:19 PM EDT
[#4]
This is why I always do the Mega GTR-3S with a Mega forged upper. Way less weight and works with everything.
|
|
|
|
Posted: 1/15/2016 7:42:35 PM EDT
[#5]
Came home to a few packages delivered and was able to start on the lower. Got most everything done. Just need stock buffer and magpul grip to finish it (put A2 grip on for now)
|
|
|
|
Posted: 1/19/2016 3:25:47 AM EDT
[#6]
Quote HistoryQuoted:
Came home to a few packages delivered and was able to start on the lower. Got most everything done. Just need stock buffer and magpul grip to finish it (put A2 grip on for now) http://i102.photobucket.com/albums/m100/vortechsq/A9731CA4-EA76-46F4-88B5-104C28045DEC.jpg http://i102.photobucket.com/albums/m100/vortechsq/0CAA8642-A048-4CEE-BCB4-599583D8B752.jpg http://i102.photobucket.com/albums/m100/vortechsq/833D0CA8-277A-4AEB-AB02-5FD9DC55236D.jpg I have that same lower in my AR Love it...great quality |
|
|
|
Posted: 1/19/2016 8:29:08 PM EDT
[#7]
Lots of packages came today. Giessele rail with a ton of swag! Rainier barrel, Fortis brake, gas tube, dust cover, forward assist, and Seekins enhanced bolt catch. Hope to find some time this weekend to start assembly.
|
|
|
|
Posted: 1/20/2016 11:51:33 AM EDT
[#8]
I just fitted the Giessele rail to the Mega Billet Upper. 5 minutes with a Dremel (sandpaper wheel and small stone). Don't let this discourage you from using the rail on a billet upper...it was a piece of cake to modify and rotation tabs are still in place. Just take your time and remove a little material at a time.
I test fitted and traced the rail with pencil where material needed to be removed 
Rail after using the dremel 
Then I used some Birchwood Casey Aluminum Black to color the rail (I couldn't see any bare aluminum when rail was installed) 
Final fitment to upper. Fits like a glove now. 
|
|
|
|
Posted: 1/20/2016 12:04:27 PM EDT
[#9]
Good job on getting it to fit correctly! If you don't mind me asking, why is it that the rail needs to be modified for billet uppers only?
|
|
|
|
Posted: 1/20/2016 12:20:06 PM EDT
[#10]
Quote HistoryQuoted:
Good job on getting it to fit correctly! If you don't mind me asking, why is it that the rail needs to be modified for billet uppers only? Thanks. Most billet uppers are thicker than mil spec at the front of the receiver where the anti-rotation tabs are on the rail. If the rail didn't have the anti-rotation tabs it would fit like every other upper/rail would. |
|
|
|
Posted: 1/20/2016 3:32:31 PM EDT
[#11]
Rainier barrel and Gissele low profile gas block installed
|
|
|
|
Posted: 1/20/2016 3:37:02 PM EDT
[#12]
Great build so far!
|
|
|
|
Posted: 1/20/2016 3:44:40 PM EDT
[#13]
Upper is done except for the muzzle brake. I'm in MA so will need to pin and weld it when I get a chance.
|
|
|
|
Posted: 1/20/2016 3:46:36 PM EDT
[#14]
Rock River A2 operator stock kit
|
|
|
|
Posted: 1/22/2016 3:24:58 PM EDT
[#15]
Rifle is pretty much done, just waiting on the Magpul grip and still need to decide on optics. I'm real happy with how it came out. Picture is from my phone so it's not the best, but you get the idea
|
|
|
|
Posted: 1/22/2016 3:41:44 PM EDT
[#16]
Nice job.
|
|
|
|
Posted: 1/22/2016 10:42:56 PM EDT
[#17]
lookin good. Nice job
|
|
|
|
Posted: 1/23/2016 12:19:44 AM EDT
[#18]
Nice job. I'm not crazy about the stock, I'd like to see one of those ACE skeleton stocks on it. Not sure why though.
 |
|
|
|
Posted: 1/23/2016 11:19:16 AM EDT
[#19]
I guess the Mega billet upper is thicker at the base cause my Mk4 fit just fine without modification on my Vltor MUR upper
|
|
|
|
Posted: 1/23/2016 10:05:19 PM EDT
[#20]
Looks great!
|
|
|
|
Posted: 2/3/2016 8:48:53 AM EDT
[#21]
I've decided on a Leupold Mark AR MOD 1 3-9x40mm scope with their firedot mil recticle. Will be mounting it using an Aero Precision scope mount. Should have have it this week and then I can hit the range to break her in
|
|
|
|
Posted: 2/5/2016 4:26:40 PM EDT
[#22]
Aero Precision scope mount and Leupold Mark AR 3-9x40 scope arrived and mounted. Hope to hit the range with it soon!
|
|
|
|
Posted: 2/8/2016 11:02:40 AM EDT
[#23]
Quote HistoryQuoted:
Upper is done except for the muzzle brake. I'm in MA so will need to pin and weld it when I get a chance. <a href="http://s102.photobucket.com/user/vortechsq/media/0A12AB4C-C13B-437A-8C79-9A5C9114AEE1.jpg.html" target="_blank">http://i102.photobucket.com/albums/m100/vortechsq/0A12AB4C-C13B-437A-8C79-9A5C9114AEE1.jpg</a> <a href="http://s102.photobucket.com/user/vortechsq/media/4E7DBB3E-F4E4-47CE-A1CA-3C54A2320E0F.jpg.html" target="_blank">http://i102.photobucket.com/albums/m100/vortechsq/4E7DBB3E-F4E4-47CE-A1CA-3C54A2320E0F.jpg</a> |
|
|
|
Posted: 2/8/2016 11:21:45 AM EDT
[#24]
Quote Historyturbo: Why the muzzle brake? A flash hider is more appropriate and authentic for a heavy SPR-type rifle. Perhaps you MA state laws forbid certain military features. - CW
Bingo! MA still follows the AWB so no flash hider, brake needs to be pinned/welded, no adjustable stock or bayonet lug. It sucks, I'd rather run a flash hider. The muzzle brakes are LOUD! This state is not very fun friendly. Handgun laws are even worse |
|
|
|
Posted: 2/19/2016 7:24:58 PM EDT
[#25]
Well OP, thanks to you I'm going to do the same modification.
The SLR Solo rail is out of stock everywhere and I'm not waiting 10-15 days for them to come back. Gotta ask, did you leave those set screws long or did you cut them short? It looks like they were standing tall in a few of your photos. |
|
|
|
Posted: 2/19/2016 8:17:25 PM EDT
[#26]
The set screws sit flush and I didn't have to modify them at all. You can see one in the picture with the scope. The earlier pictures were just when I test fit the rail
|
|
|
|
Posted: 2/28/2016 11:35:57 AM EDT
[#27]
Quote HistoryQuoted:
The set screws sit flush and I didn't have to modify them at all. You can see one in the picture with the scope. The earlier pictures were just when I test fit the rail I fit mine without issue. It took a while grinding and test fitting, but came out fine. The grub screws didn't want to sit completely flush so I used a cutting disk to remove about 1/16" from each, rounded the tip, and screwed them in. Fits tight with top rail matching perfectly. For what it's worth, an SLR sentry 7 fits fine under the mk4 with room to spare. |
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
