GL/SSC Block 2

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04-11-19, 08:05
Ftrinida1

GL/SSC Block 2

M203 is a Colt 40mm DD with a 9" LMT barrel. Barrel is a 12.5" Daniel Defense gov profile with a Black River Tactical .0635 insert since the factory port is .073. Muzzle device is a KAC NT4 that will host a taupe NT4 suppressor once it clears. Upper is a Colt Cerro with a stamped C with a PRI gas buster CH and Colt BCG. Lower is a SBR'd 2018 "Property of US Government" marked Colt M4A1 with a CQD mount, Colt H2, B5 gen 1 contract overrun on 4 pos tube, custom polished stock Colt trigger group, 4lb hammer spring from MCarbo, and a shaved A2 grip with some electrical tape for grip. On the rail is a full power PEQ-15, NAVSEA marked rotation WMX200, Insight dual switch, KAC irons with a large knob 2-600m rear. Optic is a gen 2 SU230 marked Elcan 1-4x with a ARMS 2 mount and a 7MOA Docter on top. Waiting for my transferable M16A1 lower to clear to use with this build as well. I'll be putting the VLTOR A5 buffer system with a Geissele SSF on that.https://uploads.tapatalk-cdn.com/201...fe8bfef458.jpg

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04-11-19, 08:59
Nowski87

Well, that is just cool
04-11-19, 12:27
jpmuscle

I love how this brand new guy shows up and drops a grenade like this.

Love it

Also, when did full power PEQs come with the safety screws on the side of the housing

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04-11-19, 12:36
Ftrinida1

Quote:

Originally Posted by jpmuscle

I love how this brand new guy shows up and drops a grenade like this.

Love it

Also, when did full power PEQs come with the safety screws on the side of the housing

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They always did. LA-5s are the ones with the screws on the top.

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04-11-19, 14:33
Clint

Nice!

How does it run?
04-11-19, 18:07
Ftrinida1

Quote:

Originally Posted by Clint

Nice!

How does it run?

Only got it to cycle but not lock back with a carbine buffer and AE M855 so I'll probably take out that Black River Tactical insert but I'd like to try it out with a LMT enhanced BCG and/or VLTOR A5 since it's a pain is the ass getting to the gas block. Ran prefect with the NT4 though as expected with the extra gas. The DD barrel was extremely accurate when I sighted my irons at 25 yards. Will report back after I hit 50 and 100 but the 203 is completely freefloated unlike the RIS II FSP with the launcher (bayonet lug). Shot some mini slugs and it was a blast. I'm using the Docter on top for the shotgun shots.https://uploads.tapatalk-cdn.com/201...1dbdbdc155.jpg https://uploads.tapatalk-cdn.com/201...e6cdba9842.jpg

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04-11-19, 22:47
Ftrinida1

Quote:

Originally Posted by Clint

Nice!

How does it run?

I probably just got the wrong size. The .070 insert works prefect on my 10.3 with an oversized port. Awesome product.

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04-12-19, 12:44
sig1473

That's just filthy.......
04-13-19, 12:07
Clint

The LMT Enhanced BC sometimes does not play nicely with smaller ported barrels.

Try swapping that out and checking for gas leaks.

Otherwise, the port size may just need to go up a size.

Quote:

Originally Posted by Ftrinida1

Only got it to cycle but not lock back with a carbine buffer and AE M855 so I'll probably take out that Black River Tactical insert but I'd like to try it out with a LMT enhanced BCG and/or VLTOR A5 since it's a pain is the ass getting to the gas block. Ran prefect with the NT4 though as expected with the extra gas. The DD barrel was extremely accurate when I sighted my irons at 25 yards. Will report back after I hit 50 and 100 but the 203 is completely freefloated unlike the RIS II FSP with the launcher (bayonet lug). Shot some mini slugs and it was a blast. I'm using the Docter on top for the shotgun shots.
04-13-19, 12:16
Ftrinida1

Right now, it's a brand new Colt BCG and it's a little tight. I don't have the LMT yet. I'll try my old parkerized one with a worn in buffer spring and some IMI ammo. Haven't seen any signs of leaks. Interestingly, when I had the heavy Elcan off the gun, it was locking back with the H2. When I put the Elcan on it, wouldn't even cycle with the H2. I was holding the rifle as tight as I could into my shoulder without testing the magazine.

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04-13-19, 12:17
Ftrinida1

I meant resting the magazine

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04-13-19, 23:51
Ftrinida1

Quote:

Originally Posted by Clint

The LMT Enhanced BC sometimes does not play nicely with smaller ported barrels.

Try swapping that out and checking for gas leaks.

Otherwise, the port size may just need to go up a size.

The worn in spring did the trick. Kept everything else the same and it even locked back on a cold rainy 58° day. There is no recoil to speak of. The picture is by no means an accuracy test but the top left is checking the zero on my KAC irons with two shots and the others are getting the old not-so-tight Elcan in the ballpark for 100 yards. This was all done at 50 yards with 1" stickers and 77gr IMI Razor Core then it started raining real hard so I called it a day. Extremely happy with the Daniel Defense barrels I have.https://uploads.tapatalk-cdn.com/201...1cdbcb4b74.jpg

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04-15-19, 09:49
TMS951

Are you shooting the slugs out of the granade launcher?

