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Posted: 8/9/2023 2:40:37 PM EST
Well I didn't feel like messing with registering my braced 9mm Colt SMG clone so I pinned and welded a fake XM177 flash hider on instead. The fake XM flash hider is from Kak Industries. I ended up using an 1/8" end mill instead of a drill bit since there is not much material to drill into for a pin. I sure did not want to go all the way through one side and into the bore.
Any way here it is.  Attached File |
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Posted: 8/9/2023 2:55:08 PM EST
[#1]
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Posted: 8/9/2023 2:59:55 PM EST
[#2]
A friend of mine is a FFL with his SOT. So I went to his shop to use the milling machine the other day and also drool over his collection.
I did cheat a little. I used a crush washer since I didn't have a grenade ring handy. |
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Posted: 8/9/2023 3:01:04 PM EST
[#3]
nice build!
I like the look and it's legal 16 |
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Posted: 8/9/2023 3:06:59 PM EST
[#4]
Quote HistoryQuoted: nice build! I like the look and it's legal 16 |
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Posted: 8/9/2023 6:00:51 PM EST
[#5]
Very nice! Congratulations.
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Posted: 8/9/2023 8:14:41 PM EST
[#6]
If it qualified I would've FreeBR'ed it. A Colt SBR with no Joe Schmoe name scribbled on it with electropen? And at no cost? Yeah.... I woulda FreeBR'ed that one quick.
That said, I do like the look, true classic |
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Posted: 8/9/2023 8:42:27 PM EST
[#7]
Quote HistoryQuoted: If it qualified I would've FreeBR'ed it. A Colt SBR with no Joe Schmoe name scribbled on it with electropen? And at no cost? Yeah.... I woulda FreeBR'ed that one quick. That said, I do like the look, true classic I didn't bother with the free Form 1 because I didn't feel comfortable with it considering everything going on. Plus mine is not a Colt lower, it is a CMMG lower. |
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Posted: 8/10/2023 5:44:22 AM EST
[#8]
That turned out great!
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Posted: 8/10/2023 7:30:22 AM EST
[#9]
Both of those look good.
Are you both using drop in mag blocks for the Colt mags? |
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Posted: 8/10/2023 8:17:34 AM EST
[#10]
Quote HistoryQuoted: Both of those look good. Are you both using drop in mag blocks for the Colt mags? |
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Posted: 8/10/2023 9:09:22 AM EST
[#11]
 Attached FileI bought a used Colt adapter to use but as it had already been pinned the two shops I tried didn't want to install it. I ended up with a Daytona Tactical adapter but I might still use the Colt kit and do it myself if I don't sell it. |
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Posted: 8/10/2023 9:43:23 AM EST
[#12]
Got mine done at TTI just north of Richmond, VA.
Rick has worked on two or three of mine over the last few years. 
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Posted: 8/10/2023 3:15:47 PM EST
[#13]
I will give the following warning to all that are thinking of do the pin and weld job themselves.
The barrel is very thin at the muzzle. There is only 0.080" material between the bore and outside of the threads. You are going to want to use an actual milling machine with a 1/8" end mill. I only plunge cut down 0.040" with the end mill. You will be getting real close to breaking through into the bore if you use a drill bit. Just my opinion, but manufacturers should really use 5/8" - 24 threads for 9mm barrels. 1/2"-28 or 1/2"-36 just doesn't leave much material between the threads and bore. |
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Posted: 8/13/2023 5:04:17 PM EST
[#14]
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Posted: 8/13/2023 8:20:12 PM EST
[#15]
I would have done the free Form 1 if my lower was an actual Colt 9mm lower. As it is, I am happy with it having the extended flash hider pinned and welded.
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Posted: 8/19/2023 6:04:09 PM EST
[#16]
Quote HistoryQuoted: I will give the following warning to all that are thinking of do the pin and weld job themselves. The barrel is very thin at the muzzle. There is only 0.080" material between the bore and outside of the threads. You are going to want to use an actual milling machine with a 1/8" end mill. I only plunge cut down 0.040" with the end mill. You will be getting real close to breaking through into the bore if you use a drill bit. Just my opinion, but manufacturers should really use 5/8" - 24 threads for 9mm barrels. 1/2"-28 or 1/2"-36 just doesn't leave much material between the threads and bore. Agreed 100% - never understood the whole 1/2-anything for 9mm barrels. |
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Posted: 8/24/2023 12:56:41 PM EST
[#17]
Nice rifles guys. I built mine around 2000.
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Posted: 8/24/2023 1:20:18 PM EST
[#18]
Quote HistoryLooks good, did you pin in a 2 pc block?
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Posted: 8/24/2023 10:36:07 PM EST
[#19]
Quote HistoryQuoted: Looks good, did you pin in a 2 pc block? Quote HistoryQuoted: Yes, it's basically a copy of an early Colt, but not a direct copy. I had to figure out dimensions from photos, guns at shows, and one each Colt and Uzi mag. A machinist friend and I made it, starting with a stripped bolt. I bought the few parts that were available, and we made or modified everthing else. |
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