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Posted: 10/18/2019 9:24:22 AM EDT
1/Dec/2019 Update: Might as well turn this into a 203/GL thread
 Colt M4A1 Block 1 sbr + Colt M203 40mm grenade launcher with 9" barrel ?? Original thread title and content below: Title: Helps on Form 1 M203 Hi! I'm trying to build the M4A1/M203 I carried in the Marines and I've never Form 1 a grenade launcher before (plenty of SBR and SBS tho) so if anyone here with approved F1 or F4 that can help me out it would be greatly appreciated! Here are my questions: 1. Can I e Form 1 the receiver? 2. If yes, what is the "Type" that people with approved Form 1 put down; "Destructive Device" or "Grenade Launcher"? 3. "Caliber" would be "40mm" right? 4. *See pic below first* The model on my receiver has a "space" between "M" and "203"; do I put down "M 203" or "M203"? I'm asking because I have had examiners who wanted exactly what is engraved on the item that's being registered. 5. *See pic below first* Same question as above; there's a space in between the serial number; what do I put down, space or no space? 6. I'm planning on buying the 9" barrel once approved; I put down "9" for barrel length right? What about overall length with the 9" barrel? 7. Once approved. Can I engraved my info on the barrel? Or does my info have to go on the receiver? Hopefully a few more will followed after this first approved Form 1. Here's pic of the receiver  !
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Posted: 10/18/2019 9:35:38 AM EDT
[#1]
Here's how I did mine, e-filed individual, took nine days to approve. I'm not an expert but it worked for me.
1 - Yes 2 - Destructive Device 3 - 40mm 4 - M203 - I would omit the space 5 - Again I'd omit the space, I don't believe that's part of the serial number 6 - 9" 7 - If I recall the engraving can go on the barrel or receiver. I chose the top of the barrel |
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Posted: 10/18/2019 9:56:38 AM EDT
[#2]
Quote HistoryQuoted:
Here's how I did mine, e-filed individual, took nine days to approve. I'm not an expert but it worked for me. 1 - Yes 2 - Destructive Device 3 - 40mm 4 - M203 - I would omit the space 5 - Again I'd omit the space, I don't believe that's part of the serial number 6 - 9" 7 - If I recall the engraving can go on the barrel or receiver. I chose the top of the barrel You're awesome! Thank you so much! I do have one question. What's the OAL with the 9" barrel; it's the second part of question 6 on my og post? |
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Posted: 10/18/2019 10:00:06 AM EDT
[#3]
Uhhhh, I'll have to find the form and check but I think I just looked it up at 12"
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Posted: 10/18/2019 1:08:31 PM EDT
[#4]
I have a 12" barrel and the Overall length is 15"
ETA- I engraved the top side of the receiver |
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Posted: 10/18/2019 2:42:59 PM EDT
[#5]
I have a LMT.
12 inch barrel, OAL 15 inch. Model "M203" No space. Good luck, and it is a horribly fun gun to shoot. Edit: Destructive Device. |
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Posted: 10/18/2019 4:38:51 PM EDT
[#6]
Thanks gents for all the helps!
Quote HistoryQuoted:
I have a LMT. 12 inch barrel, OAL 15 inch. Model "M203" No space. Good luck, and it is a horribly fun gun to shoot. Edit: Destructive Device. 
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Posted: 10/29/2019 9:12:22 PM EDT
[#7]
Put this together from a pile of parts last night
Form 1 for the 203 submitted early last week. Hopefully it will come back soon. 
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Posted: 11/5/2019 10:46:42 PM EDT
[#8]
Pick up a back issue of Impact: Journal of Tactical Ammunition to get the lowdown on ammo choices for the 40mm.
The author may be a raving asshole, but knows his 40mm. |
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Posted: 11/6/2019 12:24:44 AM EDT
[#9]
How did you submit the Form 1? My e-file individual form 1 came back in 9 days, sent the fingerprints priority... I thought I'd made a mistake when received the email so fast.
