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Posted: 7/13/2003 10:45:00 AM EDT
hi everybody i have been checking out this site for a few months now and love it,this is my first post so here goes.i just made the last payment on my house and now i have some spare coin kickin around so i am going to by a colt shortie. my choises are the colt le6920 and the colt le6921,now what is the differnces in accuracy, range and performance and what would you guys get?


thanks your new friend from the great white north
Link Posted: 7/13/2003 11:05:35 AM EDT
16" for extra velocity...
Link Posted: 7/13/2003 11:16:44 AM EDT
This is an ongoing topic and you will recieve MANY opinions. My opinion is get a 16" barrel(preferably M4 profile) and get one of those press-on faux flash hiders to make it look like a 14.5 with flash hider.(faux flash hider slips over the end of the barrel covering the last 1.5 inches or so making it not look like a 16 inch barrel) Just makes it look more bad@$$ to me being shorter.
Link Posted: 7/13/2003 11:24:16 AM EDT
i am in canada so all the rifles have flash hiders and collaspable stocks stright from the factory,so no problem there
Link Posted: 7/13/2003 1:04:39 PM EDT
Go with the true 16" barrel. Besides the extra velocity you can get mid length handguards that increase your sight radius.
Link Posted: 7/13/2003 1:17:18 PM EDT
I say go 14.5. m4s are CQB rifles
Link Posted: 7/13/2003 1:43:49 PM EDT
Just get two of each and your covered!
Link Posted: 7/13/2003 9:15:22 PM EDT
This is an easy one. Go with the LE6920 (16.1" barrel). Reason I say this is that's the only option open to you at this time - from retail sellers. The LE6921 is not being imported at this time (and the ones already in country are rarer than hens' teeth). I've been looking for one (and actual Colt factory made/complete LE6921) myself for the last 5 or so years... hsld. BTW, I've pretty much given up on the search and bought a LE6920. I've also just recently bought an Armalite M15A4 (with 14.5" Hbar, bayo lug, A2 flash hider, and collapsible stock) to tie me over until I come across the 6921...
Link Posted: 7/13/2003 9:33:07 PM EDT
Originally Posted By Nate1: 16" for extra velocity...
View Quote
Roger that. VELOCITY. I've got a 14.5 w/miniYcomp on my M4A3, but would have rather it came with a 16" M4 patrolman's length bbl.
Link Posted: 7/14/2003 4:56:40 AM EDT
I am missing the point of having a 14.5" bbl unless it is Class 3. If you have a 14.5" bbl you will lose some velocity and have to go to the trouble and expense of getting your firearm registered as a SBR, or have to hang an extended type of flashhider or compensator on the end of it to bring it up to the legal 16" requirement. The 11.5" inch bbls with the bulky looking 5" flashhiders look even more ridiculous. If I am missing something please inform me as I need to know.
Link Posted: 7/14/2003 9:05:29 AM EDT
This is a common topic. My major beef is with the US requirement of a permanent muzzle attachment. I'll trade the extra 1.5" for the option to switch muzzle devices with simple handtools. There are some tables floating around, Bushmaster has one, that show little if any velocity difference. The sight radius with standard "Carbine" handguards is the same. The biggest limiting factor will be the twist rate you want. 1/9 is available in a variety of lengths and profiles. 1/7 is much more limited. If Canadian laws allow you to have the real 14.5 without a permament FH, it's really a personal call. I'd go for the 14.5 since it would give you more options with chrome-lining, 1/7" twist.
Link Posted: 7/15/2003 6:52:24 AM EDT
I went with the choice of just getting one in 16.1 and one in 14.5. I had a smith vortex flash suppressor perm attached my Kurt to my 14.5. It is really cool looking. I paid $500 for the colt M4 14.5 1x7, paid $62 for special vortex with holes pre-drilled for soldering purposes before being heat treated. $40 for soldering. It looks awesome. I truly do not believe it makes much difference. It comes down more to look. Velocity diff. is not worth loosing sleep over. Perm attached FH is not a big deal. How many folks change their FH? Weight is lighter. Twist rate may be an issue. My 14.5 is true military upper except full auto business witha 1x7 twist. My civilian version 16.1 is 1x9 twist rate. good luck. You can not make a wrong decision on this one.
Link Posted: 7/15/2003 4:18:47 PM EDT
Easy...just follow one of AR15.com's guidelines. - Get both!
Link Posted: 7/15/2003 7:32:35 PM EDT
The 14.5 inch barrel with a flash suppressor. How much velocity are you going to lose if you use the barrel for CQB. Using M193 you should get reliable fragmentation out to 90m which is great for a rifle designed to go door to door. Just one man's opinion. I think the better choice is 14.5 or 20".
Link Posted: 7/15/2003 8:14:38 PM EDT
[Last Edit: 7/15/2003 8:16:18 PM EDT by model927]
Lets not forget a 14.5 will give the same accuracy as a full size barrel out to 350 yds with a 16" the bullet will fragment out to 130 to 150 yds a 14.5 is 100 yds and under ,the old 653 carbine had the same legnth, velocity has to be kept at 2700 fps to fragment with 55gr,ive got the 14.5 with phantom supressor and considering the statistic since WW2 most, 95%of infantry engagements take place at 100yds and under so I think 14.5 is not stricktly a cQB legnth barrel it does both roles well if you stay within its limits and not use it for something its not,if I have to shoot over 100 yds in a city where I live that would be rare .up here in the northeast its either city,mountain or hills further north not much open space .If I had to go longer Id use my M1a in .308 for a long shot.I like as compact as legally possible.
Link Posted: 7/15/2003 8:27:49 PM EDT
Amen! Go with the 14.5!
Link Posted: 7/15/2003 10:20:05 PM EDT
I to live in the Great White North and my M4 has a 14.5" barrel with A2 bird cage. It works very well out to 500m in service rifle shoots. Would it stop a live target at that range, I don't know but I bought it for service shoots and it kills paper and steel plates well enough for me. BTW, I use it with an Elcan scope.
Link Posted: 7/15/2003 10:25:23 PM EDT
[Last Edit: 7/15/2003 10:25:51 PM EDT by knightone]
If you want more fragmentation range out of a 14.5" barrel, then get one in 1/7 twist. Colt makes many barrels witha 1/7 twist and both Bushmaster and DPMS make runs of M4 profile barrels in that twist every now and then. You will be able to use the heavier 75 and 77 grain rounds which will fragment at lower velocities, around 2000fps. If you are getting a 1/9 twist barrel and plan on using M193, get a 16".
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