Pics of how that works?
04-15-19, 10:01
Ftrinida1

Quote:

Originally Posted by TMS951

Are you shooting the slugs out of the granade launcher?

Pics of how that works?

Yes, I'm using a 40mm to 12GA adapter. Here's a pic of it on my M4A1. The shells in the picture actually dislodged something in the elevation adjustment on the Elcan while shooting so I'm afraid to shoot it with the optic mounted using normal sized shells. I'm gonna try to see if 12GA to 20GA insert works in the adapter.https://uploads.tapatalk-cdn.com/201...05961df39e.jpg

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04-17-19, 16:18
adh

definitely one of the most bad ass builds EVER posted in the Custom Build Forum
04-25-19, 15:00
wrxdwpsti

Quote:

Originally Posted by jpmuscle

I love how this brand new guy shows up and drops a grenade like this.

literally
05-02-19, 23:28
Ftrinida1

Didn't think this could get any more ridiculous but here we arehttps://uploads.tapatalk-cdn.com/201...8c7aad8983.jpg

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05-03-19, 01:27
Diamondback

So jelly I'm liquifying here. :p (Personally, I prefer FSB-slot fixed sights for short builds, but when chasing unicorns one takes any win one can get.) If I could get a brace that mimics the looks of a SOPMOD, a "pistolized GL/SSC" would be one of my first choices for a Home D gun, maybe even for a Hiking Carry with a 37mm blooptube carrying smoke/flares/star-shell for emergency signaling.

Did anyone ever hear about if SOCOM or anybody else ever did anything with the 12.5" can-plus-M203 concept after this? I thought I heard something about some West Coast Navy units brewing up their own improvised version with 10.75" KAC URX II's, but never saw anything to confirm and can't remember the source, kinda like the one I heard about a West Coast EOD variant of the Mark 18 built around CASV-EL's.
05-03-19, 04:35
Firefly

I see you have a 40mm DD. Tell me, how...how much...where...and idls it possible to get WP shells?

I need to know. It's for duck hunting...
05-03-19, 08:48
Ftrinida1

Quote:

Originally Posted by Diamondback

So jelly I'm liquifying here. [emoji14] (Personally, I prefer FSB-slot fixed sights for short builds, but when chasing unicorns one takes any win one can get.) If I could get a brace that mimics the looks of a SOPMOD, a "pistolized GL/SSC" would be one of my first choices for a Home D gun, maybe even for a Hiking Carry with a 37mm blooptube carrying smoke/flares/star-shell for emergency signaling.

Did anyone ever hear about if SOCOM or anybody else ever did anything with the 12.5" can-plus-M203 concept after this? I thought I heard something about some West Coast Navy units brewing up their own improvised version with 10.75" KAC URX II's, but never saw anything to confirm and can't remember the source, kinda like the one I heard about a West Coast EOD variant of the Mark 18 built around CASV-EL's.

I agree, the mk18 mod 0 is one of my favorite setups and I use it for HD. Didn't really intend for this build to fit any of my practical applications.

Not sure about your question though.

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05-03-19, 08:51
Ftrinida1

Quote:

Originally Posted by Firefly

I see you have a 40mm DD. Tell me, how...how much...where...and idls it possible to get WP shells?

I need to know. It's for duck hunting...

I got the Colt 40mm marked receiver from ArmsUnlimited back when they were in stock for about 1400 and did a regular firearm transfer. I bought the 40mm barrel somewhere else and did a form 1 E-file. I haven't seen any DD shells anywhere. I've only shot shotguns shells through it so far.

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05-04-19, 05:52
Firefly

I see. If anyone knows a legal way to get WP rounds I need to know.

... for duck hunting
05-04-19, 10:50
jpmuscle

Quote:

Originally Posted by Firefly

I see. If anyone knows a legal way to get WP rounds I need to know.

... for duck hunting

Is it possible to roll your own?

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05-04-19, 15:19
docsherm

Quote:

Originally Posted by jpmuscle

Is it possible to roll your own?

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Not for duck hunting ............
12-28-19, 22:07
JediGuy

I missed this previously, somehow.

This. This build is the best I’ve ever seen. Came up while I was trying to research the 12.5” GL/SSC via Google. Beautiful.
12-29-19, 01:14
Error404

My God!

I have always wanted a m203 on a rifle... but it has to come with a crate of HE 40mm

Looking sweet OP but do us a favor.... post a video once you get that fun switch!
01-15-20, 21:18
Ftrinida1

Update: LMT gen 1 FDE and enhanced carrier, tano G33, NAVSEA SU-231A, SSF trigger, VLTOR A5 H2 w/ green Sprinco, NT4QDSS, KAC 300m rear, Tango stubby.