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Posted: 11/9/2019 2:45:00 AM EDT
[#10]
Quote HistoryQuoted:
How did you submit the Form 1? My e-file individual form 1 came back in 9 days, sent the fingerprints priority... I thought I'd made a mistake when received the email so fast. |
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Posted: 11/9/2019 3:49:55 PM EDT
[#11]
Hopefully it comes back soon!
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Posted: 11/21/2019 10:41:56 PM EDT
[#12]
Stamp came back after 29 days! Thanks everyone again for the helps!
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Posted: 11/21/2019 11:09:48 PM EDT
[#13]
Quote HistoryQuoted:
Here's how I did mine, e-filed individual, took nine days to approve. I'm not an expert but it worked for me. 1 - Yes 2 - Destructive Device 3 - 40mm 4 - M203 - I would omit the space 5 - Again I'd omit the space, I don't believe that's part of the serial number 6 - 9" 7 - |
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Posted: 11/21/2019 11:16:39 PM EDT
[#14]
I've thought about going this route for my M4 clone. Talk to me about shooting the 40mm. Are you just using chalk rounds, or are there other fun options that aren't too expensive per round? Where did you source the colt receivers for the grenade launcher? Currently, I only find LMT receivers in the military configuration? How much are the Colt versions?
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Posted: 11/21/2019 11:28:23 PM EDT
[#15]
Quote HistoryQuoted:
Stamp came back after 29 days! Thanks everyone again for the helps! |
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Posted: 12/1/2019 11:41:03 AM EDT
[#16]
Quote HistoryQuoted:
I've thought about going this route for my M4 clone. Talk to me about shooting the 40mm. Are you just using chalk rounds, or are there other fun options that aren't too expensive per round? Where did you source the colt receivers for the grenade launcher? Currently, I only find LMT receivers in the military configuration? How much are the Colt versions? |
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Posted: 12/1/2019 12:02:36 PM EDT
[#17]
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Posted: 12/1/2019 1:36:35 PM EDT
[#18]
Lol. There is literally a pic thread at the top of the DD forum page
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Posted: 12/1/2019 1:47:27 PM EDT
[#19]
Quote HistoryQuoted:
Lol. There is literally a pic thread at the top of the DD forum page |
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Posted: 12/2/2019 1:49:59 AM EDT
[#20]
Quote HistoryQuoted:
LOL have you seen the pics in that thread? All blurry and some are not even working.. |
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Posted: 12/2/2019 1:10:19 PM EDT
[#21]
Quote HistoryQuoted:
Yup I'm just gonna shoot cheetos out of it. I got the receiver from Arms Unlimited for $1,400 Is that really the going rate? |
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Posted: 12/2/2019 1:20:03 PM EDT
[#22]
Quote HistoryQuoted:
Damn Is that really the going rate? |
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Posted: 12/3/2019 11:25:31 AM EDT
[#23]
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Posted: 12/5/2019 2:41:52 PM EDT
[#24]
Here's mine (Colt M 203 with a 12 in bbl)
The person shooting it is a retired ST6 vet who was showing us the ropes at a carbine class last month. Wasn't even using the ladder sights - just KY windage. https://www.youtube.com/watch?v=C-AjfduUKkI&feature=emb_title |
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Posted: 12/5/2019 11:05:15 PM EDT
[#25]
Quote HistoryQuoted:
Here's mine (Colt M 203 with a 12 in bbl) The person shooting it is a retired ST6 vet who was showing us the ropes at a carbine class last month. Wasn't even using the ladder sights - just KY windage. https://www.youtube.com/watch?v=C-AjfduUKkI&feature=emb_title Link made hot:  Failed To Load Title |
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Posted: 12/5/2019 11:15:19 PM EDT
[#26]
      
 NorTex Multi Gun stage 3 skip to 8:15 for my attempt to use my M203 at a run and gun... shitty ass TP rounds.  WTF Fall Run and Gun 2019 |
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Posted: 12/5/2019 11:21:05 PM EDT
[#27]
Quote HistoryQuoted:
Here's mine (Colt M 203 with a 12 in bbl) The person shooting it is a retired ST6 vet who was showing us the ropes at a carbine class last month. Wasn't even using the https://www.youtube.com/watch?v=C-AjfduUKkI&feature=emb_title |
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Posted: 1/23/2020 12:28:13 PM EDT
[#28]
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Posted: 1/23/2020 1:11:04 PM EDT
[#29]
Quote HistoryVery nice!
Please tell us about your Aimpoint mount... What make/model is it? What are the functions of that large elevation dial? Is it only setup to work with a specific trajectory arc? |
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Posted: 1/23/2020 2:26:11 PM EDT
[#30]
Quote HistoryQuoted:
Very nice! Please tell us about your Aimpoint mount... What make/model is it? What are the functions of that large elevation dial? Is it only setup to work with a specific trajectory arc? |
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Posted: 2/16/2020 4:10:38 AM EDT
[#31]
Quote HistoryNice!! Who made the launcher?
Took these 2 out for a date on Valentine's Day
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Posted: 2/16/2020 10:12:28 AM EDT
[#32]
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Posted: 2/16/2020 10:52:26 AM EDT
[#33]
Quote History |
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Posted: 2/16/2020 10:56:58 AM EDT
[#34]
Troy EM203
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Posted: 2/17/2020 5:55:29 AM EDT
[#35]
My M203...
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Posted: 2/18/2020 10:31:00 AM EDT
[#36]
Quote HistoryAre you the Marine Major that made the speech at Fairfax!? If yes, much respects Sir and I was there at the Capitol on 1/20/2020 as well 
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Posted: 2/18/2020 11:49:16 AM EDT
[#37]
Quote HistoryQuoted:
Are you the Marine Major that made the speech at Fairfax!? If yes, much respects Sir and I was there at the Capitol on 1/20/2020 as well 
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Posted: 2/18/2020 12:04:53 PM EDT
[#38]
Quote HistoryQuoted:
Maybe. I am a Major in the Marine Corps, but you might not be thinking of me. Lots of people gave speeches at Fairfax.
Thank you for your service(s) sir!  
Edit: M203 thread  Attached FileFarm Safety Day - Firearms Safety session - public school |
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Posted: 2/18/2020 12:48:57 PM EDT
[#39]
How much is ammo for that thing?
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Posted: 2/18/2020 1:16:06 PM EDT
[#40]
Quote HistoryQuoted:
How much is ammo for that thing? Last time I made a large purchase I bought a semi truck load of ammo- literally filled a one car garage. |
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Posted: 2/18/2020 3:23:16 PM EDT
[#41]
Quote HistoryQuoted: Maybe. I am a Major in the Marine Corps, but you might not be thinking of me. Lots of people gave speeches at Fairfax. ?? Edit to add: if you ever head down to Richmond and want to go shoot and grab lunch let me know Sir! |
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Posted: 2/18/2020 3:23:29 PM EDT
[#42]
Quote HistoryQuoted:
Are you the Marine Major that made the speech at Fairfax!? If yes, much respects Sir and I was there at the Capitol on 1/20/2020 as well 
Pic thread: Unfortunately can't add to it  . Hopefully in 2021. I got the big 3 taken care of (NV, Armor, Suppressors). Planned to do a standalone 203 as I have no good way to mount it to my go to rifle which is an SR15 Carbine Mod 2
Edit: If it was actually obtainable to us, I wouldn't hesitate getting a half dozen HE at $40+$200 (and building a magazine). I had no idea it was that cheap. |
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Posted: 2/18/2020 3:28:15 PM EDT
[#43]
Quote HistoryQuoted:
My reaction on 012020 when I put the video, the picture, and the screenname together... https://media.giphy.com/media/GlMN2r04gXTgs/source.gif Pic thread: Unfortunately can't add to it . Hopefully in 2021. I got the big 3 taken care of (NV, Armor, Suppressors). Planned to do a standalone 203 as I have no good way to mount it to my go to rifle which is an SR15 Carbine Mod 2
Edit: If it was actually obtainable to us, I wouldn't hesitate getting a half dozen HE at $40+$200 (and building a magazine). I had no idea it was that cheap. 