I'll try to get some vids soon. 203 is on my block 1 but it's easy to switch it back and forth.https://uploads.tapatalk-cdn.com/202...c762247f45.jpg

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01-15-20, 21:26
Diamondback

Quote:

Originally Posted by Ftrinida1

Update: LMT gen 1 FDE and enhanced carrier, tano G33, NAVSEA SU-231A, SSF trigger, VLTOR A5 H2 w/ green Sprinco, NT4QDSS, KAC 300m rear, Tango stubby.

I'll try to get some vids soon. 203 is on my block 1 but it's easy to switch it back and forth.https://uploads.tapatalk-cdn.com/202...c762247f45.jpg

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Block 1? You scored TWO unicorns? Jelly... trying to decide between looking for a "fake it" rail or just buying the Midwest ASDW upper for my "in-between" when I don't need the compactness of a Mk 18 but want something handier than an M4.
01-15-20, 21:39
Ftrinida1

Quote:

Originally Posted by Diamondback

Block 1? You scored TWO unicorns? Jelly... trying to decide between looking for a "fake it" rail or just buying the Midwest ASDW upper for my "in-between" when I don't need the compactness of a Mk 18 but want something handier than an M4.

Here's the block 1, nothing super rare. I really like the 12.5 barrel length. I'd like to maybe put the Elcan back on the glssc one day and see how far I can push it on the long range.https://uploads.tapatalk-cdn.com/202...9f2b8b4fdb.jpg

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01-15-20, 21:49
Diamondback

Quote:

Originally Posted by Ftrinida1

Here's the block 1, nothing super rare. I really like the 12.5 barrel length. I'd like to maybe put the Elcan back on the glssc one day and see how far I can push it on the long range.https://uploads.tapatalk-cdn.com/202...9f2b8b4fdb.jpg

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That just a regular M4 RAS under there? I'm assuming the thing behind the FSB is a grenade sight of some kind... these little beasts are almost impossible to find tech data and part lists for.
01-15-20, 21:53
Ftrinida1

Quote:

Originally Posted by Diamondback

That just a regular M4 RAS under there? I'm assuming the thing behind the FSB is a grenade sight of some kind... these little beasts are almost impossible to find tech data and part lists for.

Just a regular RAS. I'm gonna test how bad the POI shift/accuracy is on that non free float upper is compared to a free float 14.5 and see how the mounted accessories affect it.

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01-16-20, 15:30
JediGuy

I’m not a clone person. I started down that road and realized it seemed silly to me.

But dang, the uniqueness of the GL/SSC concept makes me want to do an “inspired by” copy.
01-16-20, 15:53
Diamondback

Quote:

Originally Posted by JediGuy

I’m not a clone person. I started down that road and realized it seemed silly to me.

But dang, the uniqueness of the GL/SSC concept makes me want to do an “inspired by” copy.

I'm toying with a few ideas myself, all using pistol braces...
>5.56 "rumored variant" with 10.75" URX II and lo-pro block
>5.56 "inspired" FSP with Centurion C4 cutout rail
>5.56 "inspired" FSP with Midwest 20XG2 cutout rail
>.300BLK "Big Brother" version of any of the above
>.30-06 AR10-frame "BIGGER Brother" version of any of the above; unsure what rails would fit, but designed around the Garand's AP Ball M2 round
01-18-20, 19:49
LowSpeed_HighDrag

How did I not see this thread yet? Incredible carbines there OP, you've amassed a nice and well thought out collection.
01-19-20, 07:23
Ftrinida1

Quote:

Originally Posted by LowSpeed_HighDrag

How did I not see this thread yet? Incredible carbines there OP, you've amassed a nice and well thought out collection.

Thanks for the kind words! I'll be posting more builds in this forum section. Here's a better pic.https://uploads.tapatalk-cdn.com/202...13b97c8319.jpg

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02-24-20, 01:15
Ftrinida1

High quality, full overview pichttps://uploads.tapatalk-cdn.com/202...6c0074e120.jpg

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02-24-20, 12:37
jpmuscle

Quote:

Originally Posted by Ftrinida1

High quality, full overview pichttps://uploads.tapatalk-cdn.com/202...6c0074e120.jpg

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https://uploads.tapatalk-cdn.com/202...90cd625686.jpg

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02-24-20, 16:23
MegademiC

Quote:

Originally Posted by Firefly

I see. If anyone knows a legal way to get WP rounds I need to know.

... for duck hunting

“Real” explosive, wp, etc, projectiles are vapor ware. Ive been looking for years and have never seen one for sale... which is stupid. Id be all over a 40mm if the ammo could be had.

Awesome build OP... one of the coolest guns out there.... please post a video once the auto lower clears... Id love to see it in action.
04-07-20, 22:33
mack7.62

Quote:

Originally Posted by MegademiC

“Real” explosive, wp, etc, projectiles are vapor ware. Ive been looking for years and have never seen one for sale... which is stupid. Id be all over a 40mm if the ammo could be had.

Awesome build OP... one of the coolest guns out there.... please post a video once the auto lower clears... Id love to see it in action.

HE is available but you have to have a legitimate need and duck hunting don't fly. Testing body armor, well guess that's legitimate.

https://www.youtube.com/watch?v=oqyLoU_0Av4

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