As for your 203 mounting solution, you can attach 2 pica sections to your URX4 MLOK slots and use a pica mounted LMT M203
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Posted: 2/18/2020 4:21:03 PM EDT
[#44]
Quote HistoryQuoted:
Hahaha that was me this morning when it clicked
As for your 203 mounting solution, you can attach 2 pica sections to your URX4 MLOK slots and use a pica mounted LMT M203 |
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Posted: 2/18/2020 4:31:03 PM EDT
[#45]
Quote HistoryQuoted: I was just going by the assumption that that wouldn't be strong enough? I have no doubt the URX4 rail is probably strong enough, but would the MLOK rail sections actually take the force of firing? More standalone goodness:  Attached File Attached File(Need to put T2 on a riser.) LMT:  Attached File Attached File Attached File |
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Posted: 2/21/2020 12:31:21 AM EDT
[#46]
Quote HistoryQuoted:
My reaction on 012020 when I put the video, the picture, and the screenname together... https://media.giphy.com/media/GlMN2r04gXTgs/source.gif Pic thread: Unfortunately can't add to it . Hopefully in 2021. I got the big 3 taken care of (NV, Armor, Suppressors). Planned to do a standalone 203 as I have no good way to mount it to my go to rifle which is an SR15 Carbine Mod 2
Edit: If it was actually obtainable to us, I wouldn't hesitate getting a half dozen HE at $40+$200 (and building a magazine). I had no idea it was that cheap. Also, KAC has a full length Keymod Picatinny Rail section that spans the entire length of the handguard..  Attached File |
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Posted: 2/21/2020 9:59:31 AM EDT
[#47]
Quote HistoryQuoted: @trapsh00ter99 do you have the video link by chance? Would love to see it. Also, KAC has a full length Keymod Picatinny Rail section that spans the entire length of the handguard.. https://www.AR15.Com/media/mediaFiles/243617/8ECA1BF0-DC3E-4907-8FC2-759A00E799DB_jpe-1284904.JPG Unfortunately mine is the Mlok version, and I don't see a rail section for that on their website. I guess I will either send KAC an email or post in the industry forum asking about the viability of mounting a 203 on a Mod 2. Standalone isn't a bad option however. |
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Posted: 2/21/2020 12:22:19 PM EDT
[#48]
Quote HistoryQuoted:
I would presume not. More standalone goodness: https://www.AR15.Com/media/mediaFiles/13082/67465574_2506606859395848_16287492232498-1281496.JPG https://www.AR15.Com/media/mediaFiles/13082/67367375_2506606836062517_69114429043638-1281494.JPG (Need to put T2 on a riser.) |
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Posted: 2/21/2020 1:30:14 PM EDT
[#49]
Quote HistoryQuoted: Who makes that first stand alone? Very slick. https://www.fab-defense.com/en/category-parts-and-upgrades/id-57/m203-standalone-conversion-kit.html The stock is available in either L or S length. Mine is L, and the S is pictured at the above link. I'd avoid S unless you're a really small guy wearing body armor. The L is still almost too short for my 6'2" self with a plate carrier. I ordered from their distributor in FL. It doesn't include the forward mounting screws for whatever reason, but Ace Hardware had them (yes I brought it inside ).
I like it because it's lighter and more compact than the LMT conversion, but the LMT does feel slightly more solid with its aluminum construction. One nice thing about the LMT is the launcher can QD using the KAC bracket, and immediately be attached to an M4. The FD-203 requires disassembly (to include swapping the back plate on the receiver). |
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Posted: 2/21/2020 3:16:22 PM EDT
[#50]
Want 40mm.
I cannot continue in good conscience to sit through movies / tv shows and criticizing the plot “have they never heard of belt fed and Indirect fire?!?” if I fail to have both in my set of tools. |